Abstract
Suspensory fixation methods including endobutton, post and suture disc with hamstring grafts are commonly used in anterior cruciate ligament (ACL) reconstruction. But the phenomenon of bone tunnel enlargement has been usually found in cases with suspensory fixation and accelerated rehabilitation [10]. It was considered that tendon graft motion in the bone tunnel produced by long-distance fixation and cyclic loading led to failure of tendon-bone interface healing. It has been recognised by more and more authors that enhancing and accelerating healing of the tendon graft in the bone tunnel is of importance to prevent reconstruction failure during cyclic loading of the graft after surgery prior to conversion from mechanical to biological fixation [10]. Some substances that influence bone-tendon healing have been studied including cell factor, hyaluronan and osteoconductive calcium phosphate ceramics, but most of them only enhanced the bonding through an indirect connection which was unlike the normal ACL insertion. In this study, osteoinductive calcium phosphate biomaterials were used to enhance early bonding between tendon and bone. The purpose of this study was to research the healing pattern of tendon in a bone tunnel with suspensory fixation and to explore the influence of osteoinductive calcium phosphate ceramics (OICPC) on tendon-bone bonding.
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