Jacobsson S A, Djerf K, Gillquist J, Svedberg J
Department of Orthopedics, University Hospital, Linköping, Sweden.
Acta Orthop Scand. 1994 Aug;65(4):418-23. doi: 10.3109/17453679408995483.
In a prospective, randomized study of cementless total hip arthroplasties, radionuclide images as well as radiographs were obtained at 6, 12, and 36 months postoperatively. The femoral component was porous-coated, rigid in 28 patients and smooth, isoelastic in 28. The radionuclide uptake was quantified in the regions of interest and correlated to the non-operated side. Among prostheses considered to be stable 3 years after surgery, the activity had normalized in the calcar region. The uptake was also reduced below the tip of the prostheses, but the activity was still 50 percent increased compared to the non-operated side. The isoelastic prosthesis showed less reduction of activity below the tip than the rigid prosthesis. Proximally, the isoelastic prosthesis showed no reduction of activity, whereas the rigid prosthesis had normalized the uptake at the 3-year control. A high rate of non-stable fixation was observed for the flexible prosthesis at the radiographic assessment, which may have contributed to the increased radionuclide activity. Sequential scintimetry may be used as a complement to the radiographic evaluation of the femoral component of the hip prosthesis.
在一项关于非骨水泥型全髋关节置换术的前瞻性随机研究中，术后6个月、12个月和36个月时获取了放射性核素图像以及X线片。股骨假体在28例患者中为多孔涂层、刚性，在另外28例中为光滑、等弹性。在感兴趣区域对放射性核素摄取进行定量，并与未手术侧进行对比。在术后3年被认为稳定的假体中，转子区的活性已恢复正常。假体尖端下方的摄取也有所降低，但与未手术侧相比，活性仍增加了50%。等弹性假体在尖端下方的活性降低程度比刚性假体小。在近端，等弹性假体的活性没有降低，而刚性假体在3年复查时摄取已恢复正常。在X线评估中观察到柔性假体的固定不稳定率较高，这可能导致了放射性核素活性增加。连续闪烁扫描法可作为对髋关节假体股骨部件进行X线评估的补充方法。
