The Effect of Progressive Extensor Retinaculum Excision on Wrist Biomechanics and Bowstringing.

Purpose: To quantify the effect of the extensor retinaculum in preventing bowstringing and extensor lag.

Methods: The extensor carpi radialis brevis (ECRB) and extensor digitorum communis (EDC) tendons to the middle finger were isolated in 6 human cadaveric specimens. Extensor tendon excursion and bowstringing were measured as the extensor retinaculum was serially excised.

The effect of posterior decompressive procedures on segmental range of motion after cervical total disc arthroplasty.

Study Design: We quantified the segmental biomechanics of a cervical total disc replacement (TDR) before and after progressive posterior decompression. We hypothesized that posterior decompressive procedures would not significantly increase range of motion (ROM) at the index TDR level.

Objective: To quantify the kinematics of a cervical total disc replacement (TDR) before and after posterior cervical decompression.