Hernandez J R, Keating E M, Faris P M, Meding J B, Ritter M A
Center for Hip and Knee Surgery, Mooresville, Indiana 46158.
J Bone Joint Surg Br. 1994 Mar;76(2):263-6.
We measured polyethylene wear in 231 porous-coated uncemented acetabular cups. We divided the hips into two groups according to the fixation of the femoral component, by cementing (n = 97) or press-fit (n = 134). Follow-up was from three to five years. The patients in two sub-groups were matched for weight, diagnosis, sex, age and length of follow-up. The linear wear rate of cups articulated with uncemented femoral components (0.22 mm/year) was significantly higher than the wear rate (0.15 mm/year) of cups articulated within cemented femoral components (p < 0.05). These results can be compared with previously reported wear rates of 0.08 mm/year for cemented all-polyethylene cups and 0.11 mm/year for cemented metal-backed cups. The higher wear rates of uncemented arthroplasties could jeopardize the long-term results of this type of hip replacement.
我们测量了231个多孔涂层非骨水泥髋臼杯的聚乙烯磨损情况。根据股骨部件的固定方式，我们将髋关节分为两组，即骨水泥固定组（n = 97）和压配组（n = 134）。随访时间为3至5年。两个亚组的患者在体重、诊断、性别、年龄和随访时间方面进行了匹配。与骨水泥固定股骨部件的髋臼杯相比，非骨水泥固定股骨部件的髋臼杯的线性磨损率（0.22毫米/年）显著更高（骨水泥固定组磨损率为0.15毫米/年）（p < 0.05）。这些结果可与先前报道的骨水泥全聚乙烯杯磨损率0.08毫米/年和骨水泥金属背衬杯磨损率0.11毫米/年进行比较。非骨水泥关节成形术较高的磨损率可能会危及此类髋关节置换的长期效果。
