Longevity of bonds made by composite and polyacid-modified resins to dentin using a dual-cured adhesive system

Raquel Osorio, Manuel Toledano, Estrella Osorio, Franklin R. Tay

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Purpose: To evaluate the microtensile bond strengths (MTBS) of a dual-cured dentin adhesive bonded to dentin using a light-cured resin-based composite (composite) or a polyacid-modified resin-based composite (compomer), and to investigate the effect of water aging on the bond strengths of these systems. Methods: Flat dentin surfaces prepared from extracted human third molars were bonded with Prime&Bond NT Dual-Cured version (PBNT). Resin build-up crowns were constructed incrementally with two different materials: a composite (Z250) or a compomer (Dyract AP). When Dyract AP was used as the restorative material, half of the specimens were etched with 36% phosphoric acid, and the other half of the specimens were not etched. After storage in water for 24 hours or for 6 months, the teeth were sectioned to obtain bonded 1.3 mm2 beams containing the bonded interface. Each beam was tested in tension in an Instron machine at 0.5 mm/minute. Results were analyzed by multiple ANOVA and Student-Newman-Keuls multiple comparison tests. Results: The group PBNT/Dyract AP bonded to acid-etched dentin showed the highest bond strength, in the 24-hour evaluation. Bond strength values decreased significantly after aging. The groups treated with PBNT in light-cured, dual-cured and self-cured modes performed equally well in the 24-hour evaluation. After 6 months of water aging, bond-strengths of the light-cured groups remained stable. By contrast, decreases in the bond strengths of the self-cured groups were observed.

Original languageEnglish (US)
Pages (from-to)19-22
Number of pages4
JournalAmerican journal of dentistry
Volume18
Issue number1
StatePublished - Jan 1 2005
Externally publishedYes

ASJC Scopus subject areas

  • Dentistry(all)

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