Evaluation of Dental Adhesion and Durability by Means of the Microbond Test

Published

February 25, 1998

Author(s)

Joseph M. Antonucci, Walter G. McDonough, Joy P. Dunkers

Abstract

The phenomenon of interfacial of interphase adhesion is a critical factor in determining the strength and durability of multiphase dental materials. For example, the clinical performance of acrylic polymer based dental composites depends to a large extent on the quality of the filler/resin interface. The microbond test [MBT], a single fiber shear test, has the potential to reduce the complexity of events that confound interfacial failure analysis by presenting a simple test geometry. In this study, the feasibility of using MBT as a durability test to probe the interaction of a dental resin with differently silanized E-glass fibers after exposure to aqueous media was investigated. The E-glass fibers were silanized with equivalent amounts of two types of silane coupling agents, 3-methacryloxypropyltrimethoxysilane [MPTMS] and the more hydrophobic 10-methacryloxydecyltrimethoxysilane [MDTMS]; unsilanized E-glass was used as the control. One set of fibers was conditioned in air after 24 h at 23 degrees {Celsius}, while another set was conditioned for 24 h in distilled water at 60 degrees {Celsius}. Microdroplets of the photoactivated resin were applied on the fiber and photocured with a visible light [470 nm] for three minutes. Subsequently, the specimens were tested in shear. The mean interfacial shear strength, τ, standard deviation] in Mpa for the three systems [n > 7] conditioned in air were: 15.3 [4.2] for the unsilanized fiber, 33.0 [10.2] for the MPTMS silanized fiber, and 37.6 [6.8] for the MDTMS silanized fiber. Analysis of variance [ANOVA] indicated no significant differences existed between the τ values of the two silanized fiber resin systems, but significant differences were found with both silanized systems and the control [p 7] conditioned in distilled water at 60 degrees {Celsius} were: 17.5 [4.9] for the unsilanized fiber, 15.8 [4.8] for the MPTMS silanized fiber, and 31.8 [7.7] for the MDTMS silanized fiber. ANOVA indicated significant differences existed between the τ values of the MDTMS silanized fiber-resin system and that of the MPTMS silanized fiber-resin system and the control [P

Proceedings Title

21st Annual Meeting of tghe Adhesion Society

Conference Dates

February 22-25, 1998

Conference Title

Adhesion Society

Pub Type

Conferences

Keywords

dental adhesion, dental resin, dentin, durability, FT-IR spectroscopy, microbond test

Citation

Antonucci, J. , McDonough, W. and Dunkers, J. (1998), Evaluation of Dental Adhesion and Durability by Means of the Microbond Test, 21st Annual Meeting of tghe Adhesion Society (Accessed October 31, 2024)