Medical Dictionary

aligner

noun align·er \ ə-ˈlī-nər \

medical Definition of aligner

:a clear, plastic orthodontic appliance that is molded to fit over the teeth and is used to correct their alignment
  • The aligners are made in a series: When the patient's teeth have been moved a tiny bit by one aligner, the next aligner goes in and moves them a bit further.
  • —Fred ReedThe Washington Times15 May 2003

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