title: Clinical outcome of Brånemark System implants of various diameters: a retrospective study.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the outcome of the 3 different diameters of Brånemark System implants, with special focus on the 5.0-mm-diameter implant.
  
  
  METHODS
  Ninety-eight patients (99 jaws) with a mean age of 62 years were included in this retrospective report. The mean follow-up period was 2 years and 8 months. A total of 379 Brånemark System implants (3.75 mm diameter, n = 146; 4.0 mm diameter, n = 76; 5.0 mm diameter, n = 157) were placed in 29 edentulous and 70 partially edentulous jaws.
  
  
  RESULTS
  Eight of the 146 implants in the 3.75-mm-diameter group failed (5.5%). The corresponding figures for the 4.0- and 5.0-mm-diameter implants were 3 of 76 (3.9%) and 7 of 157 (4.5%), respectively.
  
  
  CONCLUSIONS
  All failures were recorded in maxillae, ie, 18 of the 298 placed, and the majority of these were found in bone quantity group B and quality group 2. Only 3 implants of 131 failed in bone judged as quality 4. The marginal bone loss was low for the 3 implant diameter groups.
  
  
  CONCLUSIONS
  The favorable outcome in bone of poor quality is ascribed partly to the use of an adapted preparation technique and extended healing periods for achievement of the best primary and secondary implant stability possible.
authors.affiliation: The Brånemark Clinic, Public Dental Health Service, Faculty of Odontology, Göteborg University, Sweden. bertil.friberg@vgregion.se
authors.forename: Bertil
authors.initials: B
authors.lastname: Friberg
authors.forename: Annika
authors.initials: A
authors.lastname: Ekestubbe
authors.forename: Lars
authors.initials: L
authors.lastname: Sennerby
mesh_terms: D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging; D015519:Bone Density; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000601:surgery; D007576:Jaw, Edentulous, Partially / Q000000981:diagnostic imaging / Q000601:surgery; D015993:Life Tables; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging / Q000601:surgery; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D016348:Osseointegration; D011859:Radiography; D012189:Retrospective Studies; D013223:Statistics as Topic; D013499:Surface Properties; D016896:Treatment Outcome; D014945:Wound Healing
chemical_list: D015921:Dental Implants