title: A 5-year retrospective study of cobalt-chromium-based single crowns inserted in a private practice.
abstract: The aim of this retrospective study was to evaluate the clinical performance of cobalt-chromium (Co-Cr) single crowns. Ninety restorations were placed in 55 patients, and follow-up examinations were performed annually for 5 years. Six patients (8 crowns) were regarded as dropouts. During the follow-up period, 15 (17%) crowns/abutment teeth experienced some type of complication; 8 (9%) of these were regarded as failures. The cumulative survival rate was estimated at 90.3% over 5 years, though only 3 (3%) crowns had complications that could be related to the crown material. The results suggest that Co-Cr single crowns are a promising alternative to other alloys used in fixed prosthodontics.
authors.affiliation: Department of Prosthetic Dentistry, The Sahlgrenska Academy, University of Gothenburg, Goteborg, Sweden. anders.ortorp@odontologi.gu.se
authors.forename: Anders
authors.initials: A
authors.lastname: Ortorp
authors.forename: Aron
authors.initials: A
authors.lastname: Ascher
authors.forename: Per
authors.initials: P
authors.lastname: Svanborg
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002858:Chromium Alloys; D003035:Cobalt; D003442:Crowns; D003735:Dental Casting Technique; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015993:Life Tables; D008297:Male; D016876:Metal Ceramic Alloys; D008875:Middle Aged; D011331:Private Practice; D012189:Retrospective Studies
chemical_list: D002858:Chromium Alloys; D016876:Metal Ceramic Alloys; D003035:Cobalt