title: Case # 1. Maxillary first molar retreatment.
authors.forename: Carl
authors.initials: C
authors.lastname: Newton
mesh_terms: D003751:Dental Fistula / Q000628:therapy; D003786:Dental Pulp Cavity / Q000473:pathology; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla; D008875:Middle Aged; D008963:Molar / Q000473:pathology*; D010482:Periapical Abscess / Q000628:therapy; D019233:Retreatment; D012390:Root Canal Therapy / Q000379:methods*; D016896:Treatment Outcome