Zeh Alexander, Davis John, Laskin Richard, Klima Stefan, Wohlrab David
Department of Orthopaedic Surgery and Traumatology, Martin-Luther University of Halle-Wittenberg, Faculty of Medicine, Halle/Saale, Germany.
Acta Orthop Belg. 2009 Dec;75(6):792-800.
The aim of this prospective study was to assess the range of motion (ROM) achieved with the Genesis II Posterior Stabilized High Flexion knee prosthesis. The ROM was compared with that of a historical study group with the standard PS insert and an identical study design. Sixty three patients with primary knee osteoarthritis (37 female, 26 male; average age: 67.0 years, average BMI 31.2) underwent primary cemented TKA with a PS high flex insert. The surgery was performed by one senior author using a mini-midvastus approach. During the follow-up no statistically significant difference in maximal flexion was found between 14 weeks (average flexion = 120 degrees, SD = 11.2) and 65 weeks postoperatively (average flexion = 122 degrees, SD = 8.9). The radiographic evaluation showed no influence of the implant positioning on the final flexion. Compared to the results obtained in a 5 year follow-up study of 100 cases in combination with the PS standard insert, the improvement in final flexion range found in this study did not appear not to be great enough to generally recommend the PS high flex insert in terms of a proven higher flexion result.
这项前瞻性研究的目的是评估Genesis II后稳定高屈曲膝关节假体所实现的活动范围（ROM）。将该ROM与采用标准PS衬垫且研究设计相同的历史研究组进行比较。63例原发性膝关节骨关节炎患者（37例女性，26例男性；平均年龄：67.0岁，平均BMI 31.2）接受了使用PS高屈曲衬垫的初次骨水泥型全膝关节置换术（TKA）。手术由一位资深作者采用迷你股中肌入路进行。在随访期间，术后14周（平均屈曲度 = 120度，标准差 = 11.2）和65周之间未发现最大屈曲度有统计学上的显著差异（平均屈曲度 = 122度，标准差 = 8.9）。影像学评估显示植入物位置对最终屈曲度没有影响。与一项对100例患者使用PS标准衬垫进行的5年随访研究结果相比，本研究中发现的最终屈曲范围的改善似乎不足以基于已证实的更高屈曲结果而普遍推荐使用PS高屈曲衬垫。
