title: Zinc-containing high copper amalgams: a 3-year clinical evaluation.
abstract: Dispersalloy with a 0.9% zinc and a non-zinc composition and Tytin with a 1.0%, 0.33% and a non-zinc formula were evaluated. Thirty-nine patients received 247 amalgam restorations, in which these five formulas were randomly placed. Results after 3 years indicate that the zinc-containing alloys had less fracture at the margins than the non-zinc alloys. The data indicate that small amounts of zinc (approximately 1%) play a beneficial role in the serviceability of high copper amalgams.
authors.affiliation: University of Colorado, Denver.
authors.forename: J W
authors.initials: JW
authors.lastname: Osborne
authors.forename: T G
authors.initials: TG
authors.lastname: Berry
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D003300:Copper; D003722:Dental Alloys; D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control*; D003793:Dental Restoration, Permanent; D005260:Female; D006801:Humans; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D015032:Zinc
chemical_list: D003722:Dental Alloys; C033470:Dispersalloy; C036886:tytin; D003300:Copper; D003723:Dental Amalgam; D015032:Zinc