PURPOSE: To study the effect of the calcitonina in the repair of femoral defect fulfilled with bovine bone devitalized matrix and calcitonin in rats. METHODS: Forty eight adult male Wistar rats were distributed into two group with 24 animals. Bilateral femoral defects with 2mm of diameter were produced in the femoral shaft and fulfilled with bovine bone devitalized matrix. The experimental group received calcitonin 0,05mL intramuscular, in the immediate postoperative period; the control group received 0,05mL of saline solution. The animals were sacrificed with 7, 14 and 21 days and the femurs were submitted the clinical, microscopic and histometric evaluation. The data was submitted a statistical evaluation with Student "t", Kruskal-Wallis and Mann-Whitney. RESULTS: The clinical results didn't show difference between the control and experimental groups. In the optical microscopy the defects showed inflammatory reaction and active bony formation in the proximities of the bovine bony fragments. The quantitative analysis showed larger bony formation in the initial phases of the reparative osteogenesis in the experimental group (Z=4,82 and Z=4,43), without differences in relation to the inflammatory reaction in both groups. CONCLUSION: The calcitonina and the fulfillment of defect with bovine bone devitalized matrix enhance bone formation and no decrease inflammatory reaction in the 7 and 14 postoperative period.
Autograft; Bovine bone; Calcitonin; Rats
