collapse of dental arch

col·lapse of den·tal arch

movement of teeth to fill a space that would normally be filled by another, missing tooth, creating a malpositioning of adjacent and opposing teeth.

col·lap·se of den·tal arch

(kŏ-laps dentăl ahrch)
Movement of teeth to fill a space normally filled by another, missing tooth, and so a malpositioning adjacent and opposing teeth.