orthodontics
noun
or·tho·don·tics
ˌȯr-thə-ˈdän-tiks
plural in form but singular in construction
: a branch of dentistry dealing with irregularities of the teeth (such as malocclusion) and their correction (as by braces)
also
: the treatment provided by a specialist in orthodontics
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Merriam-Webster unabridged
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