Unerupted third molars.
D006801:Humans; D008964:Molar, Third / Q000601:surgery*; D010497:Pericoronitis / Q000150:complications; D010508:Periodontal Abscess / Q000150:complications; D014095:Tooth, Impacted / Q000601:surgery; D014097:Tooth, Unerupted / Q000601:surgery*