title: Use of third molar transplantation for closure of the oroantral communication after tooth extraction: a report of 2 cases.
abstract: OBJECTIVE
  This clinical report introduces a promising and unique method for the immediate closure of the oroantral communication (OAC) after tooth extraction: the use of the transplanted third molar with closed apices.
  
  
  METHODS
  In 2 adult patients, OAC caused by the extraction of an upper molar was immediately closed by using a transplanted third molar with complete root formation. After tooth extraction at the recipient site, OAC with perforated mucosa of the sinus floor was confirmed and the donor third molar was transferred to the prepared recipient socket. Endodontic therapy of the transplanted third molar began at 3 weeks after surgery, and prosthetic treatment was completed at 5 months after the operation. These 2 patients were carefully observed both clinically and radiographically.
  
  
  RESULTS
  Closure of the OAC was successfully performed, and the transplanted teeth became fixed with the passage of time in these 2 patients. Root resorption did not occur, and good functional results were obtained without any complications.
  
  
  CONCLUSIONS
  Tooth transplantation of a mature third molar for closure of the OAC is a simple and excellent method because the transplanted tooth not only closes the communication to the maxillary sinus, but it also satisfactorily functions at the recipient site during mastication, even in adult patients.
authors.affiliation: Department of Dentistry and Oral Surgery, Fukui Medical University, Matsuoka, Fukui 910-1193, Japan. ykitagaw@fmsrsa.fukui-med.ac.jp
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Kitagawa
authors.forename: Kazuo
authors.initials: K
authors.lastname: Sano
authors.forename: Mikiko
authors.initials: M
authors.lastname: Nakamura
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Ogasawara
mesh_terms: D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008443:Maxillary Sinus / Q000601:surgery; D008963:Molar / Q000601:surgery; D008964:Molar, Third / Q000637:transplantation*; D009957:Oroantral Fistula / Q000209:etiology / Q000601:surgery*; D010012:Osteogenesis / Q000502:physiology; D011862:Radiography, Panoramic; D012390:Root Canal Therapy; D012391:Root Resorption / Q000517:prevention & control; D014057:Tomography, X-Ray Computed; D014081:Tooth Extraction / Q000009:adverse effects*; D020390:Tooth Socket / Q000601:surgery