Adverse surface interactions between one-bottle light-cured adhesives and chemical-cured composites

“…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.…”

Section: Introductionmentioning

confidence: 99%

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Effect of 1-bottle Light-cured Adhesive Acidity on Microleakage of a Self-cured Composite

Kimyai¹,

Oskoee²

2006

Operative Dentistry

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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.

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Properties of particulate resin‐luting agents with phosphate and carboxylic functional methacrylates as coupling agents

Habekost¹,

Camacho²,

Lima³

et al. 2012

J of Applied Polymer Sci

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This study investigated properties of resin‐luting agents using silane [3‐(trimethoxysilyl)propyl methacrylate (TSPM)], phosphoric acid methacrylate (PAM) [mono/bis(methacryloyloxyethyl (di)hydrogen phosphate)], or carboxylic acid methacrylate (CAM) [mono‐2‐(methacryloyloxy)ethyl maleate] as coupling agents between the inorganic and organic phases. Ba‐B‐Al‐Si microparticles (3 μm) and SiO2 nanoparticles (7 nm) were coated with TSPM, PAM, or CAM (control = no filler coating). A Bis‐GMA/triethyleneglycol dimethacrylate comonomer was loaded with 60% mass of inorganic fillers. The properties evaluated were degree of CC conversion (DC), flexural strength (σ), and modulus (Ef), Knoop hardness number (KHN), and film thickness (FT). Dispersion/interaction of the particles with the resin phase was assessed by scanning electron microscopy (SEM). No significant differences in DC were observed. For σ and Ef, TSPM > CAM > Control > PAM. For KHN, TSPM > CAM > PAM = Control. For FT, TSPM < Control < CAM < PAM. The SEM analysis revealed clustering of nanoparticles for all groups and better organic–inorganic phases interaction for TSPM and CAM. The use of TSPM generated agents with improved properties as compared with the acidic methacrylates, with CAM showing better performance than PAM. The use of PAM generated agents with properties usually poorer compared with the material with no coupling agent. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Adverse surface interactions between one-bottle light-cured adhesives and chemical-cured composites

Cited by 259 publications

References 31 publications

Shear bond strength of resin cements to human dentin

Shear bond strength of resin cements to human dentin

Effect of 1-bottle Light-cured Adhesive Acidity on Microleakage of a Self-cured Composite

Properties of particulate resin‐luting agents with phosphate and carboxylic functional methacrylates as coupling agents

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