H／G非骨水泥人工全髋关节置换术后髋臼侧的X线观察

目的：观察Ｈ／Ｇ非骨水泥人工全髋关节置换术后髋臼假体周围的骨反应。方法：根据Ａｍｓｔｕｔｚ的分区方法对２５例２８个Ｈ／Ｇ人工全髋关节进行髋臼侧Ｘ线随访观察。随访时间３６～７６个月，平均４８个月。结果：髋臼侧出现各种骨反应２３个关节，占关节总数的８２．１％。其中髋臼假体周围成骨２２个关节，占关节总数７８．５％；透亮带出现４个关节，占关节总数的１４．３％；骨硬化２个关节，占关节总数的７．１％；骨吸收２个关节，占关节总数的７．１％；无髋臼松动病例。发生时间以９～１２个月为主，发生部位以１～３区为多见。结论：假体周围成骨是骨小梁长入髋臼表面微孔区域，受力后逐渐增粗变大的现象，对长期稳定假体十分重要。但对于吸收类骨反应和透亮带的出现，作者通过改良手术操作，以期避免或减少发生。

Roentgenographic Evaluation of Acetabular Regions after H/G Noncement Total Hip Replacement

Objective: To observe the bone changes in acetabular region after H/G noncement total hip replacement. Methods: The postoperative roentgenographs of the acetabular region of 28 hips in 25 patients undergone H/G noncement total hip replacement were analysed according to Amstutz method. The average follow-up was 48 months (range, 36 to 76 months). Results: Twenty-three (82.1%) hips demonstrated bone changes in acetabular regions. Osteogenesis around acetabular components was observed in 22 hips (78.5%), radiolucent line in 4 hips (7.1%). There was no loosening of acetabular component. Most of the bone changes appeared in ninth to twelfth month after operation and located mainly at the 1,2,3 regions. Conclusion: Osteogenesis around implants indicated that bone trabecula grew into the pore region of th acetabular component, which was very important to maintain the long-term stability of the implants. The authors believed that the changes of bone absorption and radiolucent may be limited by means of improvement of the operative technique.