Lee O-Sung, Elazab Ashraf, Lee Yong Seuk
Department of Orthopaedic Surgery, Mediplex Sejong Hospital, Incheon, Korea.
Department of Orthropaedic Surgery, Dammam Medical Complex, Dammam, Saudi Arabia.
Knee Surg Relat Res. 2019 Mar 1;31(1):12-18. doi: 10.5792/ksrr.18.033.
The purpose of this study was to compare the predictive value of the valgus stress angle (SA), varus SA and varus-valgus SA difference (VVD) in predicting the degree of medial release in varus deformity during total knee arthroplasty (TKA).
One hundred eight TKAs (78 patients), which were performed in primary osteoarthritis with varus knee deformity, were retrospectively classified into three groups according to the degree of medial release (group A, mild release; group B, moderate release; and group C, severe release). Medical charts were reviewed, and long weight bearing standing anteroposterior radiographs and varus-valgus stress radiographs were evaluated.
The valgus SA was significantly different between group A and B and between group A and C. However, it was not significantly different between group B and C. The varus SA was significantly different between group B and C and between group A and C. However, it was not significantly different between group A and B. The VVD was significantly different in all intergroup comparisons.
Evaluation of the VVD is more valuable in predicting the degree of medial release in TKA performed in varus knee deformity than evaluation of the simple valgus and varus SA.
本研究旨在比较外翻应力角（SA）、内翻SA以及内外翻SA差值（VVD）在预测全膝关节置换术（TKA）中内翻畸形时内侧松解程度方面的预测价值。
回顾性分析108例（78例患者）因原发性骨关节炎伴内翻膝关节畸形而进行的TKA病例，根据内侧松解程度将其分为三组（A组，轻度松解；B组，中度松解；C组，重度松解）。查阅病历，并对负重位站立前后位X线片和内外翻应力位X线片进行评估。
A组与B组之间以及A组与C组之间的外翻SA存在显著差异。然而，B组与C组之间无显著差异。B组与C组之间以及A组与C组之间的内翻SA存在显著差异。然而，A组与B组之间无显著差异。所有组间比较中VVD均存在显著差异。
在预测内翻膝关节畸形患者行TKA时的内侧松解程度方面，评估VVD比单纯评估外翻和内翻SA更有价值。
