title: Luting cement-metal surface physicochemical interactions on film thickness.
abstract: Low film thickness is critical to the clinical success of cemented castings. This study investigated the effect of luting agent-metal physico-chemical surface interactions on film thicknesses of representative luting agents. Control group luting agents were placed between two glass plates, as described by American Dental Association specifications 8, 61, and 66, and test group luting agents were positioned between glass and metal plates. The materials selected were zinc phosphate cement, polycarboxylate cement, glass ionomer cement, glass ionomer-composite resin hybrid cement and a resinous cement, with a type III gold alloy, a noble metal ceramic alloy, and a base metal ceramic alloy. A two-way analysis of variance and follow-up tests were done. The effects of the type of metal surface, type of cement, and their statistical interaction significantly affected film thickness (p < 0.0001). The type of cement had a greater affect on film thickness than the type of metal. A glass ionomer cement produced lower overall film thicknesses than other cement types, and a noble metal ceramic alloy created lower overall film thicknesses than other types of metal. American Dental Association specifications for cement film thickness did not accurately reflect normal cement use.
authors.affiliation: Department of Restorative Dentistry, Loma Linda University, School of Dentistry.
authors.forename: J M
authors.initials: JM
authors.lastname: Strutz
authors.forename: S N
authors.initials: SN
authors.lastname: White
authors.forename: Z
authors.initials: Z
authors.lastname: Yu
authors.forename: C L
authors.initials: CL
authors.lastname: Kane
mesh_terms: D000571:American Dental Association; D000704:Analysis of Variance; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D008277:Magnesium Oxide; D008422:Materials Testing; D010710:Phosphates; D011076:Polycarboxylate Cement; D012015:Reference Standards; D015203:Reproducibility of Results; D019279:Resin Cements; D013499:Surface Properties; D014481:United States; D014783:Viscosity; D015034:Zinc Oxide; D015036:Zinc Phosphate Cement
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; D003738:Dental Cements; C061504:Flecks; D010710:Phosphates; D011076:Polycarboxylate Cement; D019279:Resin Cements; D008277:Magnesium Oxide; D015036:Zinc Phosphate Cement; C040235:Ketac-cem; C049160:Den-Mat; C052304:Panavia EX; C041940:Duralon; D015034:Zinc Oxide