800 Bond Strength of a Low-shrinkage Composite-resin Using Different Bonding Strategies

Friday, March 23, 2012: 2 p.m. - 3:15 p.m.
Presentation Type: Poster Session
P. SAMIMI, V. MORTAZAVI, V. ALIZADE, and F. KESHANI, Department of Operative Dentistry and Torabinejad Dental Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
Objectives: This invitro study evaluated the micro-shear bond strength of a low-shrinkage composite to dentin using different bonding strategies.

Methods: Seventy extracted premolars were randomly assigned to seven groups (n=10). In groups 1-5 which Silorane composite resin were placed on prepared dentin following application of the adhesives, the bonding strategies were as followes:  Group 1: OptiBond Solo Plus (Opt; kerr), Group 2: SE Bond (SE; kurary), Group 3: silorane System Adhesive(LS primer & bond) (SSA; 3M ESPE), Group 4: OptiBond Solo Plus + LS bond of SSA (Opt LS), Group 5: SE Bond + LS bond of SSA (SE LS). In groups 6&7 as a control, Point 4 composite resin were used after applying  OptiBond Solo Plus (Opt Po) and  SE Bond (SE Po), respectively. After thermal cycling (1000 cycles at 5 and 55° C ), micro-shear bond test was carried out to measure the bond strengths. The results were analyzed using two-way and one-way ANOVA  and Tukey's post-hoc analysis (α = 0.05).

Results: There were no significant differences between two types of composites (P = 0.187), between bonding group (P = 0.06) and between composite and bonding (P = 0.894).  there were significant difference among groups of silorane composites (P = 0.045) and Tukey test showed there were significant difference  between Group 4 and 5. (P = 0.03)

Conclusions: The application of etch & rinse and self-etch methacrylate based adhesives with and without using of a hydrophobic resin coating produces acceptable bond strengths with silorane composite resin.


Keywords: Bond Strength, Composites, Dental materials and Dentin bonding agents
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