Soft tissue tension in extension in total knee arthroplasty affects postoperative knee extension and stability. Knee Surg Sports Traumatol Arthr 16, 999–1003 (2008) doi:10.1007/s00167-008-0591-1

Soft tissue tension in extension in total knee arthroplasty affects postoperative knee extension and stability

Asano, H., Muneta, T. & Sekiya, I.
Knee

The purpose of this study was to assess correlation of soft tissue tension in extension with postoperative extension deficit and valgus/varus instability. Sixty-four osteoarthritic knees that underwent primary total knee arthroplasty were investigated. Soft tissue tension in extension was measured during operation with a balancer/tensor device. Extension deficit was measured, and valgus/varus laxity was assessed by stress radiographs in extension and 30°-flexion 1 year after operation. The extension deficit became larger with an increase of soft tissue tension a year after operation. (P < 0.05) The varus laxity in extension and 30°-flexion and valgus laxity in 30°-flexion became smaller with an increase of soft tissue tension (P < 0.05). Our results demonstrated that soft tissue tension during operation affects postoperative knee extension and stability.


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