Modeling and simulation of tendon transfer for pinch task

Overview & Synopsis

This work displayed the maximum magnitude of the fingertip force required to secure objects following paralysis, rupture of extrinsic index extensors and following tendons transfers to assist clinicians in setting realistic expectations for rehabilitating strength of pinch. The optimal combination of tendon tensions that maximize fingertip force was predicted in case of the healthy, the pathological and the reconstructed index finger via a tendon transfer. We used a three-dimensional static biomechanical model based on finger anatomy and numerical optimization technique. The outcomes of the flexor carpi ulnaris (FCU) transfer to extensor communis (EDC), used to restore extension in the index finger, were simulated.