Use of a Tensor with a Navigation to Assess the Accuracy of the Soft- Tissue Balance in Total Knee Arthroplasty

Introduction One of important factors to achieve stable postoperative results is to obtain proper soft tissue balance at the time of total knee arthroplasty (TKA). With a goal of accurate gap balance during TKA, we developed a tensor called Joint Dependent Kinematics (JDKmini II, Stryker, Tokyo, Japan) and presented the tensor in this meeting last year. Computer navigation has been proven to be a useful tool to improve the accuracy of component placement and the alignment in TKAs. To evaluate the intra-operative preciseness of the tensor, we compared the data of joint gap and soft tissue balance on the tensor with those on the navigation system.