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Background: It is known that bone healing was delayed in the presence of osteoporosis in humans.However, due to the complexities of the healing of osteoporotic fractures, animal models may be more appropriate to study the effects of osteoporosis in more details and to test drugs on the fracture repair process.The purpose of this study was to investigate the influence of ovariectomy-induced osteoporosis in bone healing in an open femoral osteotomy model, and to test the feasibility of this model for evaluating the healing process under osteoporotic conditions.