Dynamic Mechanics Of Anterior Cruciate Ligament: Study Of Correlation Between Anatomy Of Attachment Site And Multi-bundle Fasciculi

Background and purpose: Anterior cruciate ligament (ACL) is one of the most complicated structure in human body. Treatment of ACL injury has been attached more and more importance in recent years. With the gradually elaborated study on mechanical function of ACL in knee joint kinematics, people have realized that current surgical technique could not meet the increasing demand for resuming subtle mechanical function of ACL. To recruit the mechanical function of original ACL and improve the therapeutic effects, ACL should be reconstructed according to its original anatomic structure and mechanical characters.Reconstruction of ACL multi-bundle fasciculi is one of the well developed technique recently. Double-bundle reconstruction of ACL has made progress in recruiting anatomic structure and kinematics restraining function. While because of the complexity of best combination of multi insertion sites and mechanical coordination of fasciculi attached to them,perfect multi-bundle reconstruction of ACL is still difficult to achieve. Up to now, studies on attachment site and fasciculi mechanics are still not enough to illustrate their relationship. Based on the achieved ACL attachment site anatomy and designed new radiology locating method, our study aims to investigate the coordination of attachment sites and dynamic mechanics of ACL 4-bundle fisciculi according to the newly developed Cruciate Ligament Ergometer system. So we can provide more fundamental anatomic data and mechanical parameters.Methods1. (1) An anatomic study using 32 un-paired normal Chinese cadaver knees. The specimens were prepared according to method reported by Tiburtius. Anatomic parameters including center of ACL footprint, excursion angle, longitudinal axis and transversal axis.