FRANKLIN, Tenn.--(BUSINESS WIRE)--BioMimetic Therapeutics, Inc. (NASDAQ: BMTI) today announced that it has received orphan drug designation from the Food and Drug Administration (FDA) for its protein therapeutic, recombinant human platelet derived growth factor (rhPDGF-BB) for the treatment of Osteonecrosis of the Jaw (ONJ). ONJ is a growing problem in the United States in patients receiving high doses of bisphosphonates for the treatment of severe osteoporosis and other diseases. Orphan drug status, designated to drugs that have the potential to treat rare diseases, provides an accelerated path to FDA approval and seven years of market exclusivity.