Supplemented matrices comprising a PTH releasably incorporated therein, optionally containing a granular material, are described herein. The PTH is incorporated either through covalent linkage to the matrix or through non-covalent interaction with the matrix and/or the granules. These supplemented matrices decrease the time of healing compared to autograft and or trigger healing of bone fractures which otherwise would not heal. The matrices are biocompatible and biodegradable and can be formed in vitro or in vivo, at the time of implantation. The PTH may be a part of a fusion peptide. PTH can be incorporated into the matrices with full retention of its bio-activit y. PTH can be releasably incorporated, using techniques that provide control over how and when and to what degree the PTH is released using the matrix as a controlled release vehicle to heal bone fractures.
