Dental Prosthesis Design
Prostheses and Implants
Joint Prosthesis
Prosthesis Failure
Penile Prosthesis
Heart Valve Prosthesis
Visual Prosthesis
Prosthesis Fitting
Neural Prostheses
Ossicular Prosthesis
Dental Prosthesis
Dental Prosthesis, Implant-Supported
Heart Valve Prosthesis Implantation
Amputees
Blood Vessel Prosthesis
Maxillofacial Prosthesis
Larynx, Artificial
Eye, Artificial
Penile Implantation
Prosthesis-Related Infections
Reoperation
Research Design
Drug Design
Bioprosthesis
Bone Cements
Silicone Elastomers
Dental Prosthesis Retention
Aortic Valve
Polyethylene Terephthalates
Treatment Outcome
Cementation
Amputation Stumps
Analysis of 118 second-generation metal-on-metal retrieved hip implants. (1/4301)
Osteolysis is due to particulate wear debris and is responsible for the long-term failure of total hip replacements. It has stimulated the development of alternative joint surfaces such as metal-on-metal or ceramic-on-ceramic implants. Since 1988 the second-generation metal-on-metal implant Metasul has been used in over 60 000 hips. Analysis of 118 retrieved specimens of the head or cup showed rates of wear of approximately 25 microm for the whole articulation per year in the first year, decreasing to about 5 microm per year after the third. Metal surfaces have a 'self-polishing' capacity. Scratches are worn out by further joint movement. Volumetric wear was decreased some 60-fold compared with that of metal-on-polyethylene implants, suggesting that second-generation metal-on-metal prostheses may considerably reduce osteolysis. (+info)Low-friction arthroplasty of the hip using alumina ceramic and cross-linked polyethylene. A ten-year follow-up report. (2/4301)
We report the results of our continued review of 14 hip arthroplasties using alumina ceramic femoral heads with cross-linked polyethylene cups. There have been no complications and a very low rate of penetration. This was 0.02 mm per year after an initial 'bedding-in' period of two years. There has been no change in the mean rate between our earlier study at six years and the current results at 10 to 11 years. The use of these bearing surfaces appears to reduce the potential amount of polyethylene debris and may provide the next logical stage in the development of the Charnley low-friction arthroplasty. (+info)Cement migration after THR. A comparison of charnley elite and exeter femoral stems using RSA. (3/4301)
Studies using roentgen stereophotogrammetric analysis (RSA) have shown that the femoral components of cemented total hip replacements (THR) migrate distally relative to the bone, but it is not clear whether this occurs at the cement-implant or the cement-bone interface or within the cement mantle. Our aim was to determine where this migration occurred, since this has important implications for the way in which implants function and fail. Using RSA we compared for two years the migration of the tip of the stem with that of the cement restrictor for two different designs of THR, the Exeter and Charnley Elite. We have assumed that if the cement restrictor migrates, then at least part of the cement mantle also migrates. Our results have shown that the Exeter migrates distally three times faster than the Charnley Elite and at different interfaces. With the Exeter migration was at the cement-implant interface whereas with the Charnley Elite there was migration at both the cement-bone and the cement-implant interfaces. (+info)Subsidence of a non-polished stem in revisions of the hip using impaction allograft. Evaluation with radiostereometry and dual-energy X-ray absorptiometry. (4/4301)
We revised 24 consecutive hips with loosening of the femoral stem using impaction allograft and a cemented stem with an unpolished proximal surface. Repeated radiostereometric examinations for up to two years showed a slow rate of subsidence with a mean of 0.32 mm (-2.0 to +0.31). Fifteen cases followed for a further year showed the same mean subsidence after three years, indicating stabilisation. A tendency to retroversion of the stems was noted between the operation and the last follow-up. Retroversion was also recorded when displacement of the stem was studied in ten of the patients after two years. Repeated determination of bone mineral density showed an initial loss after six months, followed by recovery to the postoperative level at two years. Defects in the cement mantle and malalignment of the stem were often noted on postoperative radiographs, but did not correlate with the degrees of migration or displacement. After one year, increasing frequency of trabecular remodelling or resorption of the graft was observed in the greater trochanter and distal to the tip of the stem. Cortical repair was noted distally and medially (Gruen regions 3, 5 and 6). Migration of the stems was the lowest reported to date, which we attribute to the improved grafting technique and to the hardness of the graft. (+info)Determination of Hounsfield value for CT-based design of custom femoral stems. (5/4301)
Ct and advanced computer-aided design techniques offer the means for designing customised femoral stems. Our aim was to determine the Hounsfield (HU) value of the bone at the corticocancellous interface, as part of the criteria for the design algorithm. We obtained transverse CT images from eight human cadaver femora. The proximal femoral canal was rasped until contact with dense cortical bone was achieved. The femora were cut into several sections corresponding to the slice positions of the CT images. After obtaining a computerised image of the anatomical sections using a scanner, the inner cortical contour was outlined and transferred to the corresponding CT image. The pixels beneath this contour represent the CT density of the bone remaining after surgical rasping. Contours were generated automatically at nine HU levels from 300 to 1100 and the mean distance between the transferred contour and each of the HU-generated contours was computed. The contour generated along the 600-HU pixels was closest to the inner cortical contour of the rasped femur and therefore 600 HU seem to be the CT density of the corticocancellous interface in the proximal part of cadaver femora. Generally, femoral bone with a CT density beyond 600 HU is not removable by conventional reamers. Thus, we recommend the 600 HU threshold as one of several criteria for the design of custom femoral implants from CT data. (+info)Endovascular stent graft repair of aortopulmonary fistula. (6/4301)
Two patients who had aortopulmonary fistula of postoperative origin with hemoptysis underwent successful repair by means of an endovascular stent graft procedure. One patient had undergone repeated thoracotomies two times, and the other one time to repair anastomotic aneurysms of the descending aorta after surgery for Takayasu's arteritis. A self-expanding stainless steel stent covered with a Dacron graft was inserted into the lesion through the external iliac or femoral artery. The patients recovered well, with no signs of infection or recurrent hemoptysis 8 months after the procedure. Endovascular stent grafting may be a therapeutic option for treating patients with aortopulmonary fistula. (+info)Total knee replacement: should it be cemented or hybrid? (7/4301)
OBJECTIVE: To compare the complication rates associated with total knee arthroplasty against the types of fixation (hybrid or cemented), using a single total knee design (the anatomic modular knee [AMK] prosthesis). DESIGN: A prospective, nonrandomized, controlled trial. SETTING: University Hospital in London, Ont., a tertiary care teaching centre. PATIENTS: Two groups made up of 484 knees in 395 patients (89 bilateral). INTERVENTIONS: In 260 knees a hybrid configuration (cemented tibia and noncemented femur) was used (group 1). In 224 knees the femoral and tibial components were cemented (group 2). All patellae were cemented in both groups. MAIN OUTCOME MEASURES: Clinical results were assessed by The Knee Society Clinical Rating Scores at 3 months, 6 months and yearly intervals. Radiographic results were determined by 3-foot standing radiographs and at each follow-up visit standing knee radiographs, lateral and skyline views. Radiographs were analysed for alignment, presence or absence of radiolucent lines or changes in the position of the implant. All reoperations and nonoperative complications were recorded. RESULTS: At an average follow-up of 4.8 years, 8 knees (1.6%) required reoperation. An analysis of the complications leading to reoperation demonstrated no difference between the 2 groups. CONCLUSIONS: There was no difference in outcome whether the femoral component was cemented or not. Medium-term results of the AMK are excellent with a very low reoperation rate. (+info)Bileaflet mechanical prostheses for aortic valve replacement in patients younger than 65 years and 65 years of age or older: major thromboembolic and hemorrhagic complications. (8/4301)
OBJECTIVE: To determine major thromboembolic and hemorrhagic complications and predictive risk factors associated with aortic valve replacement (AVR), using bileaflet mechanical prostheses (CarboMedics and St. Jude Medical). DESIGN: A case series. SETTING: Cardiac surgical services at the teaching institutions of the University of British Columbia. PATIENTS AND METHODS: Patients 2 age groups who had undergone AVR between 1989 and 1994 were studied. Group 1 comprised 384 patients younger than 65 years. Group 2 comprised 215 patients 65 years of age and older. RESULTS: The linearized rates of major thromboembolism (TE) occurring after AVR were 1.54%/patient-year for group 1 and 3.32%/patient-year for group 2; the rates for major TE occurring more than 30 days after AVR were 1.13%/patient-year for group 1 and 1.55%/patient-year for group 2. The crude rates for major TE occurring within 30 days of AVR were 1.04% for group 1 and 3.72% for group 2. The death rate from major TE in group 1 was 0.31%/patient-year and in group 2 was 0.88%/patient-year. Of the major TE events occurring within 30 days, 100% of patients in both age groups were inadequately anticoagulated at the time of the event, and for events occurring more than 30 days after AVR, 45% in group 1 and 57% in group 2 were inadequately anticoagulated (INR less than 2.0). The overall linearized rates of major hemorrhage were 1.54%/patient-year for group 1 and 2.21%/patient-year for group 2. There were no cases of prosthesis thrombosis in either group. The mean (and standard error) overall freedom from major TE for group 1 patients at 5 years was 95.6% (1.4%) and with exclusion of early events was 96.7% (1.3%); for group 2 patients the rates were 90.0% (3.2%) and 93.7% (3.0%), respectively. The mean (and SE) overall freedom from major and fatal TE and hemorrhage for group 1 patients was 90.1% (2.3%) and with exclusion of early events was 91.2% (2.3%); for group 2 patients the rates were 87.9% (3.1%) and 92.5% (2.9%), respectively. The 5-year rate for freedom from valve-related death for group 1 patients was 96.3% (2.1%) and for group 2 patients was 97.2% (1.2%). CONCLUSION: The thromboembolic and hemorrhagic complications after AVR with bileaflet mechanical prostheses occur more frequently and result in more deaths in patients 65 years of age and older than in patients years younger than 65 years. (+info)Prosthesis design is a specialized field in medical device technology that involves creating and developing artificial substitutes to replace a missing body part, such as a limb, tooth, eye, or internal organ. The design process typically includes several stages: assessment of the patient's needs, selection of appropriate materials, creation of a prototype, testing and refinement, and final fabrication and fitting of the prosthesis.
The goal of prosthesis design is to create a device that functions as closely as possible to the natural body part it replaces, while also being comfortable, durable, and aesthetically pleasing for the patient. The design process may involve collaboration between medical professionals, engineers, and designers, and may take into account factors such as the patient's age, lifestyle, occupation, and overall health.
Prosthesis design can be highly complex, particularly for advanced devices such as robotic limbs or implantable organs. These devices often require sophisticated sensors, actuators, and control systems to mimic the natural functions of the body part they replace. As a result, prosthesis design is an active area of research and development in the medical field, with ongoing efforts to improve the functionality, comfort, and affordability of these devices for patients.
A dental prosthesis is a device that replaces missing teeth or parts of teeth and restores their function and appearance. The design of a dental prosthesis refers to the plan and specifications used to create it, including the materials, shape, size, and arrangement of the artificial teeth and any supporting structures.
The design of a dental prosthesis is typically based on a variety of factors, including:
* The number and location of missing teeth
* The condition of the remaining teeth and gums
* The patient's bite and jaw alignment
* The patient's aesthetic preferences
* The patient's ability to chew and speak properly
There are several types of dental prostheses, including:
* Dentures: A removable appliance that replaces all or most of the upper or lower teeth.
* Fixed partial denture (FPD): Also known as a bridge, this is a fixed (non-removable) appliance that replaces one or more missing teeth by attaching artificial teeth to the remaining natural teeth on either side of the gap.
* Removable partial denture (RPD): A removable appliance that replaces some but not all of the upper or lower teeth.
* Implant-supported prosthesis: An artificial tooth or set of teeth that is supported by dental implants, which are surgically placed in the jawbone.
The design of a dental prosthesis must be carefully planned and executed to ensure a good fit, proper function, and natural appearance. It may involve several appointments with a dentist or dental specialist, such as a prosthodontist, to take impressions, make measurements, and try in the finished prosthesis.
Prostheses: Artificial substitutes or replacements for missing body parts, such as limbs, eyes, or teeth. They are designed to restore the function, appearance, or mobility of the lost part. Prosthetic devices can be categorized into several types, including:
1. External prostheses: Devices that are attached to the outside of the body, like artificial arms, legs, hands, and feet. These may be further classified into:
a. Cosmetic or aesthetic prostheses: Primarily designed to improve the appearance of the affected area.
b. Functional prostheses: Designed to help restore the functionality and mobility of the lost limb.
2. Internal prostheses: Implanted artificial parts that replace missing internal organs, bones, or tissues, such as heart valves, hip joints, or intraocular lenses.
Implants: Medical devices or substances that are intentionally placed inside the body to replace or support a missing or damaged biological structure, deliver medication, monitor physiological functions, or enhance bodily functions. Examples of implants include:
1. Orthopedic implants: Devices used to replace or reinforce damaged bones, joints, or cartilage, such as knee or hip replacements.
2. Cardiovascular implants: Devices that help support or regulate heart function, like pacemakers, defibrillators, and artificial heart valves.
3. Dental implants: Artificial tooth roots that are placed into the jawbone to support dental prostheses, such as crowns, bridges, or dentures.
4. Neurological implants: Devices used to stimulate nerves, brain structures, or spinal cord tissues to treat various neurological conditions, like deep brain stimulators for Parkinson's disease or cochlear implants for hearing loss.
5. Ophthalmic implants: Artificial lenses that are placed inside the eye to replace a damaged or removed natural lens, such as intraocular lenses used in cataract surgery.
A joint prosthesis, also known as an artificial joint or a replacement joint, is a surgical implant used to replace all or part of a damaged or diseased joint. The most common types of joint prostheses are total hip replacements and total knee replacements. These prostheses typically consist of a combination of metal, plastic, and ceramic components that are designed to replicate the movement and function of a natural joint.
Joint prostheses are usually recommended for patients who have severe joint pain or mobility issues that cannot be adequately managed with other treatments such as physical therapy, medication, or lifestyle changes. The goal of joint replacement surgery is to relieve pain, improve joint function, and enhance the patient's quality of life.
Joint prostheses are typically made from materials such as titanium, cobalt-chrome alloys, stainless steel, polyethylene plastic, and ceramics. The choice of material depends on a variety of factors, including the patient's age, activity level, weight, and overall health.
While joint replacement surgery is generally safe and effective, there are risks associated with any surgical procedure, including infection, blood clots, implant loosening or failure, and nerve damage. Patients who undergo joint replacement surgery typically require several weeks of rehabilitation and physical therapy to regain strength and mobility in the affected joint.
Prosthesis failure is a term used to describe a situation where a prosthetic device, such as an artificial joint or limb, has stopped functioning or failed to meet its intended purpose. This can be due to various reasons, including mechanical failure, infection, loosening of the device, or a reaction to the materials used in the prosthesis.
Mechanical failure can occur due to wear and tear, manufacturing defects, or improper use of the prosthetic device. Infection can also lead to prosthesis failure, particularly in cases where the prosthesis is implanted inside the body. The immune system may react to the presence of the foreign material, leading to inflammation and infection.
Loosening of the prosthesis can also cause it to fail over time, as the device becomes less stable and eventually stops working properly. Additionally, some people may have a reaction to the materials used in the prosthesis, leading to tissue damage or other complications that can result in prosthesis failure.
In general, prosthesis failure can lead to decreased mobility, pain, and the need for additional surgeries or treatments to correct the problem. It is important for individuals with prosthetic devices to follow their healthcare provider's instructions carefully to minimize the risk of prosthesis failure and ensure that the device continues to function properly over time.
A knee prosthesis, also known as a knee replacement or artificial knee joint, is a medical device used to replace the damaged or diseased weight-bearing surfaces of the knee joint. It typically consists of three components: the femoral component (made of metal) that fits over the end of the thighbone (femur), the tibial component (often made of metal and plastic) that fits into the top of the shinbone (tibia), and a patellar component (usually made of plastic) that replaces the damaged surface of the kneecap.
The primary goal of knee prosthesis is to relieve pain, restore function, and improve quality of life for individuals with advanced knee joint damage due to conditions such as osteoarthritis, rheumatoid arthritis, or traumatic injuries. The procedure to implant a knee prosthesis is called knee replacement surgery or total knee arthroplasty (TKA).
A hip prosthesis, also known as a total hip replacement, is a surgical implant designed to replace the damaged or diseased components of the human hip joint. The procedure involves replacing the femoral head (the ball at the top of the thigh bone) and the acetabulum (the socket in the pelvis) with artificial parts, typically made from materials such as metal, ceramic, or plastic.
The goal of a hip prosthesis is to relieve pain, improve joint mobility, and restore function, allowing patients to return to their normal activities and enjoy an improved quality of life. The procedure is most commonly performed in individuals with advanced osteoarthritis, rheumatoid arthritis, or other degenerative conditions that have caused significant damage to the hip joint.
There are several different types of hip prostheses available, each with its own unique design and set of benefits and risks. The choice of prosthesis will depend on a variety of factors, including the patient's age, activity level, overall health, and specific medical needs. In general, however, all hip prostheses are designed to provide a durable, long-lasting solution for patients suffering from debilitating joint pain and stiffness.
A penile prosthesis is a medical device that is implanted inside the penis to treat erectile dysfunction. It consists of a pair of inflatable or semi-rigid rods, which are surgically placed into the corpora cavernosa (the two sponge-like areas inside the penis that fill with blood to create an erection). The implant allows the person with ED to have a controlled and manual erection suitable for sexual intercourse. This is usually considered as a last resort when other treatments, such as medications or vacuum devices, have failed.
A heart valve prosthesis is a medical device that is implanted in the heart to replace a damaged or malfunctioning heart valve. The prosthetic valve can be made of biological tissue (such as from a pig or cow) or artificial materials (such as carbon or polyester). Its function is to allow for the proper directional flow of blood through the heart, opening and closing with each heartbeat to prevent backflow of blood.
There are several types of heart valve prostheses, including:
1. Mechanical valves: These are made entirely of artificial materials and have a longer lifespan than biological valves. However, they require the patient to take blood-thinning medication for the rest of their life to prevent blood clots from forming on the valve.
2. Bioprosthetic valves: These are made of biological tissue and typically last 10-15 years before needing replacement. They do not require the patient to take blood-thinning medication, but there is a higher risk of reoperation due to degeneration of the tissue over time.
3. Homografts or allografts: These are human heart valves that have been donated and preserved for transplantation. They have similar longevity to bioprosthetic valves and do not require blood-thinning medication.
4. Autografts: In this case, the patient's own pulmonary valve is removed and used to replace the damaged aortic valve. This procedure is called the Ross procedure and has excellent long-term results, but it requires advanced surgical skills and is not widely available.
The choice of heart valve prosthesis depends on various factors, including the patient's age, overall health, lifestyle, and personal preferences.
Artificial limbs, also known as prosthetics, are artificial substitutes that replace a part or all of an absent extremity or limb. They are designed to restore the function, mobility, and appearance of the lost limb as much as possible. Artificial limbs can be made from various materials such as wood, plastic, metal, or carbon fiber, and they can be custom-made to fit the individual's specific needs and measurements.
Prosthetic limbs can be categorized into two main types: cosmetic and functional. Cosmetic prosthetics are designed to look like natural limbs and are primarily used to improve the appearance of the person. Functional prosthetics, on the other hand, are designed to help the individual perform specific tasks and activities. They may include features such as hooks, hands, or specialized feet that can be used for different purposes.
Advances in technology have led to the development of more sophisticated artificial limbs, including those that can be controlled by the user's nervous system, known as bionic prosthetics. These advanced prosthetic devices can provide a greater degree of mobility and control for the user, allowing them to perform complex movements and tasks with ease.
A visual prosthesis, also known as a retinal implant or bionic eye, is a medical device that aims to restore some functional vision in individuals who have severe visual impairment or blindness due to certain eye conditions such as retinitis pigmentosa or age-related macular degeneration.
The prosthesis works by electrically stimulating the remaining viable nerve cells in the retina, which then transmit the signals to the brain via the optic nerve. The device typically consists of a camera that captures visual information, a processor that converts the images into electrical signals, and an electrode array that is implanted onto the surface of the retina.
The electrical stimulation of the retinal cells creates patterns of light in the individual's visual field, allowing them to perceive shapes, edges, and movements. While the level of visual acuity achieved with current visual prostheses is still limited, they can significantly improve the quality of life for some individuals by enabling them to perform tasks such as recognizing objects, navigating their environment, and identifying facial expressions.
Prosthesis implantation is a surgical procedure where an artificial device or component, known as a prosthesis, is placed inside the body to replace a missing or damaged body part. The prosthesis can be made from various materials such as metal, plastic, or ceramic and is designed to perform the same function as the original body part.
The implantation procedure involves making an incision in the skin to create a pocket where the prosthesis will be placed. The prosthesis is then carefully positioned and secured in place using screws, cement, or other fixation methods. In some cases, tissue from the patient's own body may be used to help anchor the prosthesis.
Once the prosthesis is in place, the incision is closed with sutures or staples, and the area is bandaged. The patient will typically need to undergo rehabilitation and physical therapy to learn how to use the new prosthesis and regain mobility and strength.
Prosthesis implantation is commonly performed for a variety of reasons, including joint replacement due to arthritis or injury, dental implants to replace missing teeth, and breast reconstruction after mastectomy. The specific procedure and recovery time will depend on the type and location of the prosthesis being implanted.
Prosthesis fitting is the process of selecting, designing, fabricating, and fitting a prosthetic device to replace a part of an individual's body that is missing due to congenital absence, illness, injury, or amputation. The primary goal of prosthesis fitting is to restore the person's physical function, mobility, and independence, as well as improve their overall quality of life.
The process typically involves several steps:
1. Assessment: A thorough evaluation of the patient's medical history, physical condition, and functional needs is conducted to determine the most appropriate type of prosthesis. This may include measurements, castings, or digital scans of the residual limb.
2. Design: Based on the assessment, a customized design plan is created for the prosthetic device, taking into account factors such as the patient's lifestyle, occupation, and personal preferences.
3. Fabrication: The prosthesis is manufactured using various materials, components, and techniques to meet the specific requirements of the patient. This may involve the use of 3D printing, computer-aided design (CAD), or traditional handcrafting methods.
4. Fitting: Once the prosthesis is fabricated, it is carefully fitted to the patient's residual limb, ensuring optimal comfort, alignment, and stability. Adjustments may be made as needed to achieve the best fit and function.
5. Training: The patient receives training on how to use and care for their new prosthetic device, including exercises to strengthen the residual limb and improve overall mobility. Follow-up appointments are scheduled to monitor progress, make any necessary adjustments, and provide ongoing support.
A neural prosthesis is a type of medical device that is designed to assist or replace the function of impaired nervous system structures. These devices can be used to stimulate nerves and restore sensation, movement, or other functions that have been lost due to injury or disease. They may also be used to monitor neural activity and provide feedback to the user or to a external device.
Neural prostheses can take many forms, depending on the specific function they are intended to restore. For example, a cochlear implant is a type of neural prosthesis that is used to restore hearing in people with severe to profound hearing loss. The device consists of a microphone, a processor, and a array of electrodes that are implanted in the inner ear. Sound is converted into electrical signals by the microphone and processor, and these signals are then used to stimulate the remaining nerve cells in the inner ear, allowing the user to hear sounds.
Other examples of neural prostheses include deep brain stimulation devices, which are used to treat movement disorders such as Parkinson's disease; retinal implants, which are used to restore vision in people with certain types of blindness; and sacral nerve stimulators, which are used to treat urinary incontinence.
It is important to note that neural prostheses are not intended to cure or fully reverse the underlying condition that caused the impairment, but rather to help restore some level of function and improve the user's quality of life.
An ossicular prosthesis is a medical device used to replace one or more of the small bones (ossicles) in the middle ear that are involved in hearing. These bones, known as the malleus, incus, and stapes, form a chain responsible for transmitting sound vibrations from the eardrum to the inner ear.
An ossicular prosthesis is typically made of biocompatible materials such as ceramic, plastic, or metal. The prosthesis is designed to bypass damaged or missing ossicles and reestablish the connection between the eardrum and the inner ear, thereby improving hearing function. Ossicular prostheses are often used in surgeries aimed at reconstructing the middle ear, such as tympanoplasty or stapedectomy, to treat various types of conductive hearing loss.
A dental prosthesis is a device that replaces one or more missing teeth or parts of teeth to correct deficiencies in chewing ability, speech, and aesthetics. It can be removable or fixed (permanent) and can be made from various materials such as acrylic resin, porcelain, metal alloys, or a combination of these. Examples of dental prostheses include dentures, bridges, crowns, and implants.
A dental prosthesis that is supported by dental implants is an artificial replacement for one or more missing teeth. It is a type of dental restoration that is anchored to the jawbone using one or more titanium implant posts, which are surgically placed into the bone. The prosthesis is then attached to the implants, providing a stable and secure fit that closely mimics the function and appearance of natural teeth.
There are several types of implant-supported dental prostheses, including crowns, bridges, and dentures. A single crown may be used to replace a single missing tooth, while a bridge or denture can be used to replace multiple missing teeth. The specific type of prosthesis used will depend on the number and location of the missing teeth, as well as the patient's individual needs and preferences.
Implant-supported dental prostheses offer several advantages over traditional removable dentures, including improved stability, comfort, and functionality. They also help to preserve jawbone density and prevent facial sagging that can occur when teeth are missing. However, they do require a surgical procedure to place the implants, and may not be suitable for all patients due to factors such as bone density or overall health status.
Heart valve prosthesis implantation is a surgical procedure where an artificial heart valve is inserted to replace a damaged or malfunctioning native heart valve. This can be necessary for patients with valvular heart disease, including stenosis (narrowing) or regurgitation (leaking), who do not respond to medical management and are at risk of heart failure or other complications.
There are two main types of artificial heart valves used in prosthesis implantation: mechanical valves and biological valves. Mechanical valves are made of synthetic materials, such as carbon and metal, and can last a long time but require lifelong anticoagulation therapy to prevent blood clots from forming. Biological valves, on the other hand, are made from animal or human tissue and typically do not require anticoagulation therapy but may have a limited lifespan and may need to be replaced in the future.
The decision to undergo heart valve prosthesis implantation is based on several factors, including the patient's age, overall health, type and severity of valvular disease, and personal preferences. The procedure can be performed through traditional open-heart surgery or minimally invasive techniques, such as robotic-assisted surgery or transcatheter aortic valve replacement (TAVR). Recovery time varies depending on the approach used and individual patient factors.
An amputee is a person who has had a limb or extremity removed by trauma, medical illness, or surgical intervention. Amputation may affect any part of the body, including fingers, toes, hands, feet, arms, and legs. The level of amputation can vary from partial loss to complete removal of the affected limb.
There are several reasons why a person might become an amputee:
- Trauma: Accidents, injuries, or violence can result in amputations due to severe tissue damage or irreparable vascular injury.
- Medical illness: Certain medical conditions such as diabetes, peripheral arterial disease, and cancer may require amputation if the affected limb cannot be saved through other treatments.
- Infection: Severe infections that do not respond to antibiotics or other treatments may necessitate amputation to prevent the spread of infection.
- Congenital defects: Some individuals are born with missing or malformed limbs, making them congenital amputees.
Amputees face various challenges, including physical limitations, emotional distress, and social adjustment. However, advancements in prosthetics and rehabilitation have significantly improved the quality of life for many amputees, enabling them to lead active and fulfilling lives.
A blood vessel prosthesis is a medical device that is used as a substitute for a damaged or diseased natural blood vessel. It is typically made of synthetic materials such as polyester, Dacron, or ePTFE (expanded polytetrafluoroethylene) and is designed to mimic the function of a native blood vessel by allowing the flow of blood through it.
Blood vessel prostheses are used in various surgical procedures, including coronary artery bypass grafting, peripheral arterial reconstruction, and the creation of arteriovenous fistulas for dialysis access. The choice of material and size of the prosthesis depends on several factors, such as the location and diameter of the vessel being replaced, the patient's age and overall health status, and the surgeon's preference.
It is important to note that while blood vessel prostheses can be effective in restoring blood flow, they may also carry risks such as infection, thrombosis (blood clot formation), and graft failure over time. Therefore, careful patient selection, surgical technique, and postoperative management are crucial for the success of these procedures.
A maxillofacial prosthesis is a custom-made device used to replace all or part of a facial feature, such as an eye, ear, nose, or lip, that has been lost due to trauma, cancer surgery, or other causes. It is typically made from materials like silicone, acrylic, or nylon and is designed to mimic the appearance and texture of natural skin and tissues.
Maxillofacial prostheses are created by trained professionals called maxillofacial prosthodontists, who have specialized training in the diagnosis, treatment planning, and rehabilitation of patients with facial defects. The process of creating a maxillofacial prosthesis typically involves taking an impression of the affected area, creating a custom-made mold, and then fabricating the prosthesis to fit precisely over the defect.
Maxillofacial prostheses can help improve patients' appearance, self-confidence, and quality of life by restoring their facial symmetry and functionality. They may also help protect the underlying tissues and structures from injury or infection, and can be used in conjunction with other treatments, such as radiation therapy or chemotherapy, to enhance their effectiveness.
An artificial larynx, also known as a voice prosthesis or speech aid, is a device used to help individuals who have undergone a laryngectomy (surgical removal of the larynx) or have other conditions that prevent them from speaking normally. The device generates sound mechanically, which can then be shaped into speech by the user.
There are two main types of artificial larynx devices:
1. External: This type of device consists of a small electronic unit that produces sound when the user presses a button or activates it with a breath. The sound is then directed through a tube or hose into a face mask or a mouthpiece, where the user can shape it into speech.
2. Internal: An internal artificial larynx, also known as a voice prosthesis, is implanted in the body during surgery. It works by allowing air to flow from the trachea into the esophagus and then through the voice prosthesis, which creates sound that can be used for speech.
Both types of artificial larynx devices require practice and training to use effectively, but they can significantly improve communication and quality of life for individuals who have lost their natural voice due to laryngeal cancer or other conditions.
Arthroplasty, replacement, is a surgical procedure where a damaged or diseased joint surface is removed and replaced with an artificial implant or device. The goal of this surgery is to relieve pain, restore function, and improve the quality of life for patients who have severe joint damage due to arthritis or other conditions.
During the procedure, the surgeon removes the damaged cartilage and bone from the joint and replaces them with a metal, plastic, or ceramic component that replicates the shape and function of the natural joint surface. The most common types of joint replacement surgery are hip replacement, knee replacement, and shoulder replacement.
The success rate of joint replacement surgery is generally high, with many patients experiencing significant pain relief and improved mobility. However, as with any surgical procedure, there are risks involved, including infection, blood clots, implant loosening or failure, and nerve damage. Therefore, it's essential to discuss the potential benefits and risks of joint replacement surgery with a healthcare provider before making a decision.
An artificial eye, also known as a prosthetic eye, is a type of medical device that is used to replace a natural eye that has been removed or is not functional due to injury, disease, or congenital abnormalities. It is typically made of acrylic or glass and is custom-made to match the size, shape, and color of the patient's other eye as closely as possible.
The artificial eye is designed to fit over the eye socket and rest on the eyelids, allowing the person to have a more natural appearance and improve their ability to blink and close their eye. It does not restore vision, but it can help protect the eye socket and improve the patient's self-esteem and quality of life.
The process of fitting an artificial eye typically involves several appointments with an ocularist, who is a healthcare professional trained in the measurement, design, and fabrication of prosthetic eyes. The ocularist will take impressions of the eye socket, create a model, and then use that model to make the artificial eye. Once the artificial eye is made, the ocularist will fit it and make any necessary adjustments to ensure that it is comfortable and looks natural.
Penile implantation, also known as a prosthetic penis or penile prosthesis, is a surgical procedure to place devices into the penis to help a person with erectile dysfunction (ED) achieve an erection. The two main types of penile implants are inflatable and semi-rigid rods.
The inflatable implant consists of a fluid-filled reservoir, a pump, and two or three inflatable cylinders in the penis. The semi-rigid rod implant is a pair of flexible rods that are bent into an erect position for sexual intercourse and can be straightened when not in use.
Penile implantation is typically considered as a last resort treatment option for ED, when other treatments such as medications, vacuum constriction devices, or penile injections have failed or are not suitable. The procedure is typically performed by a urologist under general or spinal anesthesia and requires a hospital stay of one to two days.
It's important to note that like any surgical procedure, penile implantation also has risks such as infection, bleeding, mechanical failure, and device malfunction. It is essential for patients to discuss the potential benefits and risks with their healthcare provider before making a decision about this treatment option.
Prosthesis-related infections, also known as prosthetic joint infections (PJIs), are infections that occur around or within a prosthetic device, such as an artificial joint. These infections can be caused by bacteria, fungi, or other microorganisms and can lead to serious complications if not treated promptly and effectively.
Prosthesis-related infections can occur soon after the implantation of the prosthetic device (early infection) or months or even years later (late infection). Early infections are often caused by bacteria that enter the surgical site during the procedure, while late infections may be caused by hematogenous seeding (i.e., when bacteria from another source spread through the bloodstream and settle in the prosthetic device) or by contamination during a subsequent medical procedure.
Symptoms of prosthesis-related infections can include pain, swelling, redness, warmth, and drainage around the affected area. In some cases, patients may also experience fever, chills, or fatigue. Diagnosis typically involves a combination of clinical evaluation, laboratory tests (such as blood cultures, joint fluid analysis, and tissue biopsy), and imaging studies (such as X-rays, CT scans, or MRI).
Treatment of prosthesis-related infections usually involves a combination of antibiotics and surgical intervention. The specific treatment approach will depend on the type and severity of the infection, as well as the patient's overall health status. In some cases, it may be necessary to remove or replace the affected prosthetic device.
"Prosthesis coloring" is not a recognized medical term or concept in the field of prosthetics. However, I can provide you with some context that might help clarify what you are looking for.
In the context of artificial limbs (prostheses), patients may want their devices to match their skin tone as closely as possible to make them less noticeable and more aesthetically appealing. This process is called "prosthetic covering" or "cosmesis," which involves applying custom-made covers, sleeves, or skins over the prosthesis to mimic the appearance of natural skin color and texture.
Prosthetic covering materials can be painted, printed, or dyed to achieve the desired color match. This process is often referred to as "coloring" or "painting the prosthesis." The coloring technique may involve using various shades, tones, and textures to create a natural-looking appearance that blends well with the user's remaining limb or body.
In summary, while there is no formal medical definition for "prosthesis coloring," it likely refers to the process of applying custom colors, shading, or patterns to an artificial limb (prosthesis) to create a more natural and aesthetically pleasing appearance that matches the user's skin tone.
A reoperation is a surgical procedure that is performed again on a patient who has already undergone a previous operation for the same or related condition. Reoperations may be required due to various reasons, such as inadequate initial treatment, disease recurrence, infection, or complications from the first surgery. The nature and complexity of a reoperation can vary widely depending on the specific circumstances, but it often carries higher risks and potential complications compared to the original operation.
A research design in medical or healthcare research is a systematic plan that guides the execution and reporting of research to address a specific research question or objective. It outlines the overall strategy for collecting, analyzing, and interpreting data to draw valid conclusions. The design includes details about the type of study (e.g., experimental, observational), sampling methods, data collection techniques, data analysis approaches, and any potential sources of bias or confounding that need to be controlled for. A well-defined research design helps ensure that the results are reliable, generalizable, and relevant to the research question, ultimately contributing to evidence-based practice in medicine and healthcare.
"Drug design" is the process of creating and developing a new medication or therapeutic agent to treat or prevent a specific disease or condition. It involves identifying potential targets within the body, such as proteins or enzymes that are involved in the disease process, and then designing small molecules or biologics that can interact with these targets to produce a desired effect.
The drug design process typically involves several stages, including:
1. Target identification: Researchers identify a specific molecular target that is involved in the disease process.
2. Lead identification: Using computational methods and high-throughput screening techniques, researchers identify small molecules or biologics that can interact with the target.
3. Lead optimization: Researchers modify the chemical structure of the lead compound to improve its ability to interact with the target, as well as its safety and pharmacokinetic properties.
4. Preclinical testing: The optimized lead compound is tested in vitro (in a test tube or petri dish) and in vivo (in animals) to evaluate its safety and efficacy.
5. Clinical trials: If the preclinical testing is successful, the drug moves on to clinical trials in humans to further evaluate its safety and efficacy.
The ultimate goal of drug design is to create a new medication that is safe, effective, and can be used to improve the lives of patients with a specific disease or condition.
A bioprosthesis is a type of medical implant that is made from biological materials, such as heart valves or tendons taken from animals (xenografts) or humans (allografts). These materials are processed and sterilized to be used in surgical procedures to replace damaged or diseased tissues in the body.
Bioprosthetic implants are often used in cardiac surgery, such as heart valve replacement, because they are less likely to cause an immune response than synthetic materials. However, they may have a limited lifespan due to calcification and degeneration of the biological tissue over time. Therefore, bioprosthetic implants may need to be replaced after several years.
Bioprostheses can also be used in other types of surgical procedures, such as ligament or tendon repair, where natural tissue is needed to restore function and mobility. These prostheses are designed to mimic the properties of native tissues and provide a more physiological solution than synthetic materials.
Bone cements are medical-grade materials used in orthopedic and trauma surgery to fill gaps between bone surfaces and implants, such as artificial joints or screws. They serve to mechanically stabilize the implant and provide a smooth, load-bearing surface. The two most common types of bone cement are:
1. Polymethylmethacrylate (PMMA) cement: This is a two-component system consisting of powdered PMMA and liquid methyl methacrylate monomer. When mixed together, they form a dough-like consistency that hardens upon exposure to air. PMMA cement has been widely used for decades in joint replacement surgeries, such as hip or knee replacements.
2. Calcium phosphate (CP) cement: This is a two-component system consisting of a powdered CP compound and an aqueous solution. When mixed together, they form a paste that hardens through a chemical reaction at body temperature. CP cement has lower mechanical strength compared to PMMA but demonstrates better biocompatibility, bioactivity, and the ability to resorb over time.
Both types of bone cements have advantages and disadvantages, and their use depends on the specific surgical indication and patient factors.
Hip arthroplasty, also known as hip replacement surgery, is a medical procedure where the damaged or diseased joint surfaces of the hip are removed and replaced with artificial components. These components typically include a metal or ceramic ball that replaces the head of the femur (thigh bone), and a polyethylene or ceramic socket that replaces the acetabulum (hip socket) in the pelvis.
The goal of hip arthroplasty is to relieve pain, improve joint mobility, and restore function to the hip joint. This procedure is commonly performed in patients with advanced osteoarthritis, rheumatoid arthritis, hip fractures, or other conditions that cause significant damage to the hip joint.
There are several types of hip replacement surgeries, including traditional total hip arthroplasty, partial (hemi) hip arthroplasty, and resurfacing hip arthroplasty. The choice of procedure depends on various factors, such as the patient's age, activity level, overall health, and the extent of joint damage.
After surgery, patients typically require rehabilitation to regain strength, mobility, and function in the affected hip. With proper care and follow-up, most patients can expect significant pain relief and improved quality of life following hip arthroplasty.
Silicone elastomers are a type of synthetic rubber made from silicone, which is a polymer composed primarily of silicon-oxygen bonds. They are known for their durability, flexibility, and resistance to heat, cold, and moisture. Silicone elastomers can be manufactured in various forms, including liquids, gels, and solids, and they are used in a wide range of medical applications such as:
1. Breast implants: Silicone elastomer shells filled with silicone gel are commonly used for breast augmentation and reconstruction.
2. Contact lenses: Some contact lenses are made from silicone elastomers due to their high oxygen permeability, which allows for better eye health.
3. Catheters: Silicone elastomer catheters are flexible and resistant to kinking, making them suitable for long-term use in various medical procedures.
4. Implantable drug delivery systems: Silicone elastomers can be used as a matrix for controlled release of drugs, allowing for sustained and targeted medication administration.
5. Medical adhesives: Silicone elastomer adhesives are biocompatible and can be used to attach medical devices to the skin or other tissues.
6. Sealants and coatings: Silicone elastomers can be used as sealants and coatings in medical devices to prevent leakage, improve durability, and reduce infection risk.
It is important to note that while silicone elastomers are generally considered safe for medical use, there have been concerns about the potential health risks associated with breast implants, such as capsular contracture, breast pain, and immune system reactions. However, these risks vary depending on the individual's health status and the specific type of silicone elastomer used.
Arthroplasty, replacement, knee is a surgical procedure where the damaged or diseased joint surface of the knee is removed and replaced with an artificial joint or prosthesis. The procedure involves resurfacing the worn-out ends of the femur (thigh bone) and tibia (shin bone) with metal components, and the back of the kneecap with a plastic button. This surgery is usually performed to relieve pain and restore function in patients with severe knee osteoarthritis, rheumatoid arthritis, or traumatic injuries that have damaged the joint beyond repair. The goal of knee replacement surgery is to improve mobility, reduce pain, and enhance the quality of life for the patient.
Dental prosthesis retention refers to the means by which a dental prosthesis, such as a denture, is held in place in the mouth. The retention can be achieved through several methods, including:
1. Suction: This is the most common method of retention for lower dentures, where the shape and fit of the denture base create suction against the gums to hold it in place.
2. Mechanical retention: This involves the use of mechanical components such as clasps or attachments that hook onto remaining natural teeth or dental implants to hold the prosthesis in place.
3. Adhesive retention: Dental adhesives can be used to help secure the denture to the gums, providing additional retention and stability.
4. Implant retention: Dental implants can be used to provide a more secure and stable retention of the dental prosthesis. The implant is surgically placed in the jawbone and acts as an anchor for the prosthesis.
Proper retention of a dental prosthesis is essential for optimal function, comfort, and speech. A well-retained prosthesis can help prevent sore spots, improve chewing efficiency, and enhance overall quality of life.
Prosthesis retention, in the context of medical prosthetics, refers to the secure and stable attachment or fixation of a prosthetic device to the body or the remaining limb (stump) of an amputee. The primary goal of prosthesis retention is to ensure that the artificial limb remains in place during various activities, providing optimal functionality, comfort, and safety for the user.
There are several methods for achieving prosthesis retention, including:
1. Suction sockets: A custom-made socket that creates a seal around the residual limb using a special liner and air pressure to keep the prosthesis in place.
2. Mechanical locks: Devices such as pin locks, lanyard locks, or magnetic couplings that secure the prosthetic limb to the residual limb by engaging with specific components within the socket.
3. Vacuum-assisted suspension: A system that uses vacuum pressure to create a seal between the residual limb and the socket, providing retention and stability.
4. Belt or harness systems: Straps or bands that attach to the prosthesis and wrap around the user's body or sound limb to keep the device in place.
5. Osseointegration: A surgical procedure that involves implanting a metal rod directly into the bone, allowing for a direct connection between the residual limb and the prosthetic device.
Prosthesis retention is crucial for ensuring the successful use of an artificial limb, as it enables users to perform their daily activities with confidence and ease.
The aortic valve is the valve located between the left ventricle (the lower left chamber of the heart) and the aorta (the largest artery in the body, which carries oxygenated blood from the heart to the rest of the body). It is made up of three thin flaps or leaflets that open and close to regulate blood flow. During a heartbeat, the aortic valve opens to allow blood to be pumped out of the left ventricle into the aorta, and then closes to prevent blood from flowing back into the ventricle when it relaxes. Any abnormality or damage to this valve can lead to various cardiovascular conditions such as aortic stenosis, aortic regurgitation, or infective endocarditis.
I'm sorry for any confusion, but "Polyethylene Terephthalates" is not a medical term. It is a type of polymer used in the manufacturing of various products, such as plastic bottles and textile fibers. Medically, you might encounter the abbreviation "PET" or "PET scan," which stands for "Positron Emission Tomography." A PET scan is a type of medical imaging that provides detailed pictures of the body's interior. If you have any medical terms you would like defined, I'd be happy to help!
Treatment outcome is a term used to describe the result or effect of medical treatment on a patient's health status. It can be measured in various ways, such as through symptoms improvement, disease remission, reduced disability, improved quality of life, or survival rates. The treatment outcome helps healthcare providers evaluate the effectiveness of a particular treatment plan and make informed decisions about future care. It is also used in clinical research to compare the efficacy of different treatments and improve patient care.
In the medical field, cementation refers to the process of using a type of dental cement or bonding agent to attach a dental restoration (such as a crown, bridge, or false tooth) to a natural tooth or implant. The cement helps to create a strong and secure attachment, while also helping to seal the restoration and prevent the entry of bacteria and saliva.
Dental cement can be made from various materials, including glass ionomers, resin-modified glass ionomers, zinc phosphate, and polycarboxylate cements. The choice of cement depends on several factors, such as the type of restoration being attached, the location in the mouth, and the patient's individual needs and preferences.
Cementation is an important step in many dental procedures, as it helps to ensure the longevity and success of the restoration. Proper technique and material selection are crucial for achieving a successful cementation that will last for years to come.
Amputation stumps, also known as residual limbs, refer to the remaining part of a limb after it has been amputated. The stump includes the soft tissue and bone that were once part of the amputated limb. Proper care and management of the amputation stump are essential for optimal healing, reducing the risk of complications such as infection or delayed wound healing, and promoting successful prosthetic fitting and use. This may involve various treatments such as wound care, pain management, physical therapy, and the use of specialized medical devices.
A partial denture that is fixed, also known as a fixed partial denture or a dental bridge, is a type of prosthetic device used to replace one or more missing teeth. Unlike removable partial dentures, which can be taken out of the mouth for cleaning and maintenance, fixed partial dentures are permanently attached to the remaining natural teeth or implants surrounding the gap left by the missing tooth or teeth.
A typical fixed partial denture consists of an artificial tooth (or pontic) that is fused to one or two crowns on either side. The crowns are cemented onto the prepared surfaces of the adjacent teeth, providing a stable and secure attachment for the pontic. This creates a natural-looking and functional replacement for the missing tooth or teeth.
Fixed partial dentures offer several advantages over removable options, including improved stability, comfort, and aesthetics. However, they typically require more extensive preparation of the adjacent teeth, which may involve removing some healthy tooth structure to accommodate the crowns. Proper oral hygiene is essential to maintain the health of the supporting teeth and gums, as well as the longevity of the fixed partial denture. Regular dental check-ups and professional cleanings are also necessary to ensure the continued success of this type of restoration.
Robotic prosthesis control
Palatal lift prosthesis
Voice prosthesis
Prosthesis
Craniofacial prosthesis
Veterinary prosthesis
Breast prostheses
Nose prosthesis
Photovoltaic retinal prosthesis
Ankle replacement
Pázmány Péter Catholic University
Neural control of limb stiffness
Jean-Baptiste Alaize
List of bra designs
Catacombs of the Moon
Zephyr Surgical Implants
Penile implant
Medical equipment management
Curley Christian
Caroline Eichler
3D scanning
Five-bar linkage
Bertin Nahum
September 1979
The Human Use of Human Beings
Hippocampal prosthesis
Professor Hamilton
Mark S. Humayun
Industrial design
Carsen Stringer
Mix'n'match prostheses | Design Indaba
A VIRTUAL DENTAL PROSTHESES DESIGN METHOD USING A VIRTUAL ARTICULATOR / The Design Society
Design and Integration of an Inexpensive Wearable Mechanotactile Feedback System for Myoelectric Prostheses - IEEE Journal of...
TKA Prosthesis Design - Recon - Orthobullets
Large scale retinal modeling for the design of new generation retinal prostheses - Nottingham ePrints
The potential for bronchoscopic lung volume reduction using bronchial prostheses: a pilot study
Robotic prosthesis control - Wikipedia
Prosthesis Archives - Design Engineering
test - Custom Prosthesis Designs, Inc.
Prosthesis Designs and Tuberosity Fixation | Encyclopedia MDPI
Designing game-based myoelectric prosthesis training - The Lincoln Repository
A need for a more user-centered design in body powered prostheses<...
Blood vessel prosthesis at the Dutch Design Week - MDR Research
Designing the Screw Retained Prosthesis - An Encore Webinar | Whip Mix
Evaluation of Gait Performance of a Hemipelvectomy Amputation Walking with a Canadian Prosthesis
JFB | Free Full-Text | Evaluating the Surface Topography of Pyrolytic Carbon Finger Prostheses through Measurement of Various...
Design of an agonist-antagonist active knee prosthesis - MIT Media Lab
What Factors Matter in Designing Custom Hair Prosthesis? - Hair Center Palm Beach
DESIGN AND PRODUCTION OF EYE PROSTHESIS USING 3D PRINTING | MM Science Journal
Restore Your Vision: Innovative Implants In The Optics World | HealthNews
03 - How To Design Your Own Prosthesis - Chapter 08 | Read by Sam Gabriel
BibSLEIGH - ICT Methodologies to Model and Simulate Parts of Human Body for Prosthesis Design
9- Pre-Designed Hair Piece/Prosthesis Pt-2 Webinar REPLAY- STOP 4 - Hair Replacement By Gigi
Eliciting children's expectations for hand prostheses through generative design tools / North American Chapter
New Middle Ear Prosthesis Implanted in First Patient
"Natural history of gutter-related type Ia endoleaks after snorkel/chimney endovascular aneurysm repair." by Brant W...
A New Deformation Pose Estimation Algorithm for the Fully Automatic Design of Patient Specific Knee Prosthesis: Preliminary...
Fenestrated pedicle screws for cement-augmented purchase in patients with bone softening: a review of 21 cases
Application of magnetorheological fluids in the design of a leg prosthesis with active damping | MATEC Web of Conferences
DigitalCommons@Kennesaw State University - Symposium of Student Scholars: Design of a Soft Hand Prosthesis For Amputees With a...
Body powered prostheses3
- Users of body powered prostheses (BPP) complain about too high operating forces, leading to pain and/or fatigue during or after prosthetic operation. (tudelft.nl)
- Body-powered prostheses are the most often prescribed because they tend to be less expensive, more durable, and require less maintenance. (msdmanuals.com)
- Sensors and other inputs detect muscle movement of the residual limb or upper body and control powered actuators that provide greater grasp force than body-powered prostheses. (msdmanuals.com)
Implants5
- Aim: To design a surgical template to guide the insertion of craniofacial implants for nasal prosthesis retention. (unibo.it)
- Conclusions: The protocol presented in this article may represent a viable way to position craniofacial implants for supporting nasal prostheses. (unibo.it)
- Topics also include the design of prosthetic/orthotic devices and implants or the design of intelligent and robotic biomedical assistive and rehabilitation devices. (carleton.ca)
- Endosseous dental implants are titanium fixtures that are placed in edentulous ridges to serve as support for fixed or removable dental prostheses used to restore dentition. (medscape.com)
- There are many commercial brands of dental implants that may vary slightly in design, surface treatment, and other qualities. (medscape.com)
Retinal prosthesis1
- However, a retinal prosthesis has several limitations with regard to its hardware and biological functions, and several attempts have been made to overcome these limitations. (nottingham.ac.uk)
Myoelectric prosthesis2
- A myoelectric prosthesis (myo) is a dexterous artificial limb controlled by muscle contractions. (lincoln.ac.uk)
- A MICE-generator-powered myoelectric prosthesis could provide power for a full day of activities using a single 50 cc cartridge of butane, representing a vast improvement over current prostheses. (sbir.gov)
Gait5
- Robotic prosthesis control is a method for controlling a prosthesis in such a way that the controlled robotic prosthesis restores a biologically accurate gait to a person with a loss of limb. (wikipedia.org)
- To Design an impedance controller, a regression analysis of gait data is used to parameterize an impedance function. (wikipedia.org)
- Educate your patients on getting familiar with their prosthesis and guiding them through gait training. (ottobock.com)
- Once a patient has been fitted with a new prosthesis for the first time, you'll want to start a gait training programme tailored to the components selected for their new prosthetic solution. (ottobock.com)
- Such analyses are important in diagnostics (e.g., gait analysis, fracture prediction) and for device evaluation (e.g. heart valve design or repair, implant performance prediction). (carleton.ca)
Transfemoral4
- In the 1970s several researchers developed a tethered electrohydraulic transfemoral prosthesis. (wikipedia.org)
- In this proposed Phase I program, the operation of a MICE generator at the nominal power output level required for transfemoral and transhumeral prostheses will be demonstrated. (sbir.gov)
- Also, the power requirements for transfemoral and transhumeral prostheses will be characterized, and conceptual designs for these prostheses will be developed based on a MICE generator power source. (sbir.gov)
- But now a 15-patient study of transfemoral, transeptal TMVR - with a prosthesis designed for the mitral position and previously tested only transapically - has shown good 30-day results in that MR was essentially abolished with virtually no paravalvular leakage. (medscape.com)
20231
- Prosthesis Designs and Tuberosity Fixation" Encyclopedia , https://encyclopedia.pub/entry/14961 (accessed November 30, 2023). (encyclopedia.pub)
Robotic4
- The relationship this imposes for robotic prosthesis the relationship in between force production in response to the motion imposed by the environment. (wikipedia.org)
- For lower limb robotic prosthesis it is important to be able to determine if the user wants to walk on level ground, up a slope, or up stairs. (wikipedia.org)
- Each patient that uses a robotic prosthesis that is tuned for this type of control has to have their system trained for them specifically. (wikipedia.org)
- The Bento Arm is an anthropometric robotic arm designed specifically for robotic prosthesis training and research applications. (github.com)
Prosthetics1
- Overview of Limb Prosthetics A limb prosthesis is an artificial limb that replaces a missing body part. (msdmanuals.com)
Prototype6
- We present the design and physical implementation of the active knee prosthesis prototype. (mit.edu)
- The paper deals with the production of a prototype of aesthetic eye prosthesis using procedures related to reverse engineering technology. (mmscience.eu)
- By this shape change, the core of the prosthesis prototype was created. (mmscience.eu)
- The core of the prosthesis prototype was printed on a full-color 3D printer Stratasys J750, which uses additive PolyJet technology based on the curing of photopolymers. (mmscience.eu)
- The design process is presented in detail, resulting in a prototype that comprises four adaptors of simple design. (silverchair.com)
- The process of system designing is completed using a prototype to examine the method of operation as well as to obtain the required forces for choosing electrical elements. (tuhh.de)
Amputation2
- In one research study the loads applied on prosthesis were evaluated during walking of a subject with hip disarticulation amputation [ 8 ]. (hindawi.com)
- a) Subject with hemipelvectomy amputation without prosthesis and (b) the subject while standing with a Canadian prosthesis. (hindawi.com)
Transhumeral1
- The aim of this study was to demonstrate the functionality of an inexpensive mechanotactile sensory feedback system for transhumeral myoelectric prostheses. (embs.org)
Amputee4
- S. K. Au, J. Weber, H. M. Herr and E.C. Martinez-Villapando, Powered ankle-foot prosthesis for the improvement of amputee ambulation, IEEE Engineering in Medicine and Biology International Conference, Lyon, France, pp. 3020-3026, 2007. (mit.edu)
- However, control of myoelectric prostheses remains a challenge despite recent technological advances due to overuse injuries and device rejection by the amputee. (kennesaw.edu)
- Watch how a below-knee amputee dons a prosthesis designed with a common socket and liner combination. (ottobock.com)
- Watch how an above-knee amputee dons a prosthesis with a more complex but user-friendly socket configuration. (ottobock.com)
Prosthetic device2
- Aerodyne Research, Inc. (ARI) and Vanderbilt University propose to address this need for high energy density power for prosthetic device by developing powered prostheses using ARI's miniature internal combustion engine (MICE) generator for the electric power source. (sbir.gov)
- Overview of human anatomy and physiology with emphasis on artificial organ and prosthetic device design requirement. (carleton.ca)
Mobility1
- For example, prostheses can be designed for general daily mobility, for specific activities such as swimming, or for high-impact and competitive sports such as running. (msdmanuals.com)
Biomechanics1
- Quantifying the biomechanics and motor control of prosthesis and orthosis users to advance therapeutic and device interventions for enhanced function. (northwestern.edu)
Bone5
- Prosthesis designs, bone grafting and tuberosity fixation techniques have evolved to allow better and more reliable fixation of tuberosities and bony ingrowth. (encyclopedia.pub)
- I had prostetic bone replacement done in 2002 however I have had many infections and issues over the years in they middle ear to the point I became very sick and hospitalized after several CT scans the last 3 or 4 years my new ENT finally found my problem somehow the prosthesis went through the middle ear into the inner ear almost to the bone structure of the brain! (hearingreview.com)
- This project address the enhancement of these designs by analyzing in deep biomechanical factors as fatigue, wear, bone loss of density, etc. (europa.eu)
- Comparative analyses will be performed to assess the behavior of different prostheses geometries thus allowing to make relevant changes both in geometry and prosthesis alignment, driven by the stresses gradients around the interface bone-prosthesis. (europa.eu)
- As well, the prosthesis stem geometry is crucial for the coupling boneprosthesis,because the interface stresses can generate bone reabsorption. (europa.eu)
Externally1
- Externally powered myoelectric prostheses provide active hand and joint movement without the need of scapular, humeral, or trunk motion. (msdmanuals.com)
Biologically1
- Understanding the importance and specific design features of the EBC zones facilitates esthetic and biologically sound treatment outcomes with interim and definitive implant restorations. (researchgate.net)
Effectively2
- Learning to use a myo can be challenging, so extensive training is often required to use a myo prosthesis effectively. (lincoln.ac.uk)
- Activity-specific prostheses are designed to allow participation in activities that would otherwise damage the patient's residual limb or everyday prosthesis, or when the everyday prosthesis would not function effectively. (msdmanuals.com)
Parameters2
- Furthermore, there are a few studies on kinetic and kinematic parameters of Canadian prosthesis users [ 6 , 7 , 9 ]. (hindawi.com)
- Overview The EBC concept considers specific parameters for proper design of the emergence profile of implant‐supported restorations. (researchgate.net)
Knee joint1
- He used a Canadian prosthesis with single axis ankle joint, 3R21 knee joint, and 7E7 hip joint for more than 10 years. (hindawi.com)
Restore2
- In the future, when nanotechnology gains more popularity and is completely integrated inside the prosthesis, this concept can be utilized to restore useful visual information such as colour, depth, and contrast to achieve high-quality vision in the blind. (nottingham.ac.uk)
- Researchers at Stanford University have since sought a solution to this pressing problem by designing a retinal implant that can restore vision. (healthnews.com)
Kinematic2
- By using this articulator, kinematic analysis can be taken into account in the design of dental prostheses, which constitutes a significant improvement in this field. (designsociety.org)
- There was a significant asymmetry between the kinetic and kinematic performance of the sound and prosthesis sides, which may be due to lack of muscular power and alignment of prosthesis components. (hindawi.com)
Accurate2
- Taking accurate head measurements is a crucial step in designing the perfect custom hair system for you. (haircenterofpalmbeaches.com)
- Accurate measurements are essential for designing a custom hair prosthesis that fits perfectly and looks natural, while the type of base material used will determine its durability. (haircenterofpalmbeaches.com)
Acrylic1
- Due to the complexity of the prosthesis shape, the 3D model was obtained by scanning a hand-made acrylic prosthesis on the ATOS Compact Scan. (mmscience.eu)
Feasibility1
- This study aimed to review the principals involved, clinical indication, planning, in order to discuss the feasibility and clinical effectiveness of prosthesis type overlay and leveling the occlusal technique Broadrick, identifying their indications, advantages and disadvantages through the presentation of a clinical case. (bvsalud.org)
Comfortable2
- Help your patient get comfortable with their new prosthesis by starting with simple back-and-forth movements from their sound side to their affected side. (ottobock.com)
- There are many different options for prostheses, but all options aim to achieve a stable, comfortable fit. (msdmanuals.com)
Evaluation1
- The paper concludes with an overall evaluation of the achieved results with a description of problematic production steps and a proposal for a procedure for the future production of prostheses by 3D printing. (mmscience.eu)
Degrees of Free2
- Such limitations in the energy source significantly limit the utility of these prostheses, and impede the motivation for addressing other shortcomings such as number of degrees of freedom and power output. (sbir.gov)
- In this article, a rehabilitation system has been designed for hand tendon injury using observations of traditional rehabilitation of hand injuries after surgery and recovery period, and through a mechanism based on structures restricting undesirable degrees of freedom. (tuhh.de)
Functionality1
- Focus on helping them regain their balance and build their confidence: start by explaining the functionality of the new prosthesis and the everyday motion sequences it supports, especially the prosthetic foot for TT users and prosthetic knee for TF users. (ottobock.com)
System6
- It is essential to take this into account when designing a personalized hair replacement system. (haircenterofpalmbeaches.com)
- As overpopulation and lack of rainfall fuel a crisis-level need in rural India for affordable drinking water, PhD candidate Natasha Wright and Assistant Professor Amos Winter work to design a low-cost desalination system, guided by insight from their extensive in-the-field research. (mit.edu)
- Title: Design of a Hand Tendon Injury Rehabilitation System Using a DOF Constrainer Mechanism. (tuhh.de)
- We have helped design and implement phase 2 studies of many of the major classes of drugs currently in use, including NSAIDs, cox-2 selective inhibitors, opioids, topical analgesic agents and novel approaches to pain including antibodies to NGF (nerve growth factor) and other agents active on the peripheral nervous system. (northwestern.edu)
- The EOSINT M 270 system can be used to make model cast prostheses. (eos.info)
- A harness-cable system suspends the prosthesis and captures scapular and humeral motion to operate the hook, hand, or elbow joint. (msdmanuals.com)
PROCESSES2
- This thesis focuses on the biological aspects of retinal prostheses: the biological processes occurring inside the retina and the limitations of retinal prostheses corresponding to those processes have been analysed. (nottingham.ac.uk)
- This article describes the processes involved with designing, developing and manufacturing such a prosthesis . (bvsalud.org)
Specifically2
- A cranial Prosthesis is a hair piece designed specifically for those who have experienced hair loss due to medical conditions. (hairreplacementbygigi.com)
- Specifically, current myoelectric prostheses utilize rechargeable batteries, which provide typically less than 10% of the daily energy required for typical activities of daily living. (sbir.gov)
Clinical2
- Therefore, the purpose of this paper is to propose a clinical guideline for designing an abutment/prosthesis based on implant position. (researchgate.net)
- Clinical significance Proper emergence profile design supports esthetic outcomes and provides favorable biological response to implant‐supported restorations. (researchgate.net)
Reduction1
- It is well known that small variations in the prosthesis geometry can lead to increment/decrement of wear and thus to a reduction/increase of the prosthesis lifespan. (europa.eu)
Risk Factors1
- Hence, the primary aim is to prevent perioperative infections by identifying risk factors, such as type of prosthesis. (cdc.gov)
Abutment2
- While implant positioning and adequate amounts of soft and hard tissues are essential for achieving an esthetic outcome, the emergence profile of an abutment/restoration also plays an important role in the definitive appearance of implant prostheses. (researchgate.net)
- The transmucosal abutment is the link between the implant body and the prosthesis, usually made of titanium. (medscape.com)
Cycling-specific1
- If the individual previously participated in cycling, a cycling-specific prosthesis could allow these activities to be integrated into rehabilitation methods . (bvsalud.org)
Reverse1
- Reverse prostheses have since undergone changes to address some of the problems seen with the original design. (encyclopedia.pub)
Crowns2
- Evan Kemper, RG, CDT, and our presenter, will demonstrate the use of 3Shape Dental Designer software used to design screw-retained implant crowns with gingival architecture. (whipmix.com)
- Bridges, crowns and model cast prostheses are usually manufactured by hand - a complex and cost-intensive process. (eos.info)
Type2
- There are multiple ways to do this, depending on the type of prosthesis your patient is using and the condition of their residual limb. (ottobock.com)
- The prosthetist helps patients choose the type of prosthesis and options they need to accomplish their goals. (msdmanuals.com)
Typically1
- Hybrid prostheses are typically prescribed for higher level upper-limb amputations. (msdmanuals.com)
Device3
- They may assist the patient with their prosthesis at first, but the ultimate goal is for the patient to learn how to control and maintain their device themself. (ottobock.com)
- Currently, TMVR is approved in the United States only using one device designed for the aortic position and only for treating failed surgical mitral bioprostheses in high-risk patients. (medscape.com)
- The device, which is called a prosthesis, can help you to perform daily activities such as walking, eating, or dressing. (medlineplus.gov)
Types1
- The purpose of our research program is to develop, evaluate and implement novel and effective methods to enhance community participation, quality of life and access to high-quality services and devices for persons with various types of disabilities, particularly those that use prostheses and orthoses. (northwestern.edu)
Graduate2
- In class 2.702 (Systems Engineering and Naval Ship Design), naval officers and other graduate students get hands-on experience in project management skills that will be central to their future careers. (mit.edu)
- MIT graduate student Katy Olesnavage redesigns the Jaipur Foot to create a high-value prosthesis at a low cost for those in need in developing countries. (mit.edu)
Fundamental1
- Students learn the fundamental principles of manufacturing at scale by designing and producing their own yo-yos. (mit.edu)
Users2
- It will take a detailed look at the exceptional tools which 3Shape provides its users with to simplify the task of fabricating these popular prostheses. (whipmix.com)
- One of the first skills new prosthetic users need to learn is how to put on and take off their prosthesis. (ottobock.com)
Placement2
- By contributing to distal lung collapse, bronchoscopic placement of valved prostheses has the potential to noninvasively replicate the beneficial effects of LVRS. (nih.gov)
- The single-part design penetrates mucosa from the time of placement. (medscape.com)
Definitive1
- Computer-aided design and manufacturing construction of a surgical template for craniofacial implant positioning to support a definitive nasal prosthesis. (unibo.it)
Function3
- For lower limb prosthesis the impedance function looks similar to the following equation. (wikipedia.org)
- The project was divided in four stages that covered design, stress analyses, manufacture, and function assessment of the components. (silverchair.com)
- Conclusions Each of the zones described in the EBC concept have a specific function in the design of the emergence profile. (researchgate.net)
Torque1
- This means that over the stance phase, depending on the speed the subject is moving, there is a derivable torque angle relationship that can be used to control a lower limb prosthesis. (wikipedia.org)
Implant design1
- the variety of products offered by manufacturers can vary in implant design, surface treatment, and many other features that can enhance implant quality for any particular case. (medscape.com)
Patient10
- Four to 11 prostheses per patient took 52 to 137 min to obstruct upper-lobe segments bilaterally. (nih.gov)
- University Hospitals Case Medical Center has announced that a new prosthesis has been developed for use in a traditional middle ear surgery-a stapedectomy -and has been successfully implanted in an otosclerosis patient. (hearingreview.com)
- The first patient to receive the new prosthesis is a 63-year-old woman with otosclerosis, a hereditary disorder that causes the bones of the middle ear-the malleus, incus, and stapes-to become immobilized and stop vibrating, leading to hearing loss. (hearingreview.com)
- Dr Megerian's first patient to receive the new prosthesis-the first patient in the world to benefit from it-has experienced a complete restoration of hearing in her treated ear. (hearingreview.com)
- In the context of automatic landmarks localization with statistical shape models for the design of customized TKA prosthesis, the first step consists of registering a model, represented by the mean mesh of some healthy femoral bones, towards the segmented femur of the patient. (easychair.org)
- The next step will be to assess it in its application field i.e. the automatic localization of knee landmarks for the design of patient-specific knee prosthesis. (easychair.org)
- inproceedings{CAOS2020:New_Deformation_Pose_Estimation, author = {Charles Garraud and Arnaud Clav\textbackslash{}'e and J\textbackslash{}'er\textbackslash{}\textasciicircum{}ome Ogor and Eric Stindel and Guillaume Dardenne}, title = {A New Deformation Pose Estimation Algorithm for the Fully Automatic Design of Patient Specific Knee Prosthesis: Preliminary Results}, booktitle = {CAOS 2020. (easychair.org)
- While your patient is getting used to their first prosthesis, much of your focus should be on helping them learn the basic skills they need for day-to-day life with lower limb loss. (ottobock.com)
- When your patient is getting used to a new prosthesis, it's essential for them to learn how to trust their new leg. (ottobock.com)
- Last year, Wentai Liu watched as surgeons implanted a microchip he had designed into the eye of a blind patient. (ucsc.edu)
Stability1
- He is particularly interested in designing interventions to enhance locomotor stability. (northwestern.edu)
Control1
- The arm was designed to be 1:1 scale with anatomical proportions and uses the MX-series of Dynamixel actuators which include integrated position and velocity joint feedback and control. (github.com)
Crucial1
- The age of an individual plays a crucial role in determining the appropriate style, fit, and color for their custom hair prosthesis. (haircenterofpalmbeaches.com)
General2
- Planificación y delineamiento de las prótesis en general o de una prótesis específica. (bvsalud.org)
- The plan and delineation of prostheses in general or a specific prosthesis. (bvsalud.org)