title: Five-year treatment outcomes for teeth with large amalgams and crowns.
abstract: For 4735 posterior complex amalgams and crowns placed in adults with continuous dental HMO coverage, all additional treatment received over the subsequent 5 years was determined. The restorations were placed under routine clinical conditions by 74 different dentists among a broad spectrum of insured dental patients. Treatment outcomes were described in terms of a hierarchical classification of additional treatments. At the extremes, a successful outcome was defined as no additional treatment or an additional one- or two-surface restoration on the same tooth, and a catastrophic outcome as extraction or endodontic treatment. Due to clinical protocols, teeth with guarded to poor prognosis prior to treatment are overrepresented in the five-surface amalgam cohort. Successful outcomes characterized 72% of four-surface amalgams, 65% of five-surface amalgams, 84% of gold crowns, and 84% of porcelain crowns. Catastrophic outcomes occurred for 10% of four-surface amalgams, 15% of five-surface amalgams, 8% of gold crowns, and 9% of porcelain crowns.
authors.affiliation: Permanente Dental Associates, Portland, OR 97322-2099, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Martin
authors.forename: J D
authors.initials: JD
authors.lastname: Bader
mesh_terms: D000328:Adult; D001641:Bicuspid; D016009:Chi-Square Distribution; D003442:Crowns; D003723:Dental Amalgam; D003793:Dental Restoration, Permanent / Q000379:methods*; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D008963:Molar; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D003723:Dental Amalgam