Prognathism is a descriptive term for a jaw (lower or upper) that protrudes forward beyond the plane of the face.
Update Date 2/25/2014
Updated by: Ilona Fotek, DMD, MS, Palm Beach Prosthodontics Dental Associates, West Palm Beach, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.