title: A shear stress analysis of the bonding of porcelain veneers to enamel.
abstract: This study demonstrated the relative strengths of the composite resin bond to etched enamel and the composite resin bond to surface-treated porcelain with similar conditions. It also compared the strength of a combined porcelain/composite/enamel bond with the strengths of porcelain/composite resin and enamel/composite resin bonds and evaluated the effectiveness of silane treatment of the etched porcelain. The influence of thermocycling was also investigated. There were 20 samples for each five categories: (1) composite resin/etched porcelain; (2) composite resin/etched and silane-treated porcelain; (3) composite resin/acid-etched enamel; (4) etched porcelain/composite resin/acid-etched enamel; and (5) etched and silane-treated porcelain/composite resin/acid-etched enamel. Half in each category were subjected to thermocycling. Shear testing and microscopic examination of the fracture sites resulted in the following: (1) Shear testing a combined enamel/composite/porcelain bond resulted in significantly different values from testing individual enamel/composite resin and porcelain/composite resin bond strengths. (2) Silane treatment of the etched porcelain recorded a significantly greater shear strength to the merely etched samples. (3) Thermocycling did not significantly dilute the effects of silane treatment of the etched porcelain surface.
authors.affiliation: Royal Australian Army Dental Corps, Sydney.
authors.forename: G D
authors.initials: GD
authors.lastname: Stacey
mesh_terms: D000134:Acid Etching, Dental; D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003743:Dental Enamel; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis; D003801:Dental Veneers; D006358:Hot Temperature; D006801:Humans; D008422:Materials Testing; D012821:Silanes; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D012821:Silanes; D003776:Dental Porcelain