Experimental study on integration of artificial ligament with bone interface / 中国矫形外科杂志

ABSTRACT

[Objective]To reconstruct anterior cruciate ligament (ACL) by using ligament advanced reinforcement system(LARS),and to investigate the integration of LARS artificial ligament with bone interface in the animals with regard to imageology, biomechanics and histology.[Method]Twenty-four Boer goats were randomly divided into three groups. The animal mode of ACL reconstruction was established by clinical ACL reconstruction system. Gross observation was made, and histological, imageological and biomechanical changes were observed at 4, 8 and 12 weeks after surgery, respectively. Statistical analysis was performed.[Result](1)At 4 weeks after surgery,ligament-bone interface had great amount of loose bindweb and infiltration of chronic inflammation cells. At 8 weeks after surgery, there was new bone formation. Part of samples had Sharpey fibers. At 12 weeks after surgery, Sharpey fibers.and a large number of fibroblasts were noted in the interface between LARS artificial ligament and bone interface. But calcified cartilage was not founded.(2)The imageology examination for group 3 was made at 4, 8 and 12 weeks after surgery. The data were analyzed statistically by the image processing software of eflime,and there was evident statistical difference (P0.05 ) .[Conclusion]After ACL reconstruction by LARS artificial ligament, indirect connection developed via Sharpey fibers in bone tunnel at the end of LARS artificial ligament and bone interface. The integration of LARS artificial ligament with bone interface has been improved and its intensity is increased.