Orthognathism

Part of speech: noun

Definitions

1. The state in which there is an ideal positioning of the jaws and dental arches contributes to both functional biting and aesthetic facial appearance
2. The condition involving the alignment of the jaws and teeth allows for optimal biting functionality and enhances the overall aesthetic of the face
3. A jaw and dental arch positioning that maximizes functional biting capabilities while also improving the facial aesthetic defines this state

Etymology: Orthognathism is built from "ortho-", the Greek prefix meaning "straight" or "correct", and "-gnathism", from the Greek "gnathos", meaning "jaw". Its immediate models are the adjectives "orthognathic" and "orthognathous", which describe jaws that sit in a straight, non-projecting line. The noun was formed from those adjectives, so it names the condition itself rather than the adjective's description of a jaw. The pattern is a modern one. Words ending in "-gnathous" and "-gnathic" come from the same Greek root and belong to the technical vocabulary of anatomy and dentistry, where they are used to classify jaw shapes. The Greek "gnathos" also appears in "prognathism", the opposite condition in which the jaws project forward, so "orthognathism" sits alongside it as one end of the same classification.