OBJECTIVE: To assess the osteoinductive action of platelet-rich plasma when associated to ceramics in the spine of rats. MATERIAL AND METHOD: Laminectomy was performed in 16 isogenic Lewis rats for posterior ceramic grafting. PRP was prepared intraoperatively using blood collected from two other rats. Study and control groups were set by randomization, with the study group receiving ceramics associated to PRP, and the control group receiving only ceramics. The animals were sacrificed for histopathological analysis after 10 weeks. RESULTS: Strong osteoblastic and osteoclastic activity and full re-absorption of ceramics were found on study group. In control group, small bone islands across fibrous tissue and non-reabsorbed were seen. Discussion: growth factors released by platelets bind to osteoblasts and fibroblasts surfaces, stimulating collagen synthesis to form bone matrix. Activated macrophages keep releasing growth factors and stimulating osteogenesis. CONCLUSION: The use of PRP associated to ceramics showed stronger osteoblastic and osteoclastic activity and full ceramics re-absorption compared to standalone grafting on the spine of rats.
Platelet-rich plasma; Ceramic; Ossification
