Prognathism is a descriptive term for a jaw (lower or upper) that protrudes forward beyond the plane of the face.
Review Date 2/5/2018
Updated by: Ilona Fotek, DMD, MS, Dental Healing Arts, Jupiter, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.