Spring Ligament Tear Decreases the Ankle and Talonavicular Joint Reaction Forces: Biomechanical Study of the Tibiocalcaneonavicular Ligament Reconstruction

摘要

Category:OtherIntroduction/Purpose:Spring ligament tear is often noted in advanced stages of the adult acquired flatfoot deformity (AAFD). Previous anatomic studies demonstrated that the spring and deltoid ligaments are not separate structure, but form a confluent ligament in which the tibiocalcaneonavicular ligament (TCNL) comprises the largest component. A biomechanical study which utilized stage IIB AAFD model demonstrated inferior result of the anatomic spring ligament reconstruction compared to the tibionavicular ligament reconstruction. Therefore, the TCNL reconstruction has been proposed for effective restoration of the ankle and talonavicular joints stability in AAFD with a large spring ligament tear. We aimed to investigate if spring ligament tear of greater than 1.5 cm decreases the ankle and talonavicular joint reaction forces (JRF), and if they could be restored by the TCNL reconstruction.Methods:Ten fresh-frozen human cadaveric lower legs were obtained and disarticulated at the knee joint. St...