BACKGROUND: Although shoulder arthroplasty is an accepted treatment for osteoarthritis, loosening of the glenoid component, which mainly occurs at the bone-cement interface, remains a major concern. Presently, the mechanical effect of the cement mantel thickness on the bone-cement interface is still unclear. METHODS: Finite element analysis of a prosthetic scapula was used to evaluate the effect of cement thickness on stresses and micromotions at the bone-cement interface. The glenoid component was all-polyethylene, keeled and flat back. Cement mantel thickness was gradually increased from 0.5 to 2.0 mm. Two glenohumeral contact forces were applied: concentric and eccentric. Two extreme cases were considered for the bone-cement interface: bonded and debonded. FINDINGS: Within cement, stress increased as cement thickness decreased, reaching the fatigue limit below 1.0 mm. Bone stress was below its ultimate strength and was minimum between 1.0 and 1.5mm. Interface stress was close to the interface
A bone cement mixer having a cartridge filled with bone cement powder and a monomer well for receiving monomer liquid to be flowed into the bone cement powder. The monomer liquid flows by gravity in a stream near the outer periphery of the bone cement powder. The stream penetrates the bone cement powder and forms a partial cylinder of monomer-rich powder essentially uniformly along the height of the bone cement powder. The powder and liquid are then mechanically mixed to form bone cement.
Bone cement has been successfully used to anchor artificial joints. The bone cement delivery system is a series of medical equipment that uses bone cement for treatment. Scope of the Report: Bone cement has been successfully used to anchor artificial joints. The bone cement delivery system is a series of medical equipment that uses bone cement for treatment. Bone cement delivery systems have become popular in various types of orthopedic surgery/surgery. There are many benefits to using this device,
Bone Cement Market 2018 Global Analysis, Growth, Trends and Opportunities Research Report Forecasting to 2023. PUNE, MAHARASHTRA, INDIA, February 13, 2018 /EINPresswire.com/ - Summary. WiseGuyReports.com adds "Bone Cement Market 2018 Global Analysis, Growth, Trends and Opportunities Research Report Forecasting to 2023" reports to its database.. This report provides in depth study of "Bone Cement Market" using SWOT analysis i.e. Strength, Weakness, Opportunities and Threat to the organization. The Bone Cement Market report also provides an in-depth survey of key players in the market which is based on the various objectives of an organization such as profiling, the product outline, the quantity of production, required raw material, and the financial health of the organization.. Bone cement is used for fixation of prosthesis to living bone in orthopaedic musculoskeletal surgical procedures. Commonly referred to as PMMA (polymethylmethacrylate)In this report, 1 pcs bone cement refers to2 main ...
To prevent complication caused by leakage of bone cement injected into the vertebral body, organism damage caused by the leakage of the monomer or a non-cured component from bone cement and decrease of strength caused by insufficient curing of bone cement, in the percutaneous kyphoplasty, a leakage prevention bag for injecting and filling a bone cement is used, wherein the bad is made of a bioabsorbable material having a molecular weight of 5,000 to 500,000 and has a bag having the thickness of 10 to 800 μm, an injection tube is attached to an injection port for injecting the bone cement of the bag, the bag is inserted into a cavity formed in the vertebra body, and the bone cement is injected and filled into the bag through the tube.
Headline: Bitcoin & Blockchain Searches Exceed Trump! Blockchain Stocks Are Next!. United States Bone Cement Gun Market Production, Supply, Sales, and Demand Research Report is a systematically conducted exhaustive study of the United States Bone Cement Gun market. The aim of the United States Bone Cement Gun Industry report is to assist novice as well as seeded players in gaining astute business intelligence and make apt decisions based on it.. Detailed TOC and Charts & Tables of United States Bone Cement Gun Market Research Report available at- http://www.absolutereports.com/10428770 The analysis in the United States Bone Cement Gun Market report is of a two-fold perspective, production and sales. This commercial study encompasses detailed investigation of production, supply, sales, demand, price, cost, income and revenue on United States Bone Cement Gun Industry in Major Regions.. The report analyses the entire production and supply chain of the industry and provides information as per ...
The fracture or failure behaviours of four commercial acrylic-based bone cements have been examined in tensile, bending and compression modes, and their mechanical properties are reviewed. It was found that Palacos R-40 bone cement had high radiopaque agent concentration, with high surface hardness. It exhibited a much lower bending strength and bending modulus compared with the other three bone cements (CMW1, CMW2000 and Simplex P). The textures of tensile fracture surfaces produced were similar for the four bone cements studied. The fracture surface was fragmented by crevices, which developed through the matrix and around large undissolved polymethylmethacrylate (PMMA) beads. Three bands with different features existed on the bending fracture surfaces, with an abrupt transition between them. It appears that the agglomerates of zirconium dioxide particles are implicated in Palacos R-40 bone cement fracture surface. The examination of compressive failed specimens revealed that a yielded crack ...
0003]Polymethylmethacrylate bone cements can be mixed in suitable mixing beakers with spatulas by mixing the cement powder with the monomer liquid. This procedure is disadvantageous in that inclusions of air may be present in the cement dough thus formed and may later cause destabilization of the bone cement. For this reason, it is preferable to mix bone cement powder with the monomer liquid in vacuum mixing systems, since mixing in a vacuum removes inclusions of air from the cement dough all but completely and attains optimal cement quality (Breusch, S. J. et al., "Der Stand der Zementiertechnik in Deutschland [The State of Cementing Technology in Germany]," Z. Orthop., 137: 101-07 (1999)). Bone cements mixed in a vacuum have substantially lower porosity and thus show improved mechanical properties. A large number of vacuum cementing systems have been disclosed of which the following shall be named for exemplary purposes: U.S. Pat. Nos. 6,033,105; 5,624,184; 4,671,263; 4,973,168; 5,100,241; ...
A bone cement mixing apparatus for mixing a powder bone cement component with a liquid bone cement component includes a bowl and a lid removably secured to the bowl. The lid has a sealable liquid delivery port defined therein which is adapted to sealingly receive an outlet coupling of a liquid delivery device. The bone cement mixing apparatus also includes a crank rotatably attached to the lid and a blade positioned in the bowl. The blade is secured to the crank such that rotation of the crank causes rotation of the blade. A method for mixing bone cement is also disclosed.
Global Bone Cement & Glue Market report delineates the thorough and collective examination of Bone Cement & Glue industry during the past, present and conjecture period. All the business verticals like aggressive market situation, regional Bone Cement & Glue nearness, and improvement openings are clarified. Top players (Stryker, Zimmer Biomet, Depuy Synthes (A Part Of Johnson & Johnson), Smith & Nephew, Arthrex, Djo Global, Exactech, Teknimed, Heraeus Medical, Cryolife, Cardinal Health, Trimph) of Bone Cement & Glue industry, their business strategies, and growth opportunities are covered in this report. A report is incomplete without having the knowledge of the key players or competitors within the market. Many basic aspects build the market that drives the expansion of associate degree trade or an organization.. Get an exclusive sample of research report: Report Sample. The report analyses the Bone Cement & Glue market based on its engaging quality and venture achievability. Likewise, it ...
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Two-stage exchange with antibiotic-loaded bone cement spacers remains the gold standard for chronic periprosthetic joint infection (PJI). Rifampicin is highly efficient on stationary-phase staphylococci in biofilm; however, its addition to PMMA to manufacture spacers prevents polymerization and reduces mechanical properties. Isolation of rifampicin during polymerization by microencapsulation could allow manufacturing rifampicin-loaded bone cement maintaining elution and mechanical properties. Microcapsules of rifampicin with alginate, polyhydroxybutyratehydroxyvalerate (PHBV), ethylcellulose and stearic acid (SA) were synthesized. Alginate and PHBV microcapsules were added to bone cement and elution, compression, bending, hardness, setting time and microbiological tests were performed. Repeated measures ANOVA and Bonferroni post-hoc test were performed, considering a p,0.05 as statistical significance. Bone cement specimens containing alginate microcapsules eluted more rifampicin than PHBV ...
Bone cement creep behavior was studied using commercial available clinical bone cement. Creep deformation was measured using a micrometer with a resolution of 1 μm. It was demonstrated that the restraint has a very strong effect on the creep of bone cement, half-restrained specimens creep more than that of fully restrained specimens. The creep of the investigated bone cement increased with the dynamic loading cycles, and two creep stages, a high initial creep rate followed by a steady creep stage, can be identified. The relationship between the creep deformation and the loading cycles was expressed by a single logarithmic model.. ...
The Global market size of Bone cement mixers is $XX million in 2018 with XX CAGR from 2014 to 2018, and it is expected to reach $XX million by the end of 2024 with a CAGR of XX% from 2019 to 2024.. Global Bone cement mixers Market Report 2019 - Market Size, Share, Price, Trend and Forecast is a professional and in-depth study on the current state of the global Bone cement mixers industry. The key insights of the report:. Download for a sample copy of this report @ https://www.bigmarketresearch.com/request-sample/3235921?utm_source=IR&utm_medium=SS. 1.The report provides key statistics on the market status of the Bone cement mixers manufacturers and is a valuable source of guidance and direction for companies and individuals interested in the industry.. 2.The report provides a basic overview of the industry including its definition, applications and manufacturing technology.. 3.The report presents the company profile, product specifications, capacity, production value, and 2013-2018 market shares ...
A novel bone cement composed of sintered zinc-calcium-silicate phosphate and hybrid polyalkenoates has been developed. Synthesis and formulation of glass fillers, monomers and polymers as well as formulation of the cement were described. The effects of sintering, polymer content, glass powder/polymer liquid (P/L) ratio and comonomer on compressive strength (CS) and curing time (CT) were investigated. The effects of P/L ratio and comonomers on shrinkage as well as exotherm were also studied. Results show that the experimental cement was 61% higher in CS, 10% lower in diametral tensile strength, 35% lower in flexural strength, 62% less in exotherm, and 68% less in shrinkage, compared to conventional polymethylmethacrylate cement. With increasing polymer content and P/L ratio in the cement formulation CS of the cement increased but CT decreased. Curing time, shrinkage and exotherm of the cement decreased with increasing P/L ratio. It appears that this novel cement may be a potential candidate for ...
A custom made femoral component is made using the femoral cavity and an internal latex envelope as the mold. After the femoral cavity is worked into a roughly conical shape, an internal latex envelope is inserted into the cavity and filled with bone cement. An endoskeleton is inserted down the femoral cavity into the bone cement. The internal latex mold conforms to the shape of the cavity and an accurate negative of the cavity is created as the bone cement solidifies. The femoral component is pulled from the cavity and the internal latex envelope is peeled off the component. All traces of the internal latex envelope is removed from the femoral cavity and component. The femoral component is then reimplanted.
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 standard cementing technique for total hip and knee arthroplasty (THA, TKA) was modified by interposing osteoconductive porous polycrystalline hydroxyapatite (HA) granules at the cement-bone interface to augment cement-bone bonding. Twenty-one specimens from the acetabulum and two specimens from the femur containing well-fixed bone-cement interface were retrieved five months to twenty-two years after THA and TKA with an interface bioactive bone cement technique. Histological findings were evaluated in terms of the retrieved sites, the interval between index operation and revision, patient age at retrieval and bone pathology. Dense bone ingrowth was observed in all specimens retrieved from the superior wall of the acetabulum. Cancellous bone ingrowth was observed in specimens retrieved from the infero-medial wall of the acetabulum. Connective tissue interposition and osteolysis were observed at the sites where hydroxyapatite granules were absent. Findings of bone ingrowth for the HA ...
Two-stage revision arthroplasty is today considered as the gold standard for control of chronic deep prosthetic infection. Although the revision arthroplasty should only be considered when infection is eliminated, the diagnosis of residual infection prior to the revision remains a challenging problem. We evaluated triple-phase bone scintigraphy as a useful diagnostic test for the detection of residual infection around the antibiotic-impregnated cement spacer in patients waiting for the second-stage revision hip or knee arthroplasty. Increased uptake of radioisotope in all three phases was considered positive for infection. The final diagnosis was based on histopathological results in addition to microbiologic examinations of surgical specimens. Histopathological examination showed positive in 17 and negative in 13 out of 30 examinations. Among 17 samples positive for histopathology, there were only 4 samples positive for bacterial culture. All samples negative for histopathology showed negative for
TY - JOUR. T1 - The effect of vacuum mixing and pre-heating the femoral component on the mechanical properties of the cement mantle. AU - Baleani, M.. AU - Bialoblocka-Juszczyk, E.. AU - Engels, G. E.. AU - Viceconti, M.. PY - 2010/3. Y1 - 2010/3. N2 - We investigated the effect of pre-heating a femoral component on the porosity and strength of bone cement, with or without vacuum mixing used for total hip replacement. Cement mantles were moulded in a manner simulating clinical practice for cemented hip replacement. During polymerisation, the temperature was monitored. Specimens of cement extracted from the mantles underwent bending or fatigue tests, and were examined for porosity. Pre-heating the stem alone significantly increased the mean temperature values measured within the mantle (+14.2°C) (p ,0.001) and reduced the mean curing time (-1.5 min) (p ,0.001). The addition of vacuum mixing modulated the mean rise in the temperature of polymerisation to 11°C and reduced the mean duration of the ...
TY - CONF. T1 - Characterisation of mechanical properties of acrylic bone cement as a function of aging conditions and mixing environment. AU - Makem, Jonathan. PY - 2005/1. Y1 - 2005/1. M3 - Paper. SP - 326. EP - 335. ER - ...
F2118-14 Standard Test Method for Constant Amplitude of Force Controlled Fatigue Testing of Acrylic Bone Cement Materials constant-amplitude uniaxial tension-compression fatigue~
The cement-bone interface plays an important role in load transfer between cemented implant systems and adjacent bone, but little is known about the micromechanical behavior of this interface following in vivo service. Small samples of postmortem-retrieved cement-bone specimens from cemented total hip replacements were prepared and mechanically loaded to determine the response to tensile and compressive loading. The morphology of the cement-bone interface was quantified using a CT-based stereology approach. Laboratoryprepared specimens were used to represent immediate postoperative conditions for comparison. The stiffness and strength of the cement - bone interface from postmortem retrievals was much lower than that measured from laboratory-prepared specimens. The cement-bone interfaces from postmortem retrievals were very compliant (under tension and compression) and had a very low tensile strength (0.21±0.32 MPa). A linear regression model, including interface contact fraction and ...
PURPOSE The usual treatment in cervical nerve root compression syndrome is the ventral fusion with bone cement. We examined the influence of this interponate on the postoperative changes of the cervical spine. MATERIALS AND METHODS 33 patients were followed-up postoperatively over 6 months, who were treated with 39 ventral fusions because of cervical myelopathy. The lateral view of the cervical spine was used to measure the size of the bone cement interponate, the height of the intervertebral body space and the angle of both vertebral bodies. RESULTS There was no change on the size of the interponate. Postoperatively there was a slight enlargement of the intervertebral body space. During further follow-up examinations there was a decrease to the preoperative size because of the destruction of the endplates. Similar to this observation, there was a change of the angle in the operated segment. First there was a decrease of the angle, later an increase. 6 months postoperatively the preoperatively
In a device for injecting bone cement, the discharge direction of the bone cement after insertion of the cannula should be controllable in a certain region. This is made possible through a radial exit aperture ( 5 ) which is provided on the front end of the cannula ( 3 ). Since the cannula is inserted with the aid of a guide wire ( 1 ), it has an orifice ( 4 ) on its front end, which orifice must be closed off by means of a ball ( 15 ) prior to the injection. A plunger serves to insert the ball ( 15 ). So that the situation of the radial aperture ( 5 ) is known at all times, even with inserted cannula, the handle ( 17 ) of the cannula has an asymmetrical shape.
Orthopedic Bone Cement Market Trends, Analysis, Industry Overview and Business Research Reports. Orthopedic Bone Cement Market Syndicate Report, Share, Size and Forecast Reports - UK and US
The invention relates to surgical bone cement compositions and more particularly to bone cement compositions having aneasthetic properties, and to methods for producing analgesia.
Bone cement PubMed Central PMC. Dec 15 2013 · 2 Historical perspective Themistokles Gluck 1870 had fixed a total knee prosthesis made of ivory using cement made of plaster and colophony 3 Otto Rohm and Kulzer were early pioneers who worked extensively on the physical properties and uses of bone cement The era of modern PMMA bone cements comes from the patent by Degussa and Kulzer 1943 who had described the Read More + ...
A bone cement having a dry component including a large constituent and a small constituent. The small constituent fills a substantial volume of the interstitial spaces between the particles of the large constituent. Therefore, only a second or minor interstitial space is left remaining between the individual particles of the small constituent and the particles of the small constituent and the particles of the large constituent. Therefore, a reduced amount of a polymerizable component need be added to the dry component to form a bone cement. Such a bone cement formulation decreases the exothermic temperature of the bone cement and decreases the possibility of tissue necrosis in the implantation area.
The demand for hip and knee joint operations is increasing rapidly. Today, doctors implant almost 200,000 artificial hips and 120,000 knee joint prostheses (endoprosthetics) every year in Germany alone. Implanting artificial joints has become routine but still presents challenges, since the success of the operation depends on the secure and long-term anchoring of the prostheses in bone. Heraeus Medical has been developing specialized bone cements and the related mixing systems for many years. Now, with an innovative ready-to-use cementing system, Dr. Sebastian Vogt (Heraeus Medical) has simplified mixing and handling bone cement for doctors and surgical staff. Dr. Vogt and his team have developed a completely new, paste-like bone cement. Previously, bone cement came powdered and had to be combined with a liquid in a vacuum system, then mixed to form a homogeneous paste. Now the innovative paste-like bone cement can be applied directly to the implant site in a patients hip or knee with a ...
The aim of this work was to assess the preliminary anatomical and functional results of patients to establish prospects. Materials and method: We report here the preliminary results of a retrospective mono-centric, homogeneous and continuous series, of 21 non-cemented total hip implants, implanted from January 2011 to December 2014. The mean follow-up time was 24 months. The patients were evaluated by Harriss hip at the last follow-up. Results: The mean age of the intervention was 30 years. In our series, we observed a male predominance (60% of cases). Clinically, the Harris score varied significantly from 52.6 ± 11.4 pre-operatively to 85.1 ± 5.1 during the last follow-up visit. Among the items in the score, pain was the parameter that showed the greatest improvement. Thigh pain was observed in only one patient operated on the two sides. At the level of radiology, the femoral implant showed great stability. Bone resorption was suspected in 14 cases (66.66%), and confirmed in 4 cases (19.04%) with
Cemex Genta is a bone cement loaded with gentamicin which can be used for the fixation of artificial joint prostheses to the host bone.
Listings in Stabilizers / Stabilization Equipment, Bone Probes, Bone Cement, Biomaterials, Depth Gages and Revenue Management / Performance Consulting...
Listings in Stabilizers / Stabilization Equipment, Bone Cement, Biomaterials, Depth Gages and Revenue Management / Performance Consulting in Altamonte...
The effect of mixing biophesphonates on bone cement strength. Presented at: British Orthopaedic Research Society, Cardiff, UK ...
Vertebral consolidation - Accessories for mixing and injection of bone cements - G21 offers a variety of mixing and injection systems to complete its product portfolio for vertebral consolidation, ranging from basic bowls and syringes to fully sealed vacuum systems.
The Global Orthopedic Bone Cement and Casting Materials Market Research Report Forecast 2017-2021 is a valuable source of insightful data for business strategists.
Global Orthopedic Bone Cement and Casting Materials Market: This Research Report is designed with clear focus on Growth, Share, Opportunities
The motive of this strategic research report entitled Global Orthopedic Bone Cement and Casting Materials Market 2017 is to provide company officials, in
An orthopaedic bone cement mixing device comprising a mixing bowl (1) and a lid (3), said lid (3) having a handle (4) extending outwardly therefrom. A mixing paddle (7) comprising a shaft (8) and vanes (9) extending outwardly therefrom extends into the bowl (1) from the lid (3) and is anchored in a groove (10) running around the base (2) of the bowl. A step-up gear mechanism (5, 11) is provided between the paddle (7) and the lid (3) such that, as the handle (4) is rotated the lid (3) rotates, causing the paddle (7) to rotate around the bowl (1). The drive wheel (5) of the gear mechanism is also caused to rotate and drives the driven wheel (11) which causes the shaft (8) of the paddle (7) to rotate about its own axis as the paddle (7) moves around the bowl (1).
We provide detailed product mapping and analysis of various market scenarios. Our analysts are experts in providing in-depth analysis and breakdown of the business of key market leaders. We keep a close eye on recent developments and follow latest company news related to different players operating in the global Bone Cement & Glue market. This helps us to deeply analyze companies as well as the competitive landscape. Our vendor landscape analysis offers a complete study that will help you to stay on top of the competition.. Table of Contents. Report Overview: It includes the objectives and scope of the study and gives highlights of key market segments and players covered. It also includes years considered for the research study.. Executive Summary: It covers industry trends with high focus on market use cases and top market trends, market size by regions, and global market size. It also covers market share and growth rate by regions.. Key Players: Here, the report concentrates on mergers and ...
The global orthopedic bone cement market is expected to reach USD 1.1 billion by 2025, according to a new report by Grand View Research, Inc. Growing number of orthopedic
Summary This report studies Bone Cement in Global market, especially in North America, Europe, China, Japan, Southeast Asia and India, focuses on top manuf
0002]In the most general sense of the word, a cement is a binder that is a substance which sets and hardens independently, and can bind other materials together. Cements used in construction are characterized as hydraulic or non-hydraulic. The most important use of cement is the production of mortar and concrete--the bonding of natural or artificial aggregates to form a strong building material which is durable in the face of normal environmental effects. Hydraulic cements are materials which set and harden after combining with water, as a result of chemical reactions with the mixing water and, after hardening, retain strength and stability even under water. The key requirement for this is that the hydrates formed on immediate reaction with water are essentially insoluble in water. Most construction cements today are hydraulic, and most of these are based upon Portland cement, which is made primarily from limestone, certain clay minerals, and gypsum, in a high temperature process that drives off ...
In the Petroleum Industry today, downhole cement plays an important role during drilling & production operations. It is responsible for lending strength to the casing for future production, it helps in preventing collapse of the formation, as well as restricts fluid movement between permeable zones. This downhole cement however, has different problems in the field from inadequate compressive strength, early setting of slurry etc. But of all these problems, sulfate attack on downhole cement is probably the biggest one facing the industry today. Another problem in use of different cement slurries has been the traditional lack of research for cement permeability, which has the biggest influence on the degree of this sulfate attack. Thus Texas Tech University & BJ Services have thus carried out a new study in my thesis, where we have studied & analyzed how sulfates in water react with the dry cement initially by measuring this initial permeability. Thus a study has also been carried out in measuring ...
The present invention provides cement compositions that include degradable materials, and methods of using such compositions in subterranean cementing operations. An example of a method of the present invention includes: providing a cement composition that includes a hydraulic cement, and a degradable material; placing the cement composition in a subterranean formation; allowing the cement composition to set therein; and allowing the degradable material to degrade. Another example of a method of the present invention is a method of enhancing the mechanical properties of a cement composition including adding a degradable material to the cement composition and allowing the degradable material to degrade.
Purchase your copy of ASTM F451 - 16 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available online in electronic and print formats.
Nowadays, one of the most popular ways to get a more sustainable cement industry is using additions as cement replacement. However, there are many civil engineering applications in which the use of sustainable cements is not extended yet, such as special foundations, and particularly micropiles, even though the standards do not restrict the cement type to use. These elements are frequently exposed to the sulphates present in soils. The purpose of this research is to study the effects in the very long-term (until 600 days) of sulphate attack in the microstructure of micropiles grouts, prepared with ordinary Portland cement, fly ash and slag commercial cements, continuing a previous work, in which these effects were studied in the short-term. The microstructure changes have been analysed with the non-destructive impedance spectroscopy technique, mercury intrusion porosimetry and the
1 0 6 9 7 unuog nLrLn HuL LAHWHNLH March 11, 1969 M KELLY ETAL 3,432,317 HYDRAULIC CEMENT MIX CONTAINING SACCHARIDE POLYMERS Original Filed April,27, 1964 Sheet of 5 nus 2E2 .38 l 3 Q was mzifisz 8f .35 9 0 m$m883u kzmtmu mo SUN/70d N/ 77nd March 11, 1969 1 KELLY ETAL HYDRAULIC CEMENT MIX CONTAINING SACGHARIDE POLYMERS Sheet Original Filed April 27, 1964 $0 In QYkQk I nwqo dziwfiik mat 3 0 msmwtuumouad EEG. .3 $9.8: G x sSEmomQou SUN/70d N/ 77nd lNVENTURS I Q $3 3. P luv HYDRAULIC CEMENT MIX CONTAINING SACCHARIDB POLYMERS Sheet Original Filed April 27, 1964 WEQQI Mtik Q m. m k w n v n w o o T n .l E a $589 33528 I Q q .3555 S53E28 $588 3 No :6 Q66 33 m as was n86 9 0 wit l mm at 2 E 8 -dzqEfiE m mqxwuqmouim K333 6 2st 8536 kin Am & mkamzomtou mEkEq I 9. .E @328 .8 @3335: an E3. n. //V VE N TORS SON/70d N/ 770:! United States Patent ABSTRACT OF THE DISCLOSURE A hydraulic cement mix of cement, aggregate and sufiicient water to effect hydraulic setting of the cement and an additive in an amount ...
There are mainly two types of fixation to hold the prostheses in position: cemented fixation, in which fast curing bone cement is used to hold the prostheses in place, and cementless fixation, which relies on bone growing into the surface of the implant for fixation. Both of the two have their own advantages and shortcomings. Most knee replacement implants today are cemented, and normally they act very well. The stability of cemented fixation relies on the connection between the prostheses and the cement, and the adhesion between cement and bone is also very important. Cementless implants have a surface topography that is conducive to attracting new bone growth. Most are textured or coated so that the new bone actually grows into the surface of the implant. They may also use screws or pegs to stabilize the implant until bone ingrowth occurs. Since they depend on new bone growth for stability, cementless implants require a longer healing time than cemented replacements. Both of the two types implants