: 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 Reed, The Washington Times

Dictionary Entries Near aligner

Cite this Entry

“Aligner.” Medical Dictionary, Merriam-Webster, Accessed 23 Jul. 2024.

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