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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Effect of cup inclination angle during microseparation and rim loading on the wear of BIOLOX(R) delta ceramic-on-ceramic total hip replacement.
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Effect of cup inclination angle during microseparation and rim loading on the wear of BIOLOX(R) delta ceramic-on-ceramic total hip replacement.

机译：显微分离和边缘加载期间的杯倾斜角度对BIOLOXδ陶瓷-陶瓷全髋关节置换术磨损的影响。

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摘要

Ceramic-on-ceramic (CoC) bearings in total hip replacements (THRs) have shown low wear volumes under standard gait in hip simulator studies. However, clinical reports have indicated variations in wear rates and formation of stripe-like wear area on the ceramic femoral heads. The aim of this study was to investigate the influence of cup inclination angle and microseparation on the wear of CoC bearings in THRs. The six station Leeds II Physiological Anatomical Joint Simulator was used to investigate the wear of 28 mm diameter alumina matrix composite ceramic bearings (BIOLOX(R) delta). It was shown that increasing the cup inclination angle from 55 degrees to 65 degrees had no significant effect on the wear rate of BIOLOX(R) delta CoC under both standard gait and microseparation conditions in this in vitro study. Under standard gait conditions, the mean wear rate for both cup inclination angle conditions was very low at 0.05 mm(3)/million cycles. The introduction of microseparation to the standard gait cycle increased the mean wear rates to 0.13 mm(3)/million cycles for the cup inclination angle of 55 degrees and 0.11 mm(3)/million cycles for that of 65 degrees . The level of increased wear with microseparation was not dependent on cup angle. A stripe of wear on the head also formed, with corresponding superior rim wear on the cup. The wear rates obtained were low compared to the HIPed third generation alumina ceramic (BIOLOX(R) forte) tested under the same adverse conditions (1.84 mm(3)/million cycles). BIOLOX(R) delta has shown lower wear than previous ceramic materials used in THR under adverse conditions.
机译：在髋关节模拟器研究中，在标准步态下，全髋关节置换（THR）中的陶瓷陶瓷（CoC）轴承显示出低磨损量。但是，临床报告表明，在陶瓷股骨头上，磨损率和条纹状磨损区域的形成存在变化。这项研究的目的是调查杯倾斜角和微观分离对THR中CoC轴承磨损的影响。六站式利兹II生理解剖学联合模拟器用于研究直径为28毫米的氧化铝基复合陶瓷轴承（δ）的磨损。在该体外研究中，表明在标准步态和微分离条件下，将杯倾斜角从55度增加到65度对BIOLOX Delta CoC的磨损率没有明显影响。在标准步态条件下，两个杯子倾斜角条件的平均磨损率都非常低，为0.05 mm（3）/百万次循环。将微分离技术引入标准步态周期，可将杯倾角55度的平均磨损率提高到0.13 mm（3）/百万循环，对于65度角的平均磨损率增加到0.11 mm（3）/百万循环。微分离增加的磨损程度与杯角无关。头部上也形成了一条条纹，杯子上也有相应的边缘磨损。与在相同不利条件下（1.84 mm（3）/百万次循环）测试的HIPed第三代氧化铝陶瓷（BIOLOX®forte）相比，其磨损率较低。在不利条件下，BIOLOXδ的磨损率低于THR中使用的先前陶瓷材料。

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