Many trauma surgeries and reconstructive surgeries involve re-establishment of a bone-tendon(B-T) junction, such as direct repair for patellar-tendon-patella or indirect B-T repair bycreating a tunnel such as using patellar graft for ACL reconstruction (Hung et al. 1993, Chanet al. 2000a,b). But direct B-T junction repair is slow due to poor regenerative capability of itsinsertion fibrocartilage zone (Qin et al. 1999, Leung et al. 2002, Wong et al. 2003). Theimmobilization period is also long and the adverse effects on the affected musculoskeletaltissues are obvious (Qin et al. 1997, Leung et al. 1999). How to accelerate or enhance the B-Tjunction repair therefore becomes a focus of our musculoskeletal research laboratory, withinitiation of Prof. KS Leung in early 90th of last century.