title: Influence of adhesive polymerization mode on dentin bond strength of direct core foundation systems.
abstract: This study examined the influence of various adhesive systems on dentin bond strength of direct core foundation resins. Two commercially available direct core foundation resin systems and 2 adhesive polymerization modes were used. Facial bovine dentin surfaces were wet ground on 600-grit SiC paper. Dentin surfaces were treated according to the manufacturers' instructions and were light polymerized (control). Chemical- and light-polymerized adhesive systems were used separately. The resin paste was condensed into a mold and bonded to the dentin surface. Ten specimens per test group were stored in water at 37 degrees C for 24 hours, and a shear test was conducted at a crosshead speed of 1.0 mm/minute using a universal testing machine. Analysis of variance (ANOVA) and Duncan's multiple comparison test were performed (alpha = 0.05). Dual polymerization of resin pastes revealed higher bond strength with the combination of light-polymerized adhesive (22.8-24.3 MPa), but significantly lower bond strength with the combination of a chemical-polymerized adhesive (4.2-5.7 MPa). The present data suggests that dentin bond strengths in direct core foundation systems can be influenced by the combination of adhesive and resin paste.
authors.affiliation: Nihon University Graduate School of Dentistry, Tokyo, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Oooka
authors.forename: Masashi
authors.initials: M
authors.lastname: Miyazaki
authors.forename: Toshiki
authors.initials: T
authors.lastname: Takamizawa
authors.forename: Keishi
authors.initials: K
authors.lastname: Tsubota
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Kurokawa
authors.forename: Akitomo
authors.initials: A
authors.lastname: Rikuta
mesh_terms: D000818:Animals; D002417:Cattle; D001840:Dental Bonding / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods
chemical_list: D017220:Dentin-Bonding Agents