title: The prognosis of partial implant-supported fixed dental prostheses with cantilevers. A 5-year retrospective cohort study.
abstract: OBJECTIVE
  To report the outcome of implant-supported fixed partial prostheses with cantilevers at 5 years after loading.
  
  
  METHODS
  A total of 174 patients, 106 females and 68 males with 225 implants (maxilla: 149; mandible: 76), supporting 191 fixed dental prostheses (maxilla: 125; mandible: 66) were included. Inclusion criteria were patients rehabilitated with partial prostheses with cantilevers and sufficient amount of bone to place implants of at least 7 mm long. Primary outcome measures were prosthesis and implant success as well as biological and mechanical complications. The secondary outcome measure was peri-implant marginal bone loss.
  
  
  RESULTS
  Sixteen patients with 21 implants dropped out (9.2% of patients; 9.4% of implants). Three implants were lost in 3 patients. Two prostheses were lost rendering a survival estimation of 99.0% at 5 years (Kaplan-Meyer). Overall mean (standard deviation) bone level was 0.15 mm (0.34 mm), 1.56 mm (0.88 mm) and 1.88 mm (1.05 mm) at implant insertion, and 1 and 5 years after implant placement, respectively. The frequency at patient level of biological and mechanical complications was 2.9% and 27.6%, respectively.
  
  
  CONCLUSIONS
  Within the limitations of this study, it is possible to conclude that it is viable to use fixed implant-supported partial rehabilitation with a cantilever, judging by the 99% prosthetic success rate at 5 years. However, there is a relatively high frequency of complications to cope with in these rehabilitation.
authors.affiliation: Oral Surgery Department, Malo Clinic, Lisbon, Portugal. research@maloclinics.com
authors.forename: Paulo
authors.initials: P
authors.lastname: Maló
authors.forename: Miguel
authors.initials: M
authors.lastname: de Araujo Nobre
authors.forename: Armando
authors.initials: A
authors.lastname: Lopes
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology; D015331:Cohort Studies; D003758:Dental Implantation, Endosseous; D019094:Dental Prosthesis, Implant-Supported / Q000009:adverse effects; D019232:Dental Restoration Failure; D003779:Denture Design; D003830:Denture, Partial, Fixed; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000601:surgery; D008875:Middle Aged; D011379:Prognosis; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome; D055815:Young Adult