HSS J. 2010 Sep;6(2):134-7. doi: 10.1007/s11420-009-9149-0. Epub 2010 Jan 29.
Avoidance of patellar eversion during total knee arthroplasty may help to prevent injury to the patellar tendon. The purpose of this study was to compare the load-to-failure of the everted versus the noneverted patella in a cadaveric model. Fourteen cadaver knees (seven pairs) were loaded to failure with the patella everted in one knee and not everted in the other. Mean load-at-ultimate failure in the patella-everted group was 1,111 ± 572 N, and in the patella-noneverted group was 1,621 ± 683 N (p = 0.01). Additionally, loads-at-initial-partial failure were lower (p = 0.04) in the patella-everted compared to the patella-noneverted group, 573 ± 302 N versus 1,115 ± 358 N, respectively. A partial failure of the patellar tendon occurred in 100% of the everted specimens, whereas only 57% of the noneverted specimens had partial failure. These findings suggest patella eversion may lead to failure of the patellar insertion at lower loads than when the patella is not everted.
在全膝关节置换术中避免髌骨外旋可有助于防止髌腱损伤。本研究的目的是比较尸体模型中髌骨外旋与不旋的极限失效载荷。14 个尸体膝关节（7 对）分别对髌骨外旋和不旋的膝关节进行加载直至失效。髌骨外旋组的最终失效载荷的平均值为 1111 ± 572N，而髌骨不旋组为 1621 ± 683N（p=0.01）。此外，髌骨外旋组的初始部分失效载荷也较低（p=0.04），分别为 573 ± 302N 和 1115 ± 358N。100%的髌骨外旋标本发生了髌腱的部分失效，而只有 57%的髌骨不旋标本发生了部分失效。这些发现表明，与髌骨不旋相比，髌骨外旋可能导致髌腱在较低的负荷下发生失效。
