19 March 2015 Effect of thermal shock loadings on stability of dentin-composite polymer material adhesive interfaces
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Abstract
In the past several decades the problem of longevity and durability of adhesive interfaces between hard tooth tissues and composite resin-based materials are of great interest among dental researchers and clinicians. These parameters are partially determined by adhesive system mechanical properties. In the present research project nanoindentation has been examined to test hardness of dental adhesive systems. A series of laboratory experiments was performed to study the effect of light curing time and oxygen inhibition phenomenon on light-cured adhesive material hardness. An adhesive system AdperTM Single Bond (3M ESPE) was selected as a material for testing. The analysis of experimental data revealed that the maximum values of hardness were observed after the material had been light-cured for 20 seconds, as outlined in guidelines for polymerization time of the adhesive system. The experimental studies of oxygen inhibition influence on adhesive system hardness pointed out to the fact that the dispersive layer removal led to increase in adhesive system hardness. A long – time exposure of polymerized material of adhesive system at open air at room temperature resulted in no changes in its hardness, which was likely to be determined by the mutual effect of rival processes of air oxygen inhibition and directed light curing.
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Nadezda O. Bessudnova, Nadezda O. Bessudnova, Olga A. Shlyapnikova, Olga A. Shlyapnikova, Sergey B. Venig, Sergey B. Venig, Andrey N. Gribov, Andrey N. Gribov, } "Effect of thermal shock loadings on stability of dentin-composite polymer material adhesive interfaces", Proc. SPIE 9448, Saratov Fall Meeting 2014: Optical Technologies in Biophysics and Medicine XVI; Laser Physics and Photonics XVI; and Computational Biophysics, 94480W (19 March 2015); doi: 10.1117/12.2179994; https://doi.org/10.1117/12.2179994
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