title: Effect of Selective Etch on the Bond Strength of Composite to Enamel Using a Silorane Adhesive.
abstract: An improvement in bond strength to enamel has been demonstrated with the use of phosphoric acid prior to bonding with self-etch methacrylate-based adhesive agents. No research has evaluated the effect of phosphoric-acid etching of enamel with a newer self-etch silorane adhesive. The purpose of this study was to evaluate the shear-bond strength of composite to enamel using the self-etch silorane adhesive compared to other self-etching methacrylate-based adhesives, with or without a separate application of phosphoric acid. Bovine incisors were sectioned using a diamond saw and mounted in plastic pipe. The bonding agents were applied to flattened enamel surfaces with or without the application of 35% phosphoric acid. The bonded tooth specimens were inserted beneath a mold, and composite was placed incrementally and light cured. The specimens were stored for 24 hours and six months in water and tested in shear. Data were analyzed with a three-way analysis of variance (ANOVA) to evaluate the effects of surface treatment, adhesive agent, or time on the bond strength of composite to bovine enamel (α=0.05). Significant differences were found between the groups based on surface treatment (p<0.01) or adhesive agent (p<0.01), but not on time (p=0.19), with no significant interactions (p>0.14). Phosphoric-acid etching of bovine enamel significantly increased the bond strength of the self-etch methacrylate and the silorane adhesives. The methacrylate-based adhesives had significantly greater bond strength to enamel than the silorane adhesive.
authors.forename: L
authors.initials: L
authors.lastname: Bermudez
authors.forename: M
authors.initials: M
authors.lastname: Wajdowicz
authors.forename: D
authors.initials: D
authors.lastname: Ashcraft-Olmscheid
authors.forename: K
authors.initials: K
authors.lastname: Vandewalle
mesh_terms: D000134:Acid Etching, Dental; D000818:Animals; D002417:Cattle; D001840:Dental Bonding; D003743:Dental Enamel; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D010756:Phosphoric Acids / Q000008:administration & dosage; D033081:Shear Strength; D062047:Silorane Resins
chemical_list: D017220:Dentin-Bonding Agents; D008689:Methacrylates; D010756:Phosphoric Acids; D062047:Silorane Resins; C030242:phosphoric acid