METHODS: The study consisted of 127 patients who underwent TKR. Eighty-nine of them treated with use of the dynamic tensioner FUZION formed the study group; the remainder formed the control group. All participants received cemented PERSONA MC without patella resurfacing. All patients had a standard anteroposterior, lateral weight-bearing, long-leg view X-ray and computed tomography examination in 30° of knee flexion following the procedure.
RESULTS: There were no significant differences between the study and the control groups regarding: posterior condylar axis (PCA)-patella angle, surgical transepicondylar axis (sTEA)-patella angle, PCA-sTEA angle, deviation from 90° in PCA-patella, sTEA-patella and PCA-sTEA angles. No significant difference was found in a ratio of obtaining PCA-patella angle deviation of more than 3°. Regarding clinical parameters, statistically and questionablly clinically significant difference in favor of the Study Group was found in Forgotten Joint Score 6 weeks and 3 months post-operativley and ROM 6 weeks post-operatively. However, such difference was not found by analyzing ROM 3 months post-operatively, AKP and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores.
CONCLUSIONS: Compared with the standard 3° of femoral component external rotation, use of a dynamic tensioner does not allow for more accurate restoration of the patellar facet position with reference to the PCA.
方法:该研究包括127例接受TKR的患者。其中89例使用动态张紧器FUZION进行治疗,形成了研究组;其余的形成了对照组。所有参与者均接受水泥PERSONAMC,未进行髌骨重铺。所有患者都有标准的前后,侧向承重,手术后膝关节屈曲30°的长腿X射线和计算机断层扫描检查。
结果:研究与对照组之间在以下方面没有显着差异:后髁轴(PCA)-髌骨角,手术经髁轴(sTEA)-髌骨角,PCA-sTEA角度,PCA-髌骨偏离90°,sTEA-髌骨和PCA-sTEA角度。获得PCA-髌骨角偏差大于3°的比率没有发现显着差异。关于临床参数,在术后6周和3个月的遗忘关节评分和术后6周的ROM中发现了有利于研究组的统计学和可疑的临床显着差异。然而,通过分析术后3个月的ROM没有发现这种差异,AKP和西安大略省和麦克马斯特大学骨关节炎指数(WOMAC)得分。
结论:与标准3°股骨构件外旋相比,动态张紧器的使用不允许相对于PCA更准确地恢复髌骨小面位置。