Enxerto osteocondral autógeno associado ao IGF-1 em lesão induzida na cartilagem articular de coelhos

Abstract

This study is divided into two chapters. The first one is a brief introduction and general theoretical reference with the intent to present the objectives and hypotheses, and justify this scientific work. The second chapter is presented in the form of a scientific paper. The research aimed to evaluate the effectiveness of the insulin-like growth factor type 1 (IGF-1) in combination with autogenous osteochondral graft, intact or macerated format, in the repair of osteochondral defects induced in the femoral trochlear groove of rabbits. Seventeen New Zealand rabbits were used. The 34 stifle joints were separated into four groups, which autogenous osteochondral autografts were used in intact or macerated format, associated with IGF-1 or saline solution as a control. The animals underwent grafting procedure at six months of age in both joints and were evaluated by orthopedic, radiographic, macroscopic, histological and immunohistochemical analyses. Euthanasia was performed at 6 and 12 weeks postoperatively. Although not observed significant differences between the groups evaluated in clinical, macroscopic, histological and immunohistochemical analyzes, it was observed that IGF-1 stimulated the process of resorption and substitution of the osteochondral graft, which favored the tissue repair. In the radiographic evaluation there was a significantly better articular surface filling in groups with IGF-1. By immunohistochemical it was observed that, regardless of the addition of IGF-1 or the graft format, type 2 collagen production was adequate in the repair cartilaginous tissue.