This invention provides a novel medical appliance for repairing, regenerating, maintaining, and/or augmenting a bone. The medical appliance generally includes an osteoinductive agent, an osteoinductive enhancer, and a carrier matrix. Also disclosed are methods, compositions, kits, and bone matrix formulations for regenerating, maintaining, and/or augmenting a bone. Exemplary preferred osteoinductive agents include growth factors such as BMP and TGF-β. Exemplary preferred osteoinductive enhancers include phytoestrogens such as naringin.