The influence of preoperative deformity on intraoperative soft tissue balance in posterior-stabilized total knee arthroplasty.

摘要

Using a tensor for total knee arthroplasty (TKA) enabling soft tissue balance measurements with a reduced patellofemoral joint and femoral component in place, we examined the influence of preoperative deformity on intraoperative soft tissue balance during posterior-stabilized TKA at 0 degrees , 10 degrees , 45 degrees , 90 degrees , and 135 degrees of flexion in 60 varus-type osteoarthritic patients. Despite more than 20 degrees of preoperative varus deformity influencing intraoperative ligament balance in varus, joint gap showed no significant difference regardless of the amount of preoperative varus deformity. Accordingly, even in pre-operative severe varus deformed knees, gap balancing can be adjusted during PS TKA.