Tsubosaka Masanori, Takayama Koji, Oka Shinya, Muratsu Hirotsugu, Kuroda Ryosuke, Matsumoto Tomoyuki
Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Department of Orthopaedic Surgery, Kobe Kaisei Hospital, Kobe, Japan.
J Orthop Sci. 2017 Nov;22(6):1071-1076. doi: 10.1016/j.jos.2017.08.011. Epub 2017 Sep 1.
This study aimed to clarify the influence of the posterior condylar offset (PCO) on intraoperative soft tissue balance including the joint component gap and varus ligament balance measured by an offset-type tensor during posterior-stabilized (PS) total knee arthroplasty (TKA).
In this study, 35 patients with osteoarthritis of the knee underwent PS TKA. Intraoperative soft tissue balance including the joint component gap and varus/valgus ligament balance were assessed at 0°, 10°, 45°, 90°, and 135° of flexion with an offset-type tensor that could be used with the femoral component placement and patellofemoral joint reduction. The correlations between the postoperative PCO and the intraoperative soft tissue balance parameters were assessed using simple regression analysis.
The joint component gap at 0° extension was inversely correlated with the PCO (R = -0.41, p < 0.05). The joint component gap of 10°-0° was positively correlated with the PCO (R = 0.35, p < 0.05). No other soft tissue balance parameters were correlated with the PCO.
A larger PCO was confirmed to reduce joint component gap in extension but not always in flexion in PS TKA.
本研究旨在阐明后髁偏移（PCO）对后稳定型（PS）全膝关节置换术（TKA）术中软组织平衡的影响，包括通过偏移型张量测量的关节组件间隙和内翻韧带平衡。
本研究中，35例膝关节骨关节炎患者接受了PS TKA。使用可与股骨组件放置和髌股关节复位配合使用的偏移型张量，在0°、10°、45°、90°和135°屈曲位评估术中软组织平衡，包括关节组件间隙和内翻/外翻韧带平衡。采用简单回归分析评估术后PCO与术中软组织平衡参数之间的相关性。
伸直0°时的关节组件间隙与PCO呈负相关（R = -0.41，p < 0.05）。10°-0°的关节组件间隙与PCO呈正相关（R = 0.35，p < 0.05）。没有其他软组织平衡参数与PCO相关。
在PS TKA中，证实较大的PCO会减小伸直位的关节组件间隙，但屈曲位不一定。
