Sundberg M, Besjakov J, von Schewelow T, Carlsson A
Malmö University Hospital, SE-205 02 Malmö, Sweden.
J Bone Joint Surg Br. 2005 Oct;87(10):1352-6. doi: 10.1302/0301-620X.87B10.16567.
We used roentgen stereophotogrammetric analysis to follow 33 C-stem femoral components for two years after primary total hip arthroplasty. All components migrated distally and posteriorly within the cement mantle. The mean distal migration was 1.35 mm (sd 0.62) at two years and the mean posterior migration was 1.35 mm (sd 0.69) at two years. All the femoral components rotated into retroversion with a mean rotation at two years of 1.9 degrees (sd 1.1). For all other directions, the prosthesis was stable up to two years. Compared with other tapered prostheses, the distal migration of the C-stem is the same, but posterior rotation and posterior migration are greater.
我们采用X线立体摄影测量分析技术，对33个C型柄股骨假体在初次全髋关节置换术后两年进行随访。所有假体均在骨水泥壳内发生向远侧和后方的移位。两年时平均远侧移位为1.35 mm（标准差0.62），平均后方移位为1.35 mm（标准差0.69）。所有股骨假体均发生内旋，两年时平均旋转角度为1.9度（标准差1.1）。在其他所有方向上，假体在两年内均保持稳定。与其他锥形假体相比，C型柄的远侧移位相同，但后方旋转和后方移位更大。
