The part of the pelvis that comprises the pelvic socket where the head of FEMUR joins to form HIP JOINT (acetabulofemoral joint).
A genus of green algae found in the Mediterranean and other warm seas.
The joint that is formed by the articulation of the head of FEMUR and the ACETABULUM of the PELVIS.
Congenital dislocation of the hip generally includes subluxation of the femoral head, acetabular dysplasia, and complete dislocation of the femoral head from the true acetabulum. This condition occurs in approximately 1 in 1000 live births and is more common in females than in males.
The hemispheric articular surface at the upper extremity of the thigh bone. (Stedman, 26th ed)
Displacement of the femur bone from its normal position at the HIP JOINT.
Bones that constitute each half of the pelvic girdle in VERTEBRATES, formed by fusion of the ILIUM; ISCHIUM; and PUBIC BONE.
Replacement for a hip joint.
The surgical cutting of a bone. (Dorland, 28th ed)
Replacement of the hip joint.
Attachment of a bone in which its head and neck is rotated excessively backward.
Malfunction of implantation shunts, valves, etc., and prosthesis loosening, migration, and breaking.
One of three bones that make up the coxal bone of the pelvic girdle. In tetrapods, it is the part of the pelvis that projects backward on the ventral side, and in primates, it bears the weight of the sitting animal.
The largest of three bones that make up each half of the pelvic girdle.
A particular type of FEMUR HEAD NECROSIS occurring in children, mainly male, with a course of four years or so.
The plan and delineation of prostheses in general or a specific prosthesis.
The grafting of bone from a donor site to a recipient site.
A pathological mechanical process that can lead to hip failure. It is caused by abnormalities of the ACETABULUM and/or FEMUR combined with rigorous hip motion, leading to repetitive collisions that damage the soft tissue structures.
Noninflammatory degenerative disease of the hip joint which usually appears in late middle or old age. It is characterized by growth or maturational disturbances in the femoral neck and head, as well as acetabular dysplasia. A dominant symptom is pain on weight-bearing or motion.
The longest and largest bone of the skeleton, it is situated between the hip and the knee.
The joining of objects by means of a cement (e.g., in fracture fixation, such as in hip arthroplasty for joining of the acetabular component to the femoral component). In dentistry, it is used for the process of attaching parts of a tooth or restorative material to a natural tooth or for the attaching of orthodontic bands to teeth by means of an adhesive.
A bone that forms the lower and anterior part of each side of the hip bone.
Roentgenography of a joint, usually after injection of either positive or negative contrast medium.
An oral retinoid used in the treatment of keratotic genodermatosis, lichen planus, and psoriasis. Beneficial effects have also been claimed in the prophylaxis of epithelial neoplasia. The compound may be teratogenic.
Breaks in bones.
The development of bony substance in normally soft structures.
A developmental deformity in which the metaphysis of the FEMUR moves proximally and anteriorly away from FEMUR HEAD (epiphysis) at the upper GROWTH PLATE. It is most common in male adolescents and is associated with a greater risk of early OSTEOARTHRITIS of the hip.
Measurement of the dimensions and capacity of the pelvis. It includes cephalopelvimetry (measurement of fetal head size in relation to maternal pelvic capacity), a prognostic guide to the management of LABOR, OBSTETRIC associated with disproportion.
General or unspecified injuries involving the hip.
A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.
Synthetic thermoplastics that are tough, flexible, inert, and resistant to chemicals and electrical current. They are often used as biocompatible materials for prostheses and implants.
Products made by baking or firing nonmetallic minerals (clay and similar materials). In making dental restorations or parts of restorations the material is fused porcelain. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Boucher's Clinical Dental Terminology, 4th ed)
The pull on a limb or a part thereof. Skin traction (indirect traction) is applied by using a bandage to pull on the skin and fascia where light traction is required. Skeletal traction (direct traction), however, uses pins or wires inserted through bone and is attached to weights, pulleys, and ropes. (From Blauvelt & Nelson, A Manual of Orthopaedic Terminology, 5th ed)
The distance and direction to which a bone joint can be extended. Range of motion is a function of the condition of the joints, muscles, and connective tissues involved. Joint flexibility can be improved through appropriate MUSCLE STRETCHING EXERCISES.
Adhesives used to fix prosthetic devices to bones and to cement bone to bone in difficult fractures. Synthetic resins are commonly used as cements. A mixture of monocalcium phosphate, monohydrate, alpha-tricalcium phosphate, and calcium carbonate with a sodium phosphate solution is also a useful bone paste.
A vinyl polymer made from ethylene. It can be branched or linear. Branched or low-density polyethylene is tough and pliable but not to the same degree as linear polyethylene. Linear or high-density polyethylene has a greater hardness and tensile strength. Polyethylene is used in a variety of products, including implants and prostheses.
A fracture in which the bone is splintered or crushed. (Dorland, 27th ed)
Procedures used to treat and correct deformities, diseases, and injuries to the MUSCULOSKELETAL SYSTEM, its articulations, and associated structures.
The projecting part on each side of the body, formed by the side of the pelvis and the top portion of the femur.
The space or compartment surrounded by the pelvic girdle (bony pelvis). It is subdivided into the greater pelvis and LESSER PELVIS. The pelvic girdle is formed by the PELVIC BONES and SACRUM.
Aseptic or avascular necrosis of the femoral head. The major types are idiopathic (primary), as a complication of fractures or dislocations, and LEGG-CALVE-PERTHES DISEASE.
The growth action of bone tissue as it assimilates surgically implanted devices or prostheses to be used as either replacement parts (e.g., hip) or as anchors (e.g., endosseous dental implants).
Dissolution of bone that particularly involves the removal or loss of calcium.
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
A dead body, usually a human body.
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
The use of internal devices (metal plates, nails, rods, etc.) to hold the position of a fracture in proper alignment.
The fitting and adjusting of artificial parts of the body. (From Stedman's, 26th ed)
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
Specialized devices used in ORTHOPEDIC SURGERY to repair bone fractures.
Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.
The constricted portion of the thigh bone between the femur head and the trochanters.
Endoscopic examination, therapy and surgery of the joint.
Fractures of the short, constricted portion of the thigh bone between the femur head and the trochanters. It excludes intertrochanteric fractures which are HIP FRACTURES.
A protective layer of firm, flexible cartilage over the articulating ends of bones. It provides a smooth surface for joint movement, protecting the ends of long bones from wear at points of contact.
The properties, processes, and behavior of biological systems under the action of mechanical forces.
A partial or complete return to the normal or proper physiologic activity of an organ or part following disease or trauma.
A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)
Tumors or cancer located in bone tissue or specific BONES.
The physical state of supporting an applied load. This often refers to the weight-bearing bones or joints that support the body's weight, especially those in the spine, hip, knee, and foot.

Long-term results of spherical acetabular osteotomy. (1/945)

We have examined the effect of the Wagner spherical acetabular osteotomy on preserving the joint in 38 hips with a mean follow-up of 17 years. At the time of the initial operation, 55% of patients had clinical symptoms and 30 joints showed minimal or absent radiological signs of osteoarthritis. At follow-up, 54% of patients had a good functional result. The osteotomy improved the mean centre-edge angle from -3 degrees to +15 degrees, the mean anterior centre-edge angle to 23 degrees and the acetabular head index to 75%. The obliquity of the acetabular roof decreased from 28 degrees to 16 degrees. One patient improved, but 14 deteriorated with joint degeneration. Of these, one progressed because of postoperative deep-tissue infection and five due to undercorrection. One patient needed total joint replacement after 14 years. At 17 years after operation, Wagner osteotomy had prevented progression of secondary arthritis in 63% of cases.  (+info)

Non-operative management of acetabular fractures. The use of dynamic stress views. (2/945)

To assess the stability of the hip after acetabular fracture, dynamic fluoroscopic stress views were taken of 41 acetabular fractures that met the criteria for non-operative management. These included roof arcs of 45 degrees, a subchondral CT arc of 10 mm, displacement of less than 50% of the posterior wall, and congruence on the AP and Judet views of the hip. There were three unstable hips which were treated by open reduction and internal fixation. The remaining 38 fractures were treated non-operatively with early mobilisation and delayed weight-bearing. At a mean follow-up of 2.7 years, the results were good or excellent in 91% of the cases. Three fair results were ascribed to the patients' other injuries. Dynamic stress views can identify subtle instability in patients who would normally be considered for non-operative treatment.  (+info)

Open reduction and internal fixation of acetabular fractures. (3/945)

Between 1982 and 1995, 84 patients with displaced acetabular fractures underwent open reduction and internal fixation in our institution. The mean follow-up was 5.5 years with a minimum of 2 years. There were 33 simple and 51 complex fractures according to the classification of Judet and Letournels. Reduction after operation was anatomical in 49% of the patients, satisfactory in 24%, and unsatisfactory in 27%. Using Merle d'Aubigne's scale, the clinical results were excellent in 39% of the patients, good in 29%, fair in 8%, and poor in 24%. Factors of statistical significance associated with a poor clinical outcome were T-shaped fractures, unsatisfactory reduction (> 3 mm residual displacement), age > 40 years and development of avascular necrosis. Acetabular surgery is demanding, and a high rate of complications can be expected. Trauma centres should designate a group of surgeons who will consistently treat these fractures in order to obtain more experience and better results.  (+info)

The influence of weight-bearing on the measurement of polyethylene wear in THA. (4/945)

We have studied the influence of weight-bearing on the measurement of wear of the polyethylene acetabular component in total hip arthroplasty using two techniques. The measured vertical wear was significantly greater when radiographs were taken weight-bearing rather than with the patient supine (p = 0.001, method 1; p = 0.007, method 2). Calculations of rates of linear wear of the acetabular component were significantly underestimated (p < 0.05) when radiographs were taken supine. There are two reasons for this. First, a change in pelvic orientation when bearing weight ensures that the thinnest polyethylene is brought into relief, and secondly, the head of the femoral component assumes the position of maximal displacement along its wear path. Interpretation of previous studies on both linear and volumetric polyethylene wear in total hip arthroplasty should be reassessed in the light of these findings.  (+info)

Accuracy of EBRA-FCA in the measurement of migration of femoral components of total hip replacement. Einzel-Bild-Rontgen-Analyse-femoral component analysis. (5/945)

Several methods of measuring the migration of the femoral component after total hip replacement have been described, but they use different reference lines, and have differing accuracies, some unproven. Statistical comparison of different studies is rarely possible. We report a study of the EBRA-FCA method (femoral component analysis using Einzel-Bild-Rontgen-Analyse) to determine its accuracy using three independent assessments, including a direct comparison with the results of roentgen stereophotogrammetric analysis (RSA). The accuracy of EBRA-FCA was better than +/- 1.5 mm (95% percentile) with a Cronbach's coefficient alpha for interobserver reliability of 0.84; a very good result. The method had a specificity of 100% and a sensitivity of 78% compared with RSA for the detection of migration of over 1 mm. This is accurate enough to assess the stability of a prosthesis within a relatively limited period. The best reference line for downward migration is between the greater trochanter and the shoulder of the stem, as confirmed by two experimental analyses and a computer-assisted design.  (+info)

The prediction of failure of the stem in THR by measurement of early migration using EBRA-FCA. Einzel-Bild-Roentgen-Analyse-femoral component analysis. (6/945)

We report the ten-year results for three designs of stem in 240 total hip replacements, for which subsidence had been measured on plain radiographs at regular intervals. Accurate migration patterns could be determined by the method of Einzel-Bild-Roentgen-Analyse-femoral component analysis (EBRA-FCA) for 158 hips (66%). Of these, 108 stems (68%) remained stable throughout, and five (3%) started to migrate after a median of 54 months. Initial migration of at least 1 mm was seen in 45 stems (29%) during the first two years, but these then became stable. We revised 17 stems for aseptic loosening, and 12 for other reasons. Revision for aseptic loosening could be predicted by EBRA-FCA with a sensitivity of 69%, a specificity of 80%, and an accuracy of 79% by the use of a threshold of subsidence of 1.5 mm during the first two years. Similar observations over a five-year period allowed the long-term outcome to be predicted with an accuracy of 91%. We discuss the importance of four different patterns of subsidence and confirm that the early measurement of migration by a reasonably accurate method can help to predict long-term outcome. Such methods should be used to evaluate new and modified designs of prosthesis.  (+info)

Retroversion of the acetabulum. A cause of hip pain. (7/945)

We describe a little-known variety of hip dysplasia, termed 'acetabular retroversion', in which the alignment of the mouth of the acetabulum does not face the normal anterolateral direction, but inclines more posterolaterally. The condition may be part of a complex dysplasia or a single entity. Other than its retroversion, the acetabulum is sited normally on the side wall of the pelvis, and its articular surface is of normal extent and configuration. The retroverted orientation may give rise to problems of impingement between the femoral neck and anterior acetabular edge. We define the clinical and radiological parameters and discuss pathological changes which may occur in the untreated condition. A technique of management is proposed.  (+info)

Improving the detection of acetabular osteolysis using oblique radiographs. (8/945)

Visualisation of periacetabular osteolysis by standard anteroposterior (AP) radiographs underestimates the extent of bone loss around a metal-backed acetabular component. We have assessed the effectiveness of standard radiological views in depicting periacetabular osteolysis, and recommend additional projections which make these lesions more visible. This was accomplished using a computerised simulation of radiological views and a radiological analysis of simulated defects placed at regular intervals around the perimeter of a cadaver acetabulum. The AP view alone showed only 38% of the defects over all of the surface of the cup and failed to depict a 3 mm lesion over 83% of the cup. When combined with the AP view, additional 45 degree obturator-oblique and iliac-oblique projections increased the depiction, showing 81% of the defects. The addition of the 60 degree obturator-oblique view further improved the visualisation of posterior defects, increasing the rate of detection to 94%. Based on this analysis, we recommend using at least three radiographic views when assessing the presence and extent of acetabular osteolysis.  (+info)

Background: Porous-coated cups have been widely used in acetabular reconstruction after failed treatment of acetabular fractures, and good results have been reported with the use of these cups; however, the durability and functionality of modular trabecular metal (TM) acetabular components in acetabular reconstruction after failed treatment of acetabular fractures remain unclear. This study aimed to examine the radiographic and clinical outcomes associated with the use of modular TM acetabular components for failed treatment of acetabular fractures to assess the durability and functionality of these components in acetabular reconstruction after failed treatment of acetabular fractures. ...
BACKGROUND: Protrusio acetabuli is a rare anatomic pattern of the hip in which the femoral head protrudes into the true pelvis. The increased depth of the hip and the excessive size of the lunate surface typically lead to severe pincer-type femoroacetabular impingement (FAI); however, to our knowledge, there are no published mid- or long-term studies on results of circumferential acetabular rim trimming through a surgical hip dislocation for patients with this condition. QUESTIONS/PURPOSES: (1) What is the 10-year survivorship of the hips treated with circumferential rim trimming through a surgical hip dislocation compared with a control group of hips that underwent surgery for pincer FAI but that did not have protrusio acetabuli? (2) What are the factors that were associated with a decreased likelihood of survivorship in those hips with the following endpoints: total hip arthroplasty, Merle dAubigné score of less than 15, and/or radiographic progression of osteoarthritis (OA)? (3) Does the ...
Background The treatment of mild or borderline acetabular dysplasia is controversial with surgical options including both arthroscopic labral repair with capsular closure or plication and periacetabular osteotomy (PAO). The degree to which improvements in pain and function might be achieved using these approaches may be a function of acetabular morphology and the severity of the dysplasia, but detailed radiographic assessments of acetabular morphology in patients with a lateral center-edge angle (LCEA) of 18° to 25° who have undergone PAO have not, to our knowledge, been performed.. Questions/purposes (1) Do patients with an LCEA of 18° to 25° undergoing PAO have other radiographic features of dysplasia suggestive of abnormal femoral head coverage by the acetabulum? (2) What is the survivorship free from revision surgery, THA, or severe pain (modified Harris hip score [mHHS] , 70) and proportion of complications as defined by the modified Dindo-Clavien severity scale at minimum 2-year ...
The stability of acetabulum reconstructions using reinforcement rings and hooks is important for successful replacement surgery. The objective of this study was to biomechanically determine the effects of the hook on stress and the related micromotions of the acetabular reinforcement ring during the immediate postoperative period. Acetabular reinforcement ring models were developed using a nonlinear, three-dimensional, finite element method. Using a pre-prepared template, we constructed without-hook and bone graft models of varying volumes and material properties. The stress on the inferior margin of the acetabulum was higher in the with-hook model than in the without-hook model, especially with increased bone graft volumes, and the stiffness of the bone graft material was decreased. Relative micromotions in the without-hook model were higher than in the with-hook models. The highest relative micromotion was observed in the model with increased bone graft volume and lower stiffness of bone graft
The acetabulum /æsəˈtæbjʊləm/ (cotyloid cavity) is a concave surface of a pelvis. The head of the femur meets with the pelvis at the acetabulum, forming the hip joint. There are three bones of the os coxae (hip bone) that come together to form the acetabulum. Contributing a little more than two-fifths of the structure is the ischium, which provides lower and side boundaries to the acetabulum. The ilium forms the upper boundary, providing a little less than two-fifths of the structure of the acetabulum. The rest is formed by the pubis, near the midline. It is bounded by a prominent uneven rim, which is thick and strong above, and serves for the attachment of the acetabular labrum, which reduces its opening, and deepens the surface for formation of the hip joint. At the lower part of the acetabulum is the acetabular notch, which is continuous with a circular depression, the acetabular fossa, at the bottom of the cavity of the acetabulum. The rest of the acetabulum is formed by a curved, ...
TY - JOUR. T1 - High-energy Pediatric Pelvic and Acetabular Fractures. AU - Amorosa, Louis F.. AU - Kloen, Peter. AU - Helfet, David L.. PY - 2014/10/1. Y1 - 2014/10/1. N2 - Pediatric pelvic and acetabular fractures are rare injuries. They are almost always the result of a high-energy injury mechanism. A full trauma protocol should be instituted, having a high index of suspicion for associated life-threatening injuries. In the past, it was recommended that almost all of these injuries be treated nonoperatively. However, pelvic and acetabular fractures do not all remodel well. Prospective studies are needed to establish optimal treatment guidelines. Until then, in the presence of instability or significant displacement, operative fixation by a pelvic and acetabular fracture specialist should be considered to allow the best possible outcome.. AB - Pediatric pelvic and acetabular fractures are rare injuries. They are almost always the result of a high-energy injury mechanism. A full trauma protocol ...
Ecker, M.L., 2013: CORR Insights®: restoration of the hip center during THA performed for protrusio acetabuli is associated with better implant survival
MARTIN, Nicolas et al. No loosening of an uncemented acetabular component at a minimum of 15 years. SA orthop. j. [online]. 2012, vol.11, n.2, pp.49-51. ISSN 2309-8309.. One hundred consecutive total hip replacements using a cementless Duraloc 300 cup were reviewed at a minimum of 15 years. All acetabular metal components were found to be stable with no evidence of loosening.. Palavras-chave : Hip; arthroplasty; acetabular; loose; fixation. ...
The acetabular version angle or acetabular anteversion angle is a measurement used on cross-sectional imaging especially pelvic CT for the assessment of acetabular morphology. Usage The acetabular version angle is influenced by pelvic obliquity...
Aim: Treatment of acetabular fractures is very challenging to the orthopedic surgeons who do not have the relevant experience. The present study seeks to evaluate the outcome of the surgical treatment of acetabular fractures and its learning curve . Methods: A cross-sectional interpretative study was conducted on 104 patients with mean age of 33.28 (17-60) undergoing surgery of acetabular fractures with the mean follow-up of 23 months. Data related to postoperative complications, accompanied lesions, radiographic and functional information of the hip were analyzed. To find out the learning curve, the study was divided into two periods: the first two years with 50 patients and the second two years with 54 patients . Results: The mean surgery duration was 91.9 minutes in the first period and 74.62 in the second period (P,0.0001). The mean volume of blood infusion was 1.78 in the first period and 1.4 in the second period (P=0.171). The mean Harris Hip Grade, was 84.3 in the first period and 88.38 ...
Acetabular protrusio (also known as acetabular protrusion) is intrapelvic displacement of the acetabulum and femoral head, so that the femoral head projects medial to the ischioilial line. It should be differentiated from coxa profunda. Patholog...
In revision hip arthroplasty, managing the large protrusio acetabular defects remains a challenge. The report described a novel technique which employs a trabecular metal revision shell as a super-augment to buttress the superior medial structure. Between January 2015 and December 2018, the multicup reconstruction was performed in 21 patients with severe protrusio acetabular defects. The revision shell, plus two similar porous acetabular components was implanted into the initial shell to create a
Inquiry for China Acetabulum reaming drill of Ningbo Boly Medical Equipment Co., Ltd , China Acetabulum reaming drill Suppliers & Manufacturers
Accurate radiographic measurement of acetabular cup orientation is required in order to assess susceptibility to impingement, dislocation, and edge loading wear. In this study, the accuracy and precision of a new radiographic cup orientation measurement system were assessed and compared to those of two commercially available systems. Two types of resurfacing hip prostheses and an uncemented prosthesis were assessed. Radiographic images of each prosthesis were created with the cup set at different, known angles of version and inclination in a measurement jig. The new system was the most accurate and precise and could repeatedly measure version and inclination to within a fraction of a degree. In addition it has a facility to distinguish cup retroversion from anteversion on anteroposterior radiographs.. ...
The Global Acetabular Reinforcements Market Research Report 2020 mainly revolves around the global Acetabular Reinforcements industry size, share, trends, and sales volume, and product demand as these have been considered as the most significant factors in the industry. These factors lead to influence, revenue generation, and economic structure on the regional and global levels. Thus, the report aims to formulate a proficient forecast analysis for these and other influential Acetabular Reinforcements market elements.. The central aim of this Market Research Store report is to present updates and information linked to the Acetabular Reinforcements market in addition to perceive all the avenues for Acetabular Reinforcements market expansion. The report, to begin with, comprises a market summary and offers a definition and synopsis of the Acetabular Reinforcements market. The synopsis section includes Acetabular Reinforcements market dynamics including opportunities, market trends, drivers, and ...
There has been only one prospective study documenting the outcomes of patients treated with physical therapy for intra-articular conditions of the hip. These conditions included mild FAI and mild developmental dysplasia of the hip. Here, physical therapy was given as a first line treatment. Those who did not make satisfactory improvements in pain or wished to have surgery were then scheduled for surgery to repair the defects. Patients saw improvement in validated outcome measures at one year. Although there have been studies looking at age secondarily in patients with labral tears, there is no prospective evidence to endorse or refute a recommendation of hip arthroscopy for patients of any age being treated for a tear of the acetabular labrum. Most recently, the authors involved in this study performed a retrospective investigation (unpublished data) to capture patients with clinically and radiographically confirmed acetabular labral pathology electing to undergo conservative management defined ...
Hip dysplasia is a common cause of hip pain and functional disability in the 20-40 year old adult. It is characterized by a steep shallow acetabulum resulting in an insufficient coverage of the femoral head. The acetabulum can be retroverted. The proximal femur may be anteverted and the proximal femoral head-neck junction can have formation of exostoses as well. The abnormal biomechanics in the hip joint results in overload of the acetabular rim, which can leads to labral damage with cartilage delamination to follow. The proximal bony abnormality of the femur may result in femoroacetabular impingement aggravating the stress to the rim; worsen the labral stress and the cartilage damage. The natural history of symptomatic hip dysplasia is well described in the literature leading to osteoarthritis without treatment. The periacetabular osteotomy (PAO) is a well established joint preserving surgical treatment. The procedure is known to relieve pain, increase hip joint functionality and to prevent or ...
240 labels per pack of Herma Reinforcement Rings Self-Adhesive 12mm White 240 pcs round shaped made up of Polypropylene (PP) available in size 12 mm with permanent adhesive type
A grouting pan assembly includes a reinforcement ring. In another aspect, a grouting pan includes a substantially planar bottom surface and a curved sidewall surrounding the bottom surface. In a further embodiment, a grouting pan assembly includes a grouting pan having a post or mechanical fastener extending from a backside thereof for attachment to a reinforcing ring or layer.
The REFLECTION Acetabular Cup System has several options including no hole, spiked shell, three hole, Multihole, and peripheral hole acetabular cup systems for hip replacement. The REFLECTION Acetabular Cup System has led the industry in maximizing fixation and minimizing wear since 1992. Read more about REFLECTION here.
Van Ladesteijn , R , Leslie , H , Manning , W A , Holland , J P , Deeham , D J , Pandorf , T & Aspden , R M 2018 , Mechanical properties of cancellous bone from the acetabulum in relation to acetabular shell fixation and compared with the corresponding femoral head , Medical Engineering & Physics , vol. 53 , pp. 75-81 . ...
Os acetabuli is an unfused secondary ossification centers of the acetabulum. Gross anatomy Ossa acetabuli are located at the anterosuperior margin. They are rounded in shape with a concave lateral border and convex medial border. They may be bi...
An alignment system for aligning an acetabular cup insertion instrument utilizes pre-operative preferably standing x-rays and intra-operative x-rays to allow the surgeon to compensate for the position of a patient on an operating room table. The system uses a programmable computer connected to a digital x-ray system and an navigation tracking system to provide input for calculating the inclination and anteversion angles of an acetabular cup impactor based on a pre-operative plan developed from the standing x-rays. The system calculates changes in lengths and angles between anatomic landmarks on the pelvis to alter the intra-operative orientation of the acetabular reaming and impacting instruments to produce the desired inclination and anteversion angles when the pelvis is reoriented as the patient is placed on an operating table.
The advent of computed tomography and development of three-dimensional (3-D) reconstructions has allowed for profound advances in the understanding of complex acetabular fractures. The authors sought to determine the impact of 3-D reconstructions on understanding of the morphology of these injuries. A survey of 20 fellowship-trained orthopaedic trauma surgeons was undertaken to assess the utility of these reconstructions on understanding three complex posterior acetabulum fractures. Respondents noted significantly better understanding of posterior wall and transverse-posterior wall fracture patterns compared to a posterior column-posterior wall pattern when utilizing two-dimensional imaging only. The respondents understanding of all three patterns was improved with the addition of 3-D reconstructions. With regards to individual images, posterior iliac oblique reconstructions obtained at 36-degree and 54-degree from posterior were reported to be most helpful in improving understanding of ...
Acetabular Dysplasia treatment, etiology, epidemiology, natural history, anatomy, symptoms, xrays, classification, complications and references.
Advances in Orthopedic Surgery is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies in all areas of orthopedic surgery.
Definition of Acetabular notch in the Financial Dictionary - by Free online English dictionary and encyclopedia. What is Acetabular notch? Meaning of Acetabular notch as a finance term. What does Acetabular notch mean in finance?
Detailed step by step desription of Anterior column screw fixation for Spontaneous acetabular fracture located in our module on Hip periprosthetic fractures
Background and purpose: Considerable migration of the acetabular cup is required for diagnosis of loosening by conventional radiography. We have developed a new clinically applicable method for assessment of cup loosening using computed tomography (CT). Patients and methods 10 patients scheduled for revision hip replacement due to suspected wear or loosening were scanned twice with CT under torsion loading of the prosthesis. Two independent examiners assessed each patient with respect to motion of the acetabular cup relative to the pelvis using CT volume registration. The CT measurements were compared to findings at revision surgery. Results The method was applicable in 8 of the 10 patients. 1 patient had a severe tremor. In 1 patient, surgery revealed that the hip was ankylotic due to massive ectopic bone formation. This left 8 patients that could be evaluated. 4 cups were loose at surgery, and 3 of these cups could be seen to be mobile by CT. 4 cups that were stable on revision were accurately ...
Abstract Screw penetration of the hip joint following acetabular fracture reconstruction is a relatively uncommon complication but, if not corrected, may have a catastrophic effect..
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Author: Warren Hammer. Title: The Iliopsoas: A Possible Cause of Acetabular Labrum Tear. Summary: An anatomic study that appeared recently in the American Journal of Sports Medicine1 identified for the first time the cross-sectional...
A modular acetabular reinforcement system includes a substantially cup-shaped reinforcement body having a peripheral flange portion. One or more fixation wings, of various sizes and shapes, are selectively and separately attachable to the flange portion of the reinforcement body. The system is mountable within the acetabulum of a patient to reinforce the acetabulum and to serve as a platform for other prosthesis components such as an acetabular shell.
Background: The hip essentially represents the major weight-bearing joint of the human organism. It is conspicuously characterized by its mobility and complex origination, specific organization and development. The anatomic structures referred to as acetabulum and femoral head arise from the same primitive mesenchymal cells and, by the end of the 11th week of gestation, the hip joint becomes fully formed and continues to develop throughout intrauterine life. During embryonic life, the femoral head grows at a faster rate than the acetabulum, and at the end of gestation the femoral head is approximately less than 50% covered, and after birth, the growth rate of the acetabular cartilage surpasses that of femoral head thus resulting in progressively increased coverage. Methods: Cartilaginous at birth, the ossification of acetabulum is set at around a three-month age period, while ossification centers of the proximal femur start to appear at 4 to 7
An acetabular cup comprising a shell having inner and outer ends, a cavity having an outer opening at the outer end, a surface defining an inner opening at the inner end and external screw threads for threading the shell into the acetabulum and an insert having an external polar cap and a concave bearing surface of generally part spherical configuration opening at a mouth. The insert is adapted to receive a femoral head and has an overhang to reduce the likelihood of dislocation. The insert is receivable in the shell with the polar cap being received in the inner opening of the shell. Interlocking teeth on the surface of the shell and on the polar cap of the insert hold the insert in any of a plurality of different angular positions relative to the shell so that the desired angular orientation of the overhang can be obtained.
A prosthetic acetabular cup assembly includes a single piece bearing component having an inner bearing surface for receiving a ball attached to a femoral prosthesis and an outer surface. The assembly also includes a shell component for attachment to an acetabulum to replace a natural hip socket includes an inner surface defining a cavity for receiving the bearing component therein. The inner surface of the shell component is formed to include an arcuate groove therein. A formed wire is situated in the arcuate groove of the shell component. The wire is configured so that a portion of the wire extends radially inwardly from the arcuate groove of the shell component to engage an arcuate groove formed in the bearing component to retain the bearing component inside the shell component. Anti-rotation lugs are formed on the inner surface of the shell component to cut into the outer surface of the bearing component as the bearing component is inserted into the shell component to prevent rotation of the bearing
TY - JOUR. T1 - Fracture of an acetabular component inserted without cement. A case report. AU - Trousdale, R. T.. AU - Berry, D. J.. AU - Jacobs, J.. AU - Gilbert, J. L.. PY - 1997/6. Y1 - 1997/6. UR - UR - U2 - 10.2106/00004623-199706000-00015. DO - 10.2106/00004623-199706000-00015. M3 - Article. C2 - 9199389. AN - SCOPUS:0030914445. VL - 79. SP - 901. EP - 905. JO - Journal of Bone and Joint Surgery - Series A. JF - Journal of Bone and Joint Surgery - Series A. SN - 0021-9355. IS - 6. ER - ...
Asheesh Bedi, MD (Ann Arbor, MI), demonstrates a tensionable knotless acetabular repair technique using the Knotless 1.8 Hip FiberTak® soft anchor and SwiftStitch™ suture passer. In this cadaveric demonstration, he showcases this soft anchors ability to appropriately tension the labrum against the acetabulum for an anatomic labral repair.. ...
The ultrasound images are in the coronal plane (figure).. As a consequence the Graf classification of hip dysplasia is mainly based on the morphology of the iliac bone, where we look at the shape of the acetabulum, the bony and cartilaginous acetabular rim, labrum and position of the femoral head.. Since ultrasound has the advantage of also displaying the cartilagenous structures, we can also look at the coverage of the femoral head by the cartilage of the acetabulum and the labrum.. ...
Purpose of the study : Our study aims to compare and study the relation between the Matta scoring system and SF 36 system in assessing the functional outcome of operated acetabular fractures .. Methods : This study was conducted between June 2012 to December 2014 .44 patients (between 2012 and 2014) with a mean age of 42.9(+ 3.2)years who were operated for acetabular fractures were selected and followed for a period of 1 year. MCS and PCS components of SF 36 scoring and the functional outcome score of Matta were compared for all these patients. Co-relation was assessed using Pearsons co-efficient.. Results : There was weak correlation and negative correlation respectively while comparing the Functional outcome score of Matta with the PCS (R2 =0.084) and MCS(R2=0.011) component of SF 36 system.. Conclusion :. We conclude that there is a poor relation between Matta scoring and SF 36 system in assessing the functional outcome pertaining to operated acetabular fractures. More parameters are ...
3D Surgical planning has become a key tool in complex hip revision surgery. The restoration of centre of rotation (CoR) of the hips and leg length (LL) are key factors in achieving good clinical outcome. Pelvic imaging is the gold standard for planning and assessment of LL. We aimed to better understand if 3D planning is effective at equalising LL when large acetabular defects are present. This was a prospective case study of 25 patients. We report the analysis of pre-operative LL status and planned LL restoration measured on CT, in relation to the achieved LL measured post-operatively in functional, weight bearing position. Our primary objective was the assessment of restoration of CoR as well as the anatomical and functional LL using biplanar full-length standing low-dose radiographs; our secondary objective was to evaluate the clinical outcome. Pre-operative intra-pelvic discrepancy between right and left leg was a mean of 28 mm (SD 17.99, min = 3, max = 60 mm). Post-operatively, the difference
3D Surgical planning has become a key tool in complex hip revision surgery. The restoration of centre of rotation (CoR) of the hips and leg length (LL) are key factors in achieving good clinical outcome. Pelvic imaging is the gold standard for planning and assessment of LL. We aimed to better understand if 3D planning is effective at equalising LL when large acetabular defects are present. This was a prospective case study of 25 patients. We report the analysis of pre-operative LL status and planned LL restoration measured on CT, in relation to the achieved LL measured post-operatively in functional, weight bearing position. Our primary objective was the assessment of restoration of CoR as well as the anatomical and functional LL using biplanar full-length standing low-dose radiographs; our secondary objective was to evaluate the clinical outcome. Pre-operative intra-pelvic discrepancy between right and left leg was a mean of 28 mm (SD 17.99, min = 3, max = 60 mm). Post-operatively, the difference
Usually caused by force applied to the femur which is translated to the acetabulum. In young adults, acetabular fractures are due to high energy injuries,
return-to-work; employment; fractures of the pelvis; fractures of the acetabulum; rehabilitation statistics database; QUALITY-OF-LIFE; RING FRACTURES; EPIDEMIOLOGY; ...
Conversion chart for acetabulum (small cup) (Ancient Roman Measure (Liquid and Dry), historical units of volume). Instant units and measurements conversion for ancient, medieval and historical units.
S32.401G is a billable diagnosis code used to specify a medical diagnosis of unspecified fracture of right acetabulum, subsequent encounter for fracture with delayed healing. Code valid for the fiscal year 2021
GROBLER, GP; DOWER, BJ; NORTJE, MB e WALTERS, J. The results of a cementless acetabular component combined with impaction bone grafting in patients with acetabular protrusion. SA orthop. j. [online]. 2012, vol.11, n.3, pp.29-33. ISSN 2309-8309.. We undertook this study to determine the results of acetabular fixation using the Duraloc 300 uncemented acetabular component combined with impaction bone grafting in patients with acetabular protrusion. Forty-two consecutive total hip replacements using a Duraloc 300 cup in patients with acetabular protrusion requiring impaction bone grafting were reviewed at an average of 6.3 years. In no cases were structural graft, wire mesh or cages utilised. Pre-operative X-rays were analysed for degree of protrusion. Post-operative X-rays were analysed for cup placement including centre of rotation and interface gaps. Follow-up films were analysed for graft incorporation, lucent lines, osteolysis, wear and migration. Kaplan-Meier survivorship analysis was ...
Hip contact stress is considered to be an important biomechanical factor related to development of coxarthrosis. The effect of the lateral coverage of the acetabulum on the hip contact stress has been demonstrated in several studies of hip dysplasia, whereas the effect of the anterior anteversion remains unclear. Therefore, the joint hip contact stress during normal level walking and staircase walking, in normal and dysplastic hips, for small and large acetabular anteversion angle was computed. For small acetabular anteversion angle, the hip contact stress is slightly increased (less than 15%) in staircase walking when compared with normal walking. In hips with large angle of acetabular anteversion, walking downstairs significantly increases the maximal peak contact stress (70% in normal hips and 115% in dysplastic hips) whereas walking upstairs decreases the peak contact stress (4% in normal hips and 34% in dysplastic hips) in comparison to normal walking. Based on the presented results, we ...
Fractures of the acetabulum are rare in the pediatric age and may be complicated by the premature closure of the triradiate cartilage. We report a case of triradiate cartilage displaced fracture treated surgically. A 14 years old boy, following a high-energy road trauma, presented an hematoma in the right gluteal region with severe pain. According to radiographic Judets projections was highlighted a diastasis of the right acetabular triradiate cartilage. CT scan study with 2D-3D reconstructions confirmed as type 1 Salter-Harris epiphyseal fracture. Due to the huge diastasis of the triradiate cartilage, the patient was operated after 72 hours through a plating osteosynthesis. We decided during the preoperative study that the plates should not be removed. Two years after surgery, the patient is clinically asymptomatic; the radiographic evaluation shows a complete cartilages fusion and the right acetabulum is perfectly symmetrical to the contralateral. For the treatment of acetabular fractures in ...
This prospective study addresses early results of the treatment of acute acetabular fractures in elderly patients by total hip arthroplasty and cerclage wiring. Fifteen patients with an average age of 81 years were treated at our institution between February 1998 and December 2000. There were two transverse fractures, eight T-shaped fractures, two transverse fractures with associated posterior wall fracture, two posterior column fractures with associated posterior wall fracture, and one fracture of both columns. Treatment consisted of cerclage wiring of the fracture and primary non-cemented total hip replacement. All of the patients were followed for a mean of 36 months. Although there was one patient with three hip dislocations during the first 10 months after the operation, we found an excellent or good result for the entire group. During this relatively short follow-up period, we have not found a radiological loss of fracture reduction of more than 1 mm or a cup migration of more than 3.2 mm. ...
Preoperative management of acetabular fracture is a major problem and no consensus has been reached in literature on the optimal treatment of this problem. We present the results of the First Italian Consensus Conference on Acetabular fracture. An extensive review of the literature has been undertaken by the organizing committee and forwarded to the panel. Members were appointed by surgical experience with acetabular fractures. From November 2017 to January 2018, the organizing committee undertook the critical revision and prepared the presentation to the Panel on the day of the Conference. Then 11 recommendations were presented according to the 11 submitted questions. The Panel voted the recommendations after discussion and amendments with the audience. Later on, a second debate took place in September 2018 to reach a unanimous consent. We present results of the following questions: does hip dislocation require reduction? Should hip reduction be performed as soon as possible? In case of unsuccessful
The aim of this study is to explore the method and clinical outcome of posterior trochanteric osteotomy in acetabular fractures. From January 2000 to January 2008, 32 cases of acetabular fractures involving the dome of acetabulum underwent posterior trochanteric osteotomy for a better exposure and internal fixation with acetabular tridimensional memory fixation system. 28 cases (16 men and 12 women, mean age 39.9 years, range 16-73 years) were followed up with an average of 48.9 months (range of 19-95 months) and four were lost during follow up. Of 28 cases, 19 were fresh fractures and 9 were old fractures. The reduction was evaluated with Matta criteria. Clinical evaluation was based on modified Merle dAubigne and Postel scoring. Motor strength of the abductors was evaluated according to the Medical Research Council grading system. Ectopic ossification was classified according to Brooker criteria. Anatomical reduction was achieved in 17 cases and satisfied reduction in 10 patients. Poor reduction
Open surgical fixation was performed on four hip joints in three dogs who were suffering from caudoventral hip luxations for which closed reduction had previously failed. Stabilization of the joint was achieved with a ventral coxofemoral approach, which augmented the function of the transverse acetabular ligament using a sling implant through a bone tunnel (n = 1), a sling implant around two pelvic screws (n = 1), or an internal fixator plate (n = 2). Transverse acetabular ligament augmentation resulted in successful joint stabilization in all cases, and should be considered for the surgical reduction of caudoventral hip luxations in dogs. The use of an internal fixator plate, while preserving soft-tissue blood supply and resulting in minimal to no long-term arthritic changes, may provide an optimal outcome. ...
A periacetabular osteotomy (PAO) is the preferred joint preserving treatment for young adults with symptomatic hip dysplasia and no osteoarthritis. In symptomatic dysplasia of the hip, there is labral pathology in up to 90% of cases. However, no consensus exists as to whether a labral tear should be treated before the periacetabular osteotomy (PAO), treated simultaneously with the PAO, or left alone and only treated if symptoms persist after the PAO. This review is an update of aspects of labral anatomy and function, the etiology of labral tears in hip dysplasia, and diagnostic assessment of labral tears, and we discuss treatment strategies for coexisting labral tears and hip dysplasia ...
BACKGROUND AND PURPOSE: Most patients with femoroacetabular impingement (FAI) have a cam deformity, which may be quantified by measuring the alpha angle and anterior offset ratio (AOR). Knowledge of what constitutes a normal alpha angle and AOR is limited. We defined the reference intervals of these measurements from normal hips in the general population. PATIENTS AND METHODS: 157 individuals from the general population were reviewed clinically and radiographically. 74 individuals with clinical evidence of hip disease or radiographic evidence of osteoarthritis (OA) were excluded, leaving a study group of 83 individuals (mean age 46 (22-69) years, 44 females) with normal hips. The alpha angles and AORs were measured from cross-table lateral radiographs taken in 15 degrees internal rotation. A validation study consisting of a cadaver study and a measurement reliability study was also performed. RESULTS: The mean alpha angle was 48 degrees in men and 47 degrees in women. The mean AOR was 0.19, the same
TY - JOUR. T1 - Morphologic features of the acetabulum and femur. T2 - Anteversion angle and implant positioning. AU - Maruyama, Masaaki. AU - Feinberg, Judy R.. AU - Capello, William N.. AU - DAntonio, James A.. PY - 2001/1/1. Y1 - 2001/1/1. N2 - Morphologic features of the hips, in particular those features germane to determination of acetabular and femoral anteversion angles and femoral head offset, were studied in 50 male and 50 female human skeletons with bilateral normal joints. Four distinct configurations were identified relative to the anterior acetabular ridge. The majority (121, 60.5%) were curved; 51 (25.5%) were angular; 19 (9.5%) were irregular; and nine (4.5%) were straight. The acetabular anteversion angle measured 19.9° ± 6.6° (range, 7°-42°) and was significantly larger in females (21.3° ± 7.1°) versus males (18.5° ± 5.8°). The notch acetabular angle, which can be identified easily intraoperatively, was defined as the angle created at the intersection of a line from ...
The purpose of this study was to determine the natural history of calcium sulfate pellets implanted during acetabular fracture surgery. The study group consisted of patients sustaining an acetabular fracture with intraarticular comminution or marginal impaction or both in whom calcium sulfate pellet
Find the best osteotomy acetabulum doctors in Navi Mumbai. Get guidance from medical experts to select osteotomy acetabulum specialist in Navi Mumbai from trusted hospitals -
The size and shape of the acetabulum and of the femoral head influence the injury tolerance of the hip joint. The aim of this study is to quantify changes in acetabular cup geometry that occur with age, gender, height, and weight. Anonymized computed tomography (CT) scans of 1,150 individuals 16+ years of age, both with and without hip trauma, were used to describe the acetabular rim with 100 equally spaced points. Bilateral measurements were taken on uninjured patients, while only the uninjured side was valuated in those with hip trauma. Multinomial logistic regression found that after controlling for age, height, weight, and gender, each 1 degree decrease in acetabular anteversion angle (AAA) corresponded to an 8 percent increase in fracture likelihood (p≺0.001). Age, weight, and gender were found to influence anteversion angle significantly, with each 10 years in age increasing AAA by 1.07 degrees, each 10 kg of weight decreasing AAA by 0.45 degrees, and being female resulting in 1.42 ...
Lin Wang1-2, Gregory Pryce2, Mazen Al Hajjar1-2, Sophie Williams2, Jonathan Thompson1-2. 1 DePuy Synthes Joint Reconstruction, Leeds, United Kingdom. 2 Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, United Kingdom. Keywords: acetabular cup positioning, impingement, edge contact, PINNACLE®, computational simulation.. INTRODUCTION. Surgical positioning plays a key role in the function and durability of an artificial hip joint. Preclinical numerical investigations have been conducted to evaluate the effects of various acetabular cup inclination and anteversion angles on the risk of impingement [1]and edge contact[2], which could lead to implant dislocation and accelerated wear.. METHOD. A rigid geometrical model[1] that can predict occurrence and location of impingement was developed in SOLIDWORKDS (Dassault Systèmes, France), consisting of the right hemi-pelvis and femur bone geometry, PINNACLE® Shell with MARATHON® Neutral Liner ...
BACKGROUND: Cam deformities cause femoroacetabular impingement and damage the acetabular labral-chondral complex. The aims of this study were to investigate the potential of delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) to detect cartilage disease in asymptomatic hips with cam deformities compared with morphologically normal hips, establish whether dGEMRIC could identify advanced disease in hips with positive clinical findings, and establish whether cartilage damage correlated with the severity of the cam deformity. METHODS: Subjects were recruited from a prospective study of individuals with a family history of osteoarthritis and their spouses who served as control subjects. Their symptoms and impingement test results were recorded. Asymptomatic hips with normal radiographic joint-space width were placed in a subgroup according to the presence of a cam deformity and the impingement test result. dGEMRIC was performed on a 3-T system, studying two regions of interest: the
THA in the patient with hip dysplasia typically involves acetabular and femoral reconstruction. The acetabulum is traditionally replaced using cemented sockets, but this method has been associated with poor long-term outcomes. Some surgeons, including Dr. Trousdale, prefer uncemented sockets for THA.. For all hip dysplasia patients, Dr. Trousdale recommends putting the cup in the native acetabular position, rather than the position dictated by the patients bone deficiency. He also uses supplemental screws to keep the implanted socket in place, especially in patients with a deficient acetabulum.. For patients who have a lateral bone deficiency, Dr. Trousdale advises medializing the hip center to the medial wall and accepting some lateral uncoverage (~1.5 cm of the socket) and a slight elevation of the hip center. Importantly, he recommends using a bone autograft only in young patients with severe deformity.. If femoral reconstruction is needed, the most appropriate femoral implant should be ...
Looking for online definition of acetabular in the Medical Dictionary? acetabular explanation free. What is acetabular? Meaning of acetabular medical term. What does acetabular mean?
This is a fibrous continuation of the acetabular labrum that is completely collagenous and contains no chondrocytes or cartilage. It crosses the acetabular notch and binds the ends of the cartilaginous labrum. As it crosses the notch it leaves a small gap between it and the rim of the acetabulum that allows vessels to access the joint ...
There are situations which the tomographic exam is done on the affected hip or situations where the contralateral hip presents abnormalities that make it impossible to compare. In this study we aimed to evaluate a tomographic index that does not require comparison between the both hips. Twenty two patients with unilateral acetabular fracture dislocation with fracture of posterior wall were studied. We established the relationship between the remaining posterior wall and the femoral head diameter (head/wall index-H/W index). We evaluated 45 two-dimensional computed tomography scan in normal hips and established the H/W index. In 45 normal hips we simulated a posterior wall fracture with involvement of 25% and 30% of the posterior wall and calculated the H/W index. We divided into five groups with five different H/W index (fractured group with non surgical treatment; fractured group; normal group; normal group with simulated fracture of 25% and; 30% of the posterior wall). 2.4 was the lowest limit of
Impaction grafting is controversial in the presence of segmental and cavitary acetabular defects and requires the use of supplemental devices to close segmental defects. This approach, however, would allow treating combined deficiencies that could not be managed with impacted cancellous bone alone. We raised the following two questions: (1) What is the survival rate in patients with combined deficiencies reconstructed with metal mesh, impaction grafting and a cemented cup and (2) can metal mesh prevent cup migration? We evaluated 23 cavitary uncontained acetabular defects in revision hip arthroplasty. Preoperative diagnoses were aseptic loosening (19 hips) and second-stage reimplantations after resection for infection (four hips). The preoperative Merle DAubigné-Postel score averaged 7.4 points. Two patients had reoperations for mechanical failure at 6 and 24 months. The survival rate with further revision as an end point was 90.8% at an average of 36 months (range, 24-56 months; 95% ...
A prosthetic cement spacer for controlling the thickness of cement applied between a prosthetic insert and a support member, such as an acetabulum, includes a generally cylindrical standoff body portion fabricated from acrylic bone cement and a pointed wire concentric with said standoff body and outwardly extending from one end a sufficient length to anchor into the acetabulum bone surface. The method of use of these prosthetic cement spacers involves preparation of the acetabulum so that there is sufficient clearance space for the prosthetic cement spacers and then to insert the pointed wires into the acetabulum bone surface in an equilateral triangular arrangement thereby providing three points of contact for the prosthetic insert, such as an acetabular cup. By selecting three prosthetic cement spacers all having substantially the same standoff body height, the clearance region between the acetabulum bone surface and the acetabular cup is controlled and provides a uniform cement thickness
The hip joint is formed by the head of the femur (thigh bone) and the acetabulum of the pelvis (a concave dome shaped area in the pelvic bone). The labrum is also involved; it is a rim of cartilage around the acetabulum which deepens the joint to increase stability and suctions the femoral head in to seal and protect the joint. The hip joint is a ball and socket type joint, so allows a wide range of movement to occur. It is given stability by muscles and ligaments which surround the joint and tighten at end range of movement.. Femoroacetabular impingement (FAI) occurs when the neck of the femur (the top part of the femur, just below the head) butts up against the acetabular rim, and can be caused by two types of impingement. CAM impingement occurs when there is a structural abnormality of the femur, with excess bone at the femur head-neck junction. Pincer impingement occurs when there is an abnormality of the acetabulum and excess bone. Both cause damage to occur to the labrum (it is a common ...
Selections from our library of case studies show patients treated for a diverse spectrum of hip diseases and Dr. Clohisys approach to treatment.
PAO or sometimes called a Ganz Osteotomy. Periacetabular means around the acetabulum.Osteotomy means to cut bone. PAO cuts the bone around the hip socket (acetabulum). Once the acetabulum is detached from the rest of the pelvis by a series of carefully controlled cuts, it is rotated to a position of ideal coverage as dictated by the specific acetabulums unique anatomy. The dysplastic roof that incompletely covers the femoral head is brought over the head to give the head a normal coverage and also brings the roof from an oblique to a horizontal position. The results of the PAO is variable and is usually dependent on the amount of arthritis. The goal of the PAO is to preserve the patients existing hip and normalize the acetabulum for improving the results of a later hip replacement if needed. The success rate as defined as Excellent (normal hip function) to Good (some pain with vigorous activities) is around 75%. Poor results (pain requiring further surgery) is approximately 10%. However, ...
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The incidence of HO around elbow joint is estimated to be 3% after local trauma or dislocation4 and increases up to 15-50% when dislocation is combined with fracture, and to >50% in fractures involving the radial head.4 The incidence of HO in patients undergoing acetabular fracture fixation varies depending upon what approach is used, associated injuries, open fracture and can be as high 90%.2,5-7 Unfortunately, HO is detectable on radiographs as late as 4-12 weeks after injury when no efficient therapy is available. Almost 30% of all patients presenting with HO will develop symptoms, including pain and restricted motion that may require secondary surgical procedures.8 Surgical excision is the treatment of choice for pre-existing HO, but recurrence rates can be as high as 80-100%.Therefore, prophylaxis with radiotherapy (RT) or non-steroidal anti-inflammatory drugs (NSAIDS) is the mainstay of treatment. The effectiveness of both prophylactic therapies has been extensively studied, but no ...
Acetabular bone loss is a challenge in revision total hip arthroplasty. Superior rim loss or an uncontained cavitary defect often is present with either an intact medial wall or an intact rim of bone on the medial wall of the acetabulum. A study in scientific exhibit 61 reviews 12 cases over an eight-year period which used a technique to medialize the acetabular cup for added rim support on host bone. Ten women and two men presented between 1991 and 1998 with bone loss of the superior rim and migration of the cup where the medial wall either had been intact or a rim of bone existed along the medial wall below the cavitary uncontained superior defect. These patients were revised by medializing a larger acetabular component to transfer load through the medial wall more in line with the center of the articulating femoral head. The technique included reaming to the medial wall below the superior bone defect. Then the wall was osteotomized to create a disk of bone still attached to intrapelvic ...
San Francisco Orthopaedic Surgery, Dr. Nicholas Mast, utilizes the latest techniques in his practice of orthopaedics, including Periacetabular Osteotomy
The outcome of primary cemented total hip arthroplasty in young patients under 50-years implanted at our Department shows promising long-term prosthesis survival rates. However, many young patients have already an acetabular bone stock deficiency at surgery and they are the more demanding hips. In case of acetabular deficiency, these defects are reconstructed with impacted bone-grafts. Total hip arthroplasty with impacted bone grafts showed a tendency to even better long-term survival rates than hip arthroplasty without acetabular bone reconstruction, which is remarkable. Insight into the level of activity is necessary to determine if these good results are related to lower activity levels in the acetabular reconstruction group or related to the acetabular bone-grafting technique ...
Femoroacetabular impingement is a condition with the ball (femur) and socket (acetabulum) of the hip joint. There are two types: cam and pincer impingement.
TY - JOUR. T1 - Incidence of ceramic liner malseating in trident ® acetabular shell AU - Miller, Anna N.. AU - Su, Edwin P.. AU - Bostrom, Mathias P.G.. AU - Nestor, Bryan J.. AU - Padgett, Douglas E.. PY - 2009/6. Y1 - 2009/6. N2 - The low wear rates associated with ceramic hip articulations have made them a popular bearing for younger patients. Although few complications have been observed, one report revealed several instances of incomplete seating of the ceramic liner in the metallic shell. We performed a cohort study of consecutive THAs using a ceramic-ceramic bearing. Radiographic analysis showed 50 (7.2%) of the group of 694 hips had evidence of incomplete seating of the liner in the metallic shell. Although we observed no adverse effects at 6 to 12 weeks, we encourage surgeons to carefully assess liner placement in the metal shell at the time of surgery to avoid this unintended consequence and to assess placement at the time of followup so patients can be properly followed when ...
Purpose The purpose of this study was to describe the anatomy as seen arthroscopically, the role of the labrum and its relevance in luxation and reduction procedures, and secondary changes to the cartilaginous acetabular roof and to determine the main obstacles preventing reduction of dislocated hips in infants and young children. Methods A specialized pediatric medial approach to hip arthroscopy was performed on 25 hip joints in 21 patients younger than 4 years of age. The arthroscopic procedure was conducted using a 2.7-mm cannulated instrument. A subadductor portal was used for the 70° arthroscope, and a high anterolateral portal served as a working portal. The anatomic findings of the individual hip joints were recorded. We examined the femoral head, the teres ligament, the transverse ligament, the acetabulum, and the acetabular labrum. The obstacles preventing reduction were successively resected. Results An arthroscopic investigation of all major structures and arthroscopic reduction was possible
An acetabular prosthesis having an outer member for engaging the acetabulum. The outer member has a part-spherical bearing surface terminating in a distal rim. The rim has a contour such that the portion thereof to be located between the ischium and the pubis extends distally further from an equator of the bearing surface than the contour to be implanted between the pubis and the illium and between the ischium and the illium.
Mathematical model and illustrative cases for c-arm tilts effect on intraoperative fluoroscopy images of acetabular components in direct anterior hip arthroplasty
Dr. Chirag Patel is the Best Orthopaedic Surgeon in Surat with an extraordinary record in correcting the Impingement problems with Femoroacetabular Impingement Surgery.

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