Biomechanics and Motion Analysis

Effect of Gap Size on Gliding Resistance After Flexor Tendon Repair

Principal Investigator: Peter C. Amadio, M.D.
Project Coordinator: Chunfeng Zhao, M.D. — zhao.chunfeng@mayo.edu

Gap formation is a common complication, associated with adhesion formation, tendon rupture, and weakness after flexor tendon repair. The purpose of this study was to investigate the effect of gap formation on tendon gliding resistance after flexor tendon repair in a human cadaver model. The results demonstrated that while most repaired tendons with a 2-mm gap could pass through the A2 pulley, gliding resistance was significantly increased. When the gap reached 3 mm or more, all tendons caught at the A2 pulley edge, causing a dramatically increased gliding resistance.