Department of Orthopedic Surgery, Veterans Health Service Medical Center, Seoul, South Korea.
J Arthroplasty. 2013 Dec;28(10):1796-800. doi: 10.1016/j.arth.2013.04.043. Epub 2013 May 28.
Achieving rectangular flexion and extension gaps is important during gap balancing technique in total knee arthroplasty (TKA). However, assessment of gaps throughout the range of knee motion is obscure. One hundred knees operated by TKA using a navigation-assisted gap balancing technique were evaluated. Intraoperatively, after achieving rectangular flexion and extension gaps, mediolateral gaps in each flexion angle (0°, 45°, 90°, 120°) were recorded. Patients were divided into 4 groups; Group I: no gap difference (n = 64), Group II: lax in midflexion (n = 20), Group III: lax in deep flexion (n = 8) and Group IV: lax in both midflexion and deep flexion (n = 8). This study demonstrated that significant proportion (36%) of TKA cases had laxity in midflexion (45°) even when rectangular extension (0°)-flexion (90°) gap was achieved.
在全膝关节置换术（TKA）的间隙平衡技术中，实现矩形的屈伸间隙很重要。然而，在膝关节运动的整个范围内评估间隙是不清楚的。本研究评估了 100 例采用导航辅助间隙平衡技术行 TKA 的膝关节。术中，在获得矩形的屈伸间隙后，记录每个屈曲角度（0°、45°、90°、120°）的内外侧间隙。患者被分为 4 组：组 I：无间隙差异（n=64），组 II：中度屈曲时松弛（n=20），组 III：深度屈曲时松弛（n=8），组 IV：中度和深度屈曲时松弛（n=8）。本研究表明，即使在获得矩形的伸展（0°）-屈曲（90°）间隙时，仍有相当比例（36%）的 TKA 病例在 45°时存在松弛。
