Degenerative disc disease is a common cause for low back pain, and sometimes requires surgical treatment. Total disc replacement (TDR) is one such surgical option performed to remove the painful disc and preserve segmental motion. However, TDR clinical results are not always satisfactory. Altered kinematics and residual low back pain have been reported as frequent poor outcomes. The facet joint is a pure articular joint and can be a pain generator. Although the effect of TDR on ROMs (ranges of motion) and facet contact force is relatively well studied, the influence of TDR on facet capsules has not been clarified yet. The purpose of this study was to evaluate the effect of TDR on facet joint capsule strain.

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