Chen S C, Badrinath K, Pell L H, Mitchell K
Highlands Hospital, Enfield, England.
J Bone Joint Surg Br. 1989 Mar;71(2):186-8. doi: 10.1302/0301-620X.71B2.2925732.
We aimed to find out whether the Hastings bipolar prosthesis moved in a bipolar fashion after its use for displaced fractures of the femoral neck. In 65 patients non-weight-bearing movement was assessed radiographically and compared with an earlier study of the Monk prosthesis. In 70% of patients, the only movement was between the acetabulum and the prosthetic shell, the prosthesis behaving as if it were unipolar. This did not change with time, but there was a slight improvement in the range of movement, particularly in flexion. The absence of movement between the outer shell and the metal head is most probably due to the design of the prosthesis and makes this prosthesis unsuitable for use in osteoarthritic hips.
我们旨在探究黑斯廷斯双极假体在用于股骨颈移位骨折后是否以双极方式移动。对65例患者进行了非负重活动的影像学评估，并与之前对蒙克假体的研究进行了比较。在70%的患者中，唯一的活动发生在髋臼与假体外壳之间，该假体表现得如同单极假体。这种情况并未随时间改变，但活动范围略有改善，尤其是在屈曲方面。外壳与金属头之间缺乏活动很可能是由于假体的设计，这使得该假体不适用于骨关节炎髋关节。
