title: 12-year survival of composite vs. amalgam restorations.
abstract: Information about the long-term clinical survival of large amalgam and composite restorations is still lacking. This retrospective study compares the longevity of three- and four-/five-surface amalgam and composite restorations relative to patients' caries risk. Patient records from a general practice were used for data collection. We evaluated 1949 large class II restorations (1202 amalgam/747 composite). Dates of placement, replacement, and failure were recorded, and caries risk of patients was assessed. Survival was calculated from Kaplan-Meier statistics. After 12 years, 293 amalgam and 114 composite restorations had failed. Large composite restorations showed a higher survival in the combined population and in the low-risk group. For three-surface restorations in high-risk patients, amalgam showed better survival.
authors.affiliation: College of Dental Science, Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, PO Box 9101, NL 6500 HB Nijmegen, The Netherlands. n.opdam@dent.umcn.nl
authors.forename: N J M
authors.initials: NJ
authors.lastname: Opdam
authors.forename: E M
authors.initials: EM
authors.lastname: Bronkhorst
authors.forename: B A C
authors.initials: BA
authors.lastname: Loomans
authors.forename: M C D N J M
authors.initials: MC
authors.lastname: Huysmans
mesh_terms: D000328:Adult; D000368:Aged; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003387:Cracked Tooth Syndrome / Q000209:etiology; D003722:Dental Alloys / Q000737:chemistry; D003723:Dental Amalgam / Q000737:chemistry*; D003731:Dental Caries / Q000628:therapy; D003764:Dental Materials / Q000737:chemistry*; D017269:Dental Prosthesis Repair; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000145:classification / Q000592:standards*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008875:Middle Aged; D012189:Retrospective Studies; D018570:Risk Assessment; D016019:Survival Analysis; D014082:Tooth Fractures / Q000209:etiology; D055815:Young Adult
chemical_list: C112828:Clearfil AP-X; D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D008689:Methacrylates; C481355:Photobond; C092420:Clearfil Photo Posterior; C033470:Dispersalloy; D017438:Bisphenol A-Glycidyl Methacrylate; D003723:Dental Amalgam