This invention relates to a process to facilitate osteochondral bone remodeling in a subject by inducing regeneration of this bone to a healthy, vascularized state capable of supporting the underlying hyaline cartilage of articular joints and spinal discs, both biomechanically and metabolically and to deliver a bioactive agent. This process involves the steps of: administering an effective amount of an injectable in situ curing biomaterial composite to a site. The biomaterial composite product is prepared by a process involving the steps: admixing an alginate solution with a nonporous aggregate of β-tricalcium phosphate, in a sufficient amount to initiate polymerization of the alginate solution, to form a hydrogel having from between 10 to 20 percent by volume of β-tricalcium phosphate.