“…8 However, clinicians have reported bonding failures when self-cured composite core materials were bonded with 1-bottle light-cured adhesive systems. 2,9 The decrease in bond strength of self-cured composites to dentin was inversely proportional to the acidity of these 1-bottle systems. 10 Adverse chemical interactions between unpolymerized acidic adhesive resin monomers and a basic tertiary amine catalyst in the composite was thought to be responsible for the observed incompatibility.…”
Section: Clinical Relevancementioning
confidence: 97%
“…depending on the polymerization mode (chemical, light or dual activation). [2][3][4] Self-cured composites are currently used in dentistry, primarily as core buildup materials, and their suitability as core materials has been demonstrated. [5][6][7] Factors, such as time and simplicity of the clinical steps, have led to an increased use of light-cured 1-bottle adhesives in association with resin composite core materials.…”
Section: Clinical Relevancementioning
confidence: 99%
“…2 To circumvent this problem, 2 ml of each adhesive was collected and dispensed into a clean glass vial containing 3 ml of 70% ethanol and 30% water, which was diluted from absolute ethanol (ACS analytical grade, Merck Sharp & Dohme, Germany). The mixture was stirred continuously for 5 minutes, and the pH value of the adhesive solution was measured at ambient temperature (20-25°C) using a digital pH meter (Methrom, Model 744, Sweden).…”
Section: Ph Measurement Of 1-bottle Adhesivesmentioning
confidence: 99%
“…These adhesive systems have a low and varied pH. 2 The adhesive layer that is in direct contact with oxygen will not be completely photocured. This layer contains acidic monomers that are in direct contact with the subsequently applied composite.…”
SUMMARYThis in vitro study examined the effect of 1-bottle light-cured adhesives with different acidities on the microleakage of a self-cured composite in Class II restorations. Forty-five Class II cavities were prepared on the proximal surfaces of extracted human intact third molars that were randomly assigned to 3 groups (15 cavities in each group). The following adhesives were applied according to the manufacturer's instructions: Single Bond (Group 1), Excite (Group 2) and One-Step (Group 3). The teeth were restored with a combination of a self-cured resin composite (Concise) and a light-cured resin composite (Filtek P60). After thermocycling (500 cycles at 5°C/55°C) and immersion in 2% basic Fushin, the teeth were sectioned and evaluated for microleakage using a stereomicroscope (16x). Microleakage was scored on a scale of 0 to 3. Kruskal-Wallis analysis showed that there was a significant difference in microleakage values of 3 adhesives with a self-cured composite, and low pH may have contributed to high microleakage values. Also, 2 by 2 comparisons with the MannWhitney U-test revealed a significant difference at the p<0.05 level between Groups 1 and 2 and between Groups 2 and 3. However, there was no statistically significant difference between Groups 1 and 3.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.