Effect of protein lubrication on the wear properties of materials for prosthetic joints

Liao, Yen-Shuo; Benya, Paul D.; McKellop, Harry A.

doi:10.1002/(sici)1097-4636(1999)48:4<465::aid-jbm10>3.0.co;2-y

Cited by 115 publications

(67 citation statements)

References 9 publications

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“…128,137 If extensive monoclinic transformation of the material occurs, the crack-resisting advantage is lost, and the material becomes susceptible to increased surface roughness and damage. 23,125,126 In the in vivo environment, variables such as frictional heating phenomena between the bearing surfaces, [147][148][149][150][151] and localized high loads on the bearing surface 128,137 can lead to unpredictable behavior of Y-ZTP ceramic bearings. With increasing conversion of the surface layers to the monoclinic phase, TZP femoral heads can undergo surface degradation, leading to an increased risk of catastrophic failure.…”

Section: July 2007mentioning

confidence: 99%

Ceramics for Prosthetic Hip and Knee Joint Replacement

Rahaman

Yao

Bal

et al. 2007

Journal of the American Ceramic Society

307

160

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The most commonly used bearing couple in prosthetic hip or knee joint replacements consists of a cobalt–chrome (CoCr) metal alloy articulating against ultrahigh‐molecular‐weight polyethylene. Ceramics have been used as an alternative to metal‐on‐polyethylene in joint replacement surgery of arthritic hips and knees since the 1970s. In prosthetic hip and knee bearings, ceramic surfaces offer a major benefit of drastically reduced wear rates and excellent long‐term biocompatibility, which can increase the longevity of prosthetic hip and knee joints. This benefit is important clinically because hip and knee replacement has become a very common surgical procedure, particularly in the United States, and because these procedures are being increasingly performed in younger patients who place greater demands on the prosthetic bearings. However, ceramics are brittle and the risk of catastrophic bearing failure in vivo, while rare, is a major concern. Improvements in material quality, manufacturing methods, and implant design have resulted in a drastic reduction of the incidence of such failures, so that modern ceramic bearings are safe and reliable if used with components of proven design and durability. Future material improvements are actively being investigated to reduce the risk of ceramic‐bearing failures even further. The purpose of this article is to review the structure, properties, applications, and limitations of the ceramics that have been used in orthopedic bearings, and to describe the new ceramic composite materials and surface treatments that will be available for joint replacement surgery in the near future.

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Section: July 2007mentioning

confidence: 99%

Ceramics for Prosthetic Hip and Knee Joint Replacement

Rahaman

Yao

Bal

et al. 2007

Journal of the American Ceramic Society

307

160

View full text Add to dashboard Cite

show abstract

“…Although the use of a protein‐based serum may have more clinical relevance, it is quite likely that the wear of the material could be confounded by the type of serum chosen. The concentration and types of proteins present in the serum can change the wear rates of materials, quite significantly 37…”

Section: Discussionmentioning

confidence: 99%

Pin‐on‐disc evaluation of self‐reinforced composite poly(methyl methacrylate) for total joint replacements

2006

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Femoral components of hip replacements are commonly anchored in the femur with bone cement or poly(methyl methacrylate) (PMMA). Wear or fracture of bone cement can lead to loosening of the femoral component, which drastically affects the success and longevity of hip replacements. Self-reinforced composite PMMA (SRC-PMMA) has been previously developed for potential use, as a precoat material for hip replacements. The composite consists of high strength fibers that have been shown to have greatly improved mechanical properties over bulk PMMA. The goal of this work was to examine SRC-PMMA for improved wear properties, as a function of processing temperature. Pin-on-disc tests were used to characterize and rank the wear rates of SRC-PMMA and PMMA. Composites made with higher processing temperatures had significantly lower wear rates than do PMMA at a significance level of p < or = 0.05. The lowest wear rate was 8.2 microg/m, at a processing temperature of 136 degrees C, compared to a wear rate for PMMA of 13.3 microg/m. At the lowest processing temperature (105 degrees C), a wear rate higher than PMMA was found, and failure was dominated by fiber delamination. In the more completely processed samples (122 degrees C < or = T < or = 150 degrees C), wear rates were equivalent to or better than PMMA, and smoother and more homogenous wear was noted in wear tracks. Fatigue cracks were prominent at higher processing temperatures or when the wear pin was riding orthogonal to fibers. Wear particles were collected and examined. Wear particle diameter and aspect ratio showed no correlation to processing temperature, but were similar to particles retrieved from human tissue samples.

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“…The properties of synovia vary considerably, and synovia can lose its lubricating properties at high temperatures [7]. Synovia viscosity in natural joints depends on the type of joint disease [8].…”

Section: Introductionmentioning

confidence: 99%

High-Tech Hip Implant for Wireless Temperature Measurements In Vivo

et al. 2012

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When walking long distances, hip prostheses heat up due to friction. The influence of articulating materials and lubricating properties of synovia on the final temperatures, as well as any potential biological consequences, are unknown. Such knowledge is essential for optimizing implant materials, identifying patients who are possibly at risk of implant loosening, and proving the concepts of current joint simulators. An instrumented hip implant with telemetric data transfer was developed to measure the implant temperatures in vivo. A clinical study with 100 patients is planned to measure the implant temperatures for different combinations of head and cup materials during walking. This study will answer the question of whether patients with synovia with poor lubricating properties may be at risk for thermally induced bone necrosis and subsequent implant failure. The study will also deliver the different friction properties of various implant materials and prove the significance of wear simulator tests. A clinically successful titanium hip endoprosthesis was modified to house the electronics inside its hollow neck. The electronics are powered by an external induction coil fixed around the joint. A temperature sensor inside the implant triggers a timer circuit, which produces an inductive pulse train with temperature-dependent intervals. This signal is detected by a giant magnetoresistive sensor fixed near the external energy coil. The implant temperature is measured with an accuracy of 0.1°C in a range between 20°C and 58°C and at a sampling rate of 2–10 Hz. This rate could be considerably increased for measuring other data, such as implant strain or vibration. The employed technique of transmitting data from inside of a closed titanium implant by low frequency magnetic pulses eliminates the need to use an electrical feedthrough and an antenna outside of the implant. It enables the design of mechanically safe and simple instrumented implants.

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Effect of protein lubrication on the wear properties of materials for prosthetic joints

Cited by 115 publications

References 9 publications

Ceramics for Prosthetic Hip and Knee Joint Replacement

Ceramics for Prosthetic Hip and Knee Joint Replacement

Pin‐on‐disc evaluation of self‐reinforced composite poly(methyl methacrylate) for total joint replacements

High-Tech Hip Implant for Wireless Temperature Measurements In Vivo

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