noun
a dentist who specializes in the prevention, diagnosis, and treatment of diseases affecting the gums and supporting structures of the teeth
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I have an appointment with the periodontist next week to discuss my gum health.
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I'm seeing the periodontist tomorrow for a check-up on my gums.
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I gotta go to the periodontist to get my gums checked out.
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The periodontist is like a dentist specialized in gum care.