title: Influence of saliva contamination and abrasion on resin to tin-plated alloy bond strengths.
abstract: This investigation studied the effects of abrasion and salivary contamination on the shear bond strength of a composite resin bonded to tin-plated gold alloy. Experimental groups (n = 15) consisted of: group 1, no surface treatment; group 2, enamel abraded; and group 3, saliva-contaminated. After surface stressing and bonding, groups were thermocycled before shear testing. Fractured interfaces were analyzed by use of light microscopy and SEM. Specimens in group 3 (12.2 +/- 2.5 MPa) had significantly lower bond strengths than group 1 (17.9 +/- 6.8 MPa). The shear bond strengths of resin bonded to tin-plated metal were significantly affected by salivary contamination but not by abrasion.
authors.affiliation: Naval Dental School, Bethesda, Md., USA.
authors.forename: T A
authors.initials: TA
authors.lastname: Sneesby
authors.forename: J C
authors.initials: JC
authors.lastname: Meiers
mesh_terms: D000134:Acid Etching, Dental; D002484:Cementation; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003743:Dental Enamel; D004868:Equipment Failure; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012463:Saliva / Q000502:physiology*; D013314:Stress, Mechanical; D013499:Surface Properties; D013816:Thermodynamics; D014001:Tin / Q000737:chemistry*
chemical_list: D003188:Composite Resins; D006047:Gold Alloys; D014001:Tin