title: A retrospective analysis of factors influencing the success of autotransplanted posterior teeth.
abstract: BACKGROUND
  Survival and success rates of tooth transplantations even after long follow-up periods have been shown to be very high. Nevertheless, it is important to analyse factors potentially influencing these rates. The aim of this study was to assess the influence on success of potential factors.
  
  
  METHODS
  The research was based on a retrospective analysis of clinical and radiological data from a sample of 59 subjects (75 transplanted teeth). The follow-up period varied from 0.44 to 12.28 years (mean 3.95 years). Success rates were calculated and depicted with Kaplan-Meier plots. Log-rank tests were used to analyse the effect of root development stage, apex width, the use of enamel matrix proteins or the surgeon on success of transplantations.
  
  
  RESULTS
  Results for success of premolar transplantations were comparable with already published data, while molars performed worse than shown in other studies. The surgeon performing the transplantation (p = 0.001) and tooth type (p ≤ 0.001) were significantly associated with transplantation success. Use of enamel matrix proteins (p = 0.10), root development stage (p = 0.13), the recipient area (p = 0.48) and apex width (p = 0.59) were not significantly associated with success.
  
  
  CONCLUSIONS
  Molar transplantations were not as successful as premolar transplantations; however, success rates varied greatly depending on the surgeon's experience. The use of enamel matrix proteins as well as root development stage, the recipient area and apex width did not show significant associations with success of tooth transplantations.
authors.affiliation: Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, Faculty of Medicine, University of Zürich, Zürich, Switzerland. mirco.ronchetti@gmx.ch.
authors.forename: Mirco F
authors.initials: MF
authors.lastname: Ronchetti
authors.affiliation: Clinic of Oral Surgery, Center of Dental Medicine, Faculty of Medicine, University of Zürich, Zürich, Switzerland.
authors.forename: Silvio
authors.initials: S
authors.lastname: Valdec
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, Dental School/Medical Faculty, University of Bern, Bern, Switzerland.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Pandis
authors.affiliation: Clinic of Oral Surgery, Center of Dental Medicine, Faculty of Medicine, University of Zürich, Zürich, Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Locher
authors.affiliation: Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, Faculty of Medicine, University of Zürich, Zürich, Switzerland.
authors.forename: Hubertus
authors.initials: H
authors.lastname: van Waes
mesh_terms: D000293:Adolescent; D064592:Autografts / Q000637:transplantation*; D001641:Bicuspid / Q000637:transplantation; D002648:Child; D002983:Clinical Competence; D003746:Dental Enamel Proteins / Q000627:therapeutic use; D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D005500:Follow-Up Studies; D006801:Humans; D008963:Molar / Q000637:transplantation; D009805:Odontogenesis / Q000502:physiology; D011183:Postoperative Complications; D012189:Retrospective Studies; D012391:Root Resorption / Q000209:etiology; D015996:Survival Rate; D014070:Tooth / Q000637:transplantation*; D020254:Tooth Ankylosis / Q000209:etiology; D019227:Tooth Apex / Q000033:anatomy & histology; D014092:Tooth Root / Q000254:growth & development; D019553:Tooth, Nonvital / Q000209:etiology; D016896:Treatment Outcome
chemical_list: D003746:Dental Enamel Proteins; C109069:enamel matrix proteins
keywords: Success factors; Survival; Tooth transplantation