Itayem R, Arndt A, Nistor L, McMinn D, Lundberg A
Karolinska Institute, Stockholm, Sweden.
J Bone Joint Surg Br. 2005 Feb;87(2):158-62. doi: 10.1302/0301-620x.87b2.15394.
The Birmingham hip resurfacing metal-on-metal arthroplasty was introduced in 1997 and has shown promising short- to mid-term results. We used radiostereophotogrammetric analysis (RSA) to study the stability of 20 resurfacing arthroplasties over a follow-up period of 24 months. Radiological examinations for RSA were performed immediately after surgery and at two, six, 12 and 24 months after operation. Precision and detection of migration thresholds (non-zero movement) were calculated. All the results corresponded well to those found in similar experimental arrangements with standard hip prostheses. Migration of the cup and vertical and mediolateral migration of the head were calculated. The values were low at two years compared with those of earlier studies of cemented femoral components in conventional total hip replacements indicating that there was no evidence of excessive early migration or loosening of the components.
伯明翰金属对金属髋关节表面置换术于1997年引入，已显示出良好的短期至中期效果。我们采用放射立体摄影测量分析（RSA）研究了20例表面置换关节成形术在24个月随访期内的稳定性。RSA的放射学检查在术后即刻以及术后2个月、6个月、12个月和24个月进行。计算了精度和移位阈值（非零移动）的检测值。所有结果与使用标准髋关节假体的类似实验安排中发现的结果吻合良好。计算了髋臼的移位以及股骨头的垂直和内外侧移位。与早期关于传统全髋关节置换术中骨水泥固定股骨部件的研究相比，两年时的数值较低，表明没有证据显示部件存在过度的早期移位或松动。
