The study of the causes and treatment of conditions related to malposition of the bones of the jaws. ... Origin: ortho-+ G. Gnathos, jaw ... (05 Mar 2000) ... 
(or″thog-nath´e-ә) the science dealing with the cause and treatment of malposition of the bones of the jaw. adj., orthogna´thic., adj.
Type: Term Pronunciation: ōr′thōg-năth′ē-ă Definitions: 1. The study of the causes and treatment of conditions related to malposition of the bones of the jaws.
orthognathia A specialty dealing with the etiology (the causes or origins) and treatment of abnormal relationships between the bones of the jaws.