Nagai Kanto, Muratsu Hirotsugu, Matsumoto Tomoyuki, Miya Hidetoshi, Kuroda Ryosuke, Kurosaka Masahiro
Department of Orthopaedic Surgery, Steel Memorial Hirohata Hospital, Himeji, Japan.
Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
J Arthroplasty. 2014 Mar;29(3):520-4. doi: 10.1016/j.arth.2013.07.025. Epub 2013 Aug 29.
The influence of joint distraction force on intraoperative soft tissue balance was evaluated using Offset Repo-Tensor® for 78 knees that underwent primary posterior-stabilized total knee arthroplasty. The joint center gap and varus ligament balance were measured between osteotomized surfaces using 20, 40 and 60 lbs of joint distraction force. These values were significantly increased at extension and flexion as the distraction force increased. Furthermore, lateral compartment stiffness was significantly lower than medial compartment stiffness. Thus, larger joint distraction forces led to larger varus ligament balance and joint center gap, because of the difference in soft tissue stiffness between lateral and medial compartments. These findings indicate the importance of the strength of joint distraction force in the assessment of soft tissue balance, especially when using gap-balancing technique.
使用Offset Repo-Tensor®对78例接受初次后稳定型全膝关节置换术的膝关节评估关节牵张力对术中软组织平衡的影响。使用20磅、40磅和60磅的关节牵张力测量截骨面之间的关节中心间隙和内翻韧带平衡。随着牵张力增加，这些值在伸直和屈曲时均显著增加。此外，外侧间室刚度显著低于内侧间室刚度。因此，由于内外侧间室软组织刚度的差异，更大的关节牵张力导致更大的内翻韧带平衡和关节中心间隙。这些发现表明关节牵张力强度在评估软组织平衡中的重要性，尤其是在使用间隙平衡技术时。
