title: Concrescence of permanent maxillary second and third molars: case report of non-surgical root canal treatment.
abstract: Concrescence is a rare developmental anomaly with an overall incidence of 0.8% in the permanent dentition. While many case reports describe the treatment of concrescence with extraction, there are few reports of non-surgical root canal treatment (NSRCT), due to the atypical root form, canal morphology, and technical difficulties involved in concrescence. This unique case report describes a technical modification of NSRCT that can retain joined posterior maxillary teeth to maintain natural posterior occlusion without surgical intervention or dental implants, thereby avoiding the risk of damage to a large portion of the alveolar bone near the maxillary sinus.
authors.affiliation: Department of Endodontics, New York University College of Dentistry, NY 10010, USA. df67@nyu.edu
authors.forename: Denise
authors.initials: D
authors.lastname: Foran
authors.forename: Takashi
authors.initials: T
authors.lastname: Komabayashi
authors.forename: Louis M
authors.initials: LM
authors.lastname: Lin
mesh_terms: D000328:Adult; D003786:Dental Pulp Cavity / Q000002:abnormalities; D005260:Female; D005671:Fused Teeth / Q000628:therapy*; D006801:Humans; D008437:Maxilla; D008963:Molar / Q000002:abnormalities; D012390:Root Canal Therapy / Q000379:methods*; D014092:Tooth Root / Q000002:abnormalities