| 1649 Adhesion of Composite to CAD/CAM Composite Block Material | ||
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R.P. RUSIN, and Y. LAPITSKY, 3M ESPE Dental Products, St. Paul, MN, USA Ceramic-filled stains and composites are frequently applied to CAD/CAM milled restorations to adjust anatomy and enhance aesthetics. Objectives: measure the shear adhesion of composites to a CAD/CAM composite block material, 3M™ ESPE™ Paradigm™ MZ100 Block for CEREC®. Methods: The shear adhesion was measured for 3M™ ESPE™ Sinfony™ Composite (shades E6; DA2) and 3M™ ESPE™ Z100 Restorative. The bonding surface of the blocks were roughened with 320 grit sandpaper; primed with silane (3M™ ESPE™ RelyX™ Ceramic Primer); coated twice with 3M™ ESPE™ Single Bond Adhesive; light-cured 10 sec. The composites were cured onto the treated blocks in cylindrical molds. In addition, groups of Z100 Restorative bonded to Paradigm MZ100 blocks were prepared with the following comparative treatments after roughening: no treatment; silane only; and Single Bond (SB) only. The data were analyzed via one-way ANOVA and compared with Fisher's pairwise comparisons (p<0.05) Results: The shear adhesion (MPa) was: Group A (E6) 21.6±4.6; Group B (DA2) 22.5±5.4; Group C (Z100) 29.3±3.1; Group D (Z100, no treatment) 22.8±1.6; Group E (Z100, silane only) 25.9±4.3; Group F (Z100, SB only) 22.7±1.9). Conclusions: Group C was statistically higher than Groups A, B, D , and F; Group C was statistically similar to Group E. The failure was cohesive through the block material for groups A, B, C, E, F; the failure was adhesive in group D (Z100, no treatment). rprusin@mmm.com | ||
| Seq #207 - Ceramics: Surface Treatment, Surface Chemistry, and Bonding 11:00 AM-12:15 PM, Saturday, 15 March 2003 Henry B. Gonzalez Convention Center Exhibit Hall C | ||
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