Wear simulation of total hip prostheses with polyethylene against CoCr, alumina and diamond-like carbon.
Wear simulation of total hip prostheses with polyethylene against CoCr, alumina and diamond-like carbon.
复制标题
DOI：
10.1016/s0142-9612(00)00306-9
复制
发表时间：
2001-06
期刊：
影响因子：
14
通讯作者：
V. Saikko;T. Ahlroos;O. Calonius;J. Keränen
中科院分区：
文献类型：
--
作者：
V. Saikko;T. Ahlroos;O. Calonius;J. Keränen
采用新型双轴髋关节磨损模拟器，以稀释的牛血清为润滑剂，研究了超高分子量聚乙烯髋臼杯的磨损情况。杯子已经包装好，在氩气中进行了伽玛辐照。这些杯连接在两种已建立的股骨头上，氧化铝和CoCr，以及一种实验类型，CoCr涂有类金刚石碳（DLC）。头部直径为28mm。由于聚乙烯对氧化铝和CoCr的临床磨损行为相对已知，因此研究了聚乙烯对氧化铝和CoCr的磨损。用这些已建立的材料对新模拟器进行了验证。磨损机制，包括磨损颗粒的大小和形状，与临床研究结果一致。杯子对氧化铝和CoCr头的平均磨损率分别为每100万次循环48毫克和56毫克。该顺序与临床观察一致。DLC的平均磨损率为每100万次循环58毫克。作为聚乙烯的对面，DLC与氧化铝和CoCr没有显著差异。
The wear of ultra-high molecular weight polyethylene acetabular cups was studied with a new biaxial hip wear simulator using diluted calf serum as a lubricant. The cups had been packed and gamma-irradiated in argon. The cups were articulated against two established types of femoral head, alumina and CoCr, and one experimental type, CoCr coated with diamond-like carbon (DLC). The diameter of the heads was 28mm. Polyethylene against alumina and against CoCr were studied because their clinical wear behaviour is relatively well known. The new simulator was validated with these established materials. The wear mechanisms, including the size and shape of the wear particles, agreed well with those seen in clinical studies. The average wear rates of the cups against alumina and CoCr heads were 48 and 56mg per 1 million cycles, respectively. The order is in agreement with clinical observations. The average wear rate against DLC was 58mg per 1 million cycles. As a counterface for polyethylene, DLC did not markedly differ from alumina and CoCr.