Abstract:
:Adhesives cured under constrained conditions develop contraction stresses. We hypothesized that, with dentin as a bonding substrate, the stress would reach a maximum, followed by a continuous decline. Stress development was determined with a tensilometer for two total-etch systems and two systems with self-etching primers. The adhesives were placed in a thin layer between a glass plate and a flat dentin surface pretreated with phosphoric acid or self-etching primer. After an initial maximum shortly after light-curing, the stress decreased dramatically for the total-etch systems (70%) and, to a lesser extent, for the adhesives with self-etching primers (30%). The greater stress decrease for the total-etch systems was ascribed to water and/or solvents released into the adhesives from the fully opened dentinal tubules by the pulling/sucking action of the contraction stress. This happened less with the adhesives with self-etching primers, where the tubules remained mainly closed.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Hashimoto M,de Gee AJ,Kaga M,Feilzer AJdoi
10.1177/154405910608500808subject
Has Abstractpub_date
2006-08-01 00:00:00pages
728-32issue
8eissn
0022-0345issn
1544-0591pii
85/8/728journal_volume
85pub_type
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