RESUMO
OBJECTIVE: To explore the osteogenetic capacity of cross-linked adjustable anti-tuberculosis drug sustained-release artificial composite (TPB/SA-RFP/PLA). METHODS: The model of femur bone defect was established in rabbits.TPB/SA-RFP/PLA complex was implanted into defect parts in the experimental group while TPB/SA/PLA in the blank control group. At Weeks 4, 8 and 12, gross specimens received radiographic, histological and immunohistochemical examinations to determine the osteogenetic performance of TPB/SA-RFP/PLA. RESULTS: As compared with the control group, TPB/SA-RFP/PLA complex had excellent osteogenic capacities while the TPB/SA/PLA group had no obvious osteogenic difference. Lane-sandhu histological and radiographic ratings demonstrated significant difference between TPB/SA-RFP/PLA (8.3 ± 0.3) and blank groups (2.2 ± 0.4) (P < 0.05). And TPB/SA/PLA showed no significant intragroup significance (P > 0.05). Two groups immunohistochemical Alkaline phosphatase was strongly positive in two test groups and weakly positive in the control group. CONCLUSION: TPB/ SA-RFP/PLA has excellent profiles of bone conductivity and regeneration.And the incorporation of rifampin does not affect its osteogenetic capacity.
