A biodegradable implant for placement in nonunion bone fractures as a substitute for bone
graft material is provided which is a flat plate or disk having a thickness of between about 1
mm and about 15% of the length of the bone, interconnected micropores, and canals
substantially equivalent in size and spacing to naturally-occurring Haversian canals. The
implant may additionally comprise additives such as growth factors, including bone
morphogenic protein. In a preferred embodiment the implant is formed from a biodegradable …