Kim Jong-Heon
Department of Orthopedic Surgery, Hanyang University College of Medicine, Guri, Korea.
Knee Surg Relat Res. 2013 Jun;25(2):54-9. doi: 10.5792/ksrr.2013.25.2.54. Epub 2013 May 29.
To evaluate the effect of femoral condylar offset and posterior tibial slope on maximal flexion angle of the knee in posterior cruciate ligament (PCL)-sacrificing total knee arthroplasty (TKA, Medial-Pivot Knee System).
Forty-five knees in 35 patients who could be followed up more than 1 year after PCL-sacrificing TKA were evaluated retrospectively. We measured and analyzed the preoperative and postoperative maximal flexion angle, posterior femoral condylar offset difference, posterior femoral condylar offset ratio difference, and tibial slope.
The mean maximal flexion angle after TKA was 118.44°±9.8° and significantly related to postoperative tibial slope (11.78°±6.2°) in correlation analysis (R=0.451, p=0.002). There was no statistical relationship between the postoperative maximal flexion angle and the posterior femoral condylar offset difference (3.24±3.862 mm, R=0.105, p=0.493) and posterior femoral condylar offset ratio difference (0.039±0.029 mm, R=-0.163, p=0.284).
The maximal flexion angle of the knee after PCL-sacrificing TKA was significantly related to the postoperative tibial slope. Therefore, posterior tibial slope can be considered as a factor that affects maximal flexion angle after PCL-sacrificing TKA.
评估在牺牲后交叉韧带（PCL）的全膝关节置换术（TKA，内侧旋转膝关节系统）中股骨髁偏移和胫骨后倾对膝关节最大屈曲角度的影响。
回顾性评估35例患者的45个膝关节，这些患者在牺牲PCL的TKA术后随访时间超过1年。我们测量并分析了术前和术后的最大屈曲角度、股骨后髁偏移差异、股骨后髁偏移比率差异以及胫骨后倾。
TKA术后平均最大屈曲角度为118.44°±9.8°，在相关性分析中与术后胫骨后倾（11.78°±6.2°）显著相关（R = 0.451，p = 0.002）。术后最大屈曲角度与股骨后髁偏移差异（3.24±3.862 mm，R = 0.105，p = 0.493）和股骨后髁偏移比率差异（0.039±0.029 mm，R = -0.163，p = 0.284）之间无统计学关系。
牺牲PCL的TKA术后膝关节的最大屈曲角度与术后胫骨后倾显著相关。因此，胫骨后倾可被视为影响牺牲PCL的TKA术后最大屈曲角度的一个因素。
