Isolated
Many designs of unicompartmental knee replacement show early and mid-term failure due to polyethylene
We examined radiographic polyethylene
We measured polyethylene
Since
The ABG I cementless hip prosthesis has demonstrated unacceptably high rates of
We used radiostereometric analysis to compare
The purpose of this study was to undertake a
meta-analysis to determine whether there is lower polyethylene
We have studied the influence of weight-bearing on the measurement of
We examined 108 uncemented femoral stems with modular femoral heads which had been retrieved for reasons other than loosening. There were detectable amounts of
We have reviewed 70 patients with bilateral simultaneous total hip arthroplasties to determine the rate of failure and to compare polyethylene
We retrieved 159 femoral heads at revision surgery to determine changes in surface configuration. Macroscopic
Nanometre-sized particles of ultra-high molecular weight polyethylene have been identified in the lubricants retrieved from hip simulators. Tissue samples were taken from seven failed Charnley total hip replacements, digested using strong alkali and analysed using high-resolution field emission gun-scanning electron microscopy to determine whether nanometre-sized particles of polyethylene debris were generated in vivo. A randomised method of analysis was used to quantify and characterise all the polyethylene particles isolated. We isolated nanometre-sized particles from the retrieved tissue samples. The smallest identified was 30 nm and the majority were in the 0.1 μm to 0.99 μm size range. Particles in the 1.0 μm to 9.99 μm size range represented the highest proportion of the
We studied the
1. By reducing the viscosity of the synovial fluid within the ankle joints of rabbits and then subjecting these to prolonged exercise,
In this prospective, randomised study, we have compared the
We compared
We have studied 27 tibial prostheses retrieved from knee replacements after 1 to 9 years. In 22 the femoral components were of cobalt-chrome, in five polyacetal. The design of the components gave a nominal contact area of 320 mm2 on each condyle. The tibial component was of high-density polyethylene (HDP) at least 6 mm thick, and not heat-treated. In the metal/HDP prostheses the average
Laboratory
The direction of