Ahrengart L, Lindgren U
Department of Orthopaedic Surgery, Karolinska Institute, Huddinge University Hospital, Sweden.
J Arthroplasty. 1989;4(2):125-31. doi: 10.1016/s0883-5403(89)80064-6.
The effects of heterotopic bone formation on hip function after arthroplasty was studied in 145 cases of total hip arthroplasty. Hip muscle strength was determined 1.8-2.9 years after the operation, using a Cybex II dynamometer. Heterotopic bone formation was seen after 75% of the operations, and in 21% significant amounts developed (Brooker's classes III and IV). The gain in range of motion after surgery was significantly less in the groups with class III or IV heterotopic bone than in those without heterotopic bone formation. Heterotopic bone did not cause pain or Trendelenburg's limp after surgery; in fact, patients with trochanteric pain had less heterotopic bone than those without this pain. Hip flexion strength was greater in men with heterotopic bone than in those without heterotopic bone. Also, men with heterotopic bone formation had a higher mean maximum strength in extension but lower mean strength in abduction than did men without heterotopic bone (NS). When only patients with unilateral hip disease were considered, the same differences were found around the healthy hip; men with heterotopic bone formation had greater strength in flexion and extension than men without heterotopic bone formation and the same tendencies were seen in women. Accordingly, heterotopic bone had no serious impact on hip muscle strength in this study.
在145例全髋关节置换术中研究了异位骨形成对关节置换术后髋关节功能的影响。术后1.8至2.9年，使用Cybex II测力计测定髋关节肌肉力量。75%的手术患者出现了异位骨形成，其中21%形成了大量异位骨（布鲁克分级III级和IV级）。III级或IV级异位骨组术后活动范围的增加明显少于无异位骨形成的组。异位骨在术后并未引起疼痛或Trendelenburg跛行；事实上，患有转子区疼痛的患者异位骨比无此疼痛的患者少。有异位骨的男性髋关节屈曲力量比无异位骨的男性更大。此外，有异位骨形成的男性平均最大伸展力量较高，但外展平均力量低于无异位骨的男性（无显著性差异）。仅考虑单侧髋关节疾病患者时，在健康髋关节周围也发现了相同的差异；有异位骨形成的男性在屈曲和伸展方面比无异位骨形成的男性力量更大，女性也有相同趋势。因此，在本研究中异位骨对髋关节肌肉力量没有严重影响。
