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The aim of the present study was to histologically analyze the effects of bovine and human demineralized bone matrix and a Ricinus communis polymer on the bone regeneration process. Two surgical bone defects were created in rabbit calvaria, one on the right and the other on the left side of the parietal suture. Eighteen rabbits were divided into three groups. In Group I, the experimental defect was treated with bovine demineralized bone matrix, Group II with human demineralized bone matrix, and in Group III, the experimental cavity was treated with polyurethane resin derived from Ricinus communis oil. The control defects were filled with the animals' own blood. The animals were sacrificed after 7 and 15 weeks. Histological analysis revealed that in all groups (control and experimental), bone regeneration increased with time. The least time required for bone regeneration was noted in the control group, with a substantial decrease in the thickness of the defect. All materials proved to be biologically compatible, but polyurethane resorbed more slowly and demonstrated considerably better results than the demineralized bone matrices.

Effects of demineralized bone matrix and a ‘Ricinus communis’ polymer on bone regeneration: a histological study in rabbit calvaria