title: A 5-year retrospective study of cobalt-chromium-based fixed dental prostheses.
abstract: OBJECTIVE
  The aim of this retrospective study was to evaluate the 5-year clinical outcome for ceramic veneered cobalt-chromium (Co-Cr) fixed dental prostheses (FDPs) fitted in a private clinical setting.
  
  
  METHODS
  All patients treated consecutively with Co-Cr FDPs from January 2000 to November 2005 were included, and complications were registered. Patient records were examined for details on the restorations and abutment teeth. A total of 149 patients with 201 FDPs, 1,135 units, and 743 abutment teeth were recorded.
  
  
  RESULTS
  Of the 149 patients, 122 (82%) were followed for 5 years. Complications occurred in 34 patients (23%) and 38 FDPs (19%). The most frequent were caries (6.7% of patients, 5% of FDPs, 2.2% of abutments) and cement failure (6.7% of patients, 5% of FDPs, 3.1% of abutments). Cohesive ceramic fractures occurred in only 7 FDPs (3.5% of FDPs, 0.7% of units). No adhesive ceramic fractures were recorded. The 5-year cumulative rates for success and survival were 83.8% and 92.8%, respectively.
  
  
  CONCLUSIONS
  Co-Cr FDPs appear to be a promising prosthodontic treatment modality, presenting low incidence of complications and a high survival rate during the first 5 years of function. However, long-term randomized controlled studies are necessary to confirm these findings.
authors.affiliation: Department of Prosthetic Dentistry/Dental Materials Science, Institute of Odontology, Sahlgrenska Academy, Universisty of Gothenburg, SE 40530 Gothenburg, Sweden. per.svanborg@odontologi.gu.se
authors.forename: Per
authors.initials: P
authors.lastname: Svanborg
authors.forename: Lena
authors.initials: L
authors.lastname: Längström
authors.forename: Ritva Moisio
authors.initials: RM
authors.lastname: Lundh
authors.forename: Göran
authors.initials: G
authors.lastname: Bjerkstig
authors.forename: Anders
authors.initials: A
authors.lastname: Ortorp
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002484:Cementation; D002858:Chromium Alloys / Q000737:chemistry*; D000044:Dental Abutments / Q000706:statistics & numerical data; D003731:Dental Caries / Q000209:etiology; D003738:Dental Cements / Q000737:chemistry; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry; D019232:Dental Restoration Failure / Q000706:statistics & numerical data; D003801:Dental Veneers; D003779:Denture Design; D003780:Denture Repair; D003830:Denture, Partial, Fixed / Q000145:classification / Q000706:statistics & numerical data; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011176:Post and Core Technique; D019233:Retreatment; D012189:Retrospective Studies; D012390:Root Canal Therapy / Q000706:statistics & numerical data; D016019:Survival Analysis; D019553:Tooth, Nonvital / Q000534:rehabilitation; D016896:Treatment Outcome
chemical_list: D002858:Chromium Alloys; D003738:Dental Cements; D003776:Dental Porcelain