Orthodontist (noun)

A dentist who specializes in the diagnosis, prevention, and treatment of dental and facial irregularities.

Origin:

From the greek words "orthos" meaning "straight" and "odous" meaning "tooth" and "-ist" meaning "a person who practices".

Examples:

1. He went to the orthodontist to have braces put on his teeth.
2. The orthodontist explained the treatment plan for the patient's overbite.
3. She had a consultation with the orthodontist to discuss options for correcting her crooked teeth.
4. The orthodontist was able to straighten his teeth using Invisalign aligners.
5. The orthodontist recommended a retainer to prevent the teeth from shifting after the braces were removed.