Crossword clue: the branch of dentistry dealing with the prevention or correction of irregularities of the teeth

The most common answer is orthodontia (11 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

orthodontia 11 letters wn-def

the branch of dentistry dealing with the prevention or correction of irregularities of the teeth

orthodontics 12 letters wn-def

the branch of dentistry dealing with the prevention or correction of irregularities of the teeth