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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Prof. Dr. Roland Frankenberger, Prof. Bart Van Meerbeek

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

November/December 2014
Volume 16 , Issue 6



Pages: 517-522
PMID: 25516882
DOI: 10.3290/j.jad.a33199
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Bond Strength and Monomer Conversion of Indirect Composite Resin Restorations, Part 1: Light vs Heat Polymerization

Malta, Daniel Alexandre Menezes Pedrosa / Magne, Pascal / Monteiro-Junior, Sylvio

Purpose: To assess the resin microtensile bond strength (MTBS) and the monomer conversion (MC) of indirect composite resin restorations made of three different materials.
Materials and Methods: Two light-polymerized direct materials (Filtek Z100 and Premise) and one light- and heat-polymerized indirect material (Premise Indirect) were used. For MTBS testing, 42 cylindrical samples were fabricated (7 pairs per material). Surface conditioning included airborne-particle abrasion, cleaning, and application of a silane. Cylinders were bonded to each other using adhesive resin (Optibond FL). Specimens were stored in water for 24 h. Another 15 cylinders (5 per material) were fabricated for MC measurements (FT-IR) immediately and at 24 h. The MTBS data were submitted to one-way ANOVA and the MC to two-way ANOVA (material and storage time) (α = 0.05), followed by post-hoc comparisons with the Tukey test.
Results: The MTBS to Z100 was 72.2 MPa, significantly higher than that to Premise (48.4 MPa) and Premise Indirect (52.7 MPa). The immediate MC was similar for all materials (range 51% to 56%) and significantly increased at 24 h (range 57% to 66%), except for Z100. Premise Indirect showed the highest MC (66% at 24 h).
Keywords: adhesion, bond strength, direct composite resin, dental materials, indirect composite resin, monomer conversion

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