The effects on the lower third molar of the extraction of the lower second molar.
D003970:Diastema; D005500:Follow-Up Studies; D006801:Humans; D008963:Molar / Q000601:surgery; D009973:Orthodontics, Preventive / Q000379:methods*; D014081:Tooth Extraction; D014083:Tooth Germ; D014095:Tooth, Impacted / Q000517:prevention & control