Department of Orthopaedic Surgery, Breach Candy Hospital, Mumbai, India.
J Arthroplasty. 2013 Jan;28(1):20-7. doi: 10.1016/j.arth.2012.04.014. Epub 2012 Jun 5.
We prospectively studied variations in valgus correction angle (VCA) and the influence of preoperative limb deformity on VCA in 503 consecutive total knee arthroplasties done in 393 patients. The percentage of limbs that had VCA values less than 5° was 10.9%, and that with VCA values greater than 7° was 44.9%. The percentage of limbs with VCA greater than 7° was significantly more in varus knees, and that with VCA less than 5° was significantly more in valgus knees; preoperative deformity showed a significant correlation with VCA. Choosing a fixed-routine VCA of 5° to 7° may cause an unacceptable planning error that may be minimized by individualizing VCA or using computer navigation.
我们前瞻性地研究了 393 名患者的 503 例连续全膝关节置换术中的外翻校正角（VCA）变化，以及术前肢体畸形对 VCA 的影响。VCA 值小于 5°的肢体比例为 10.9%，VCA 值大于 7°的肢体比例为 44.9%。VCA 值大于 7°的肢体在膝内翻中明显更多，VCA 值小于 5°的肢体在膝外翻中明显更多；术前畸形与 VCA 有显著相关性。选择固定常规 VCA 为 5°至 7°可能会导致不可接受的规划错误，通过个体化 VCA 或使用计算机导航，可将这种错误最小化。
