title: Failure at the margin of amalgams as affected by cavity width, tooth position, and alloy selection.
abstract: The effects of alloy, cavity width, and tooth position on failure rate at the margins of 429 two-year-old Class II amalgams were analyzed. Interpretation of the results from a factorial design indicated that: (1) There were significant differences among alloys; (2) conservative preparations exhibit less breakdown than wider preparations; and (3) there was less failure in lower premolars than in other posterior teeth.
mesh_terms: D003722:Dental Alloys; D003723:Dental Amalgam; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D006801:Humans; D013499:Surface Properties; D014070:Tooth / Q000033:anatomy & histology*
chemical_list: D003722:Dental Alloys; D003723:Dental Amalgam