Influence of caries infiltrant contamination on shear bond strength of different adhesives to dentin

Abstract

OBJECTIVES: To analyze whether the contamination with a caries infiltrant system impairs the adhesive performance of etch-and-rinse and self-etching adhesives on dentin. MATERIALS AND METHODS: Dentin contamination with the caries infiltrant system (Icon, DMG) was simulated by applying either hydrochloric acid (15 % HCl, Icon Etch, 15 s), the resin infiltrant (Icon infiltrant, 4 min), or both prior to the application of the respective adhesives (each group n = 10). In the control groups, the etch-and-rinse adhesive (Optibond FL, Kerr) and the self-etching adhesive (iBOND Self Etch, Hereaus) were applied without former contamination with the infiltrant system. Additionally, the adhesive performance of the resin infiltrant alone was tested. Shear bond strength of a nano-hybrid composite was analyzed after thermocycling (5,000×, 5-55°C) of the specimens and analyzed by ANOVA/Scheffé post hoc tests (p < 0.05) and Weibull statistics. Failure mode was inspected under a stereomicroscope at × 25 magnification. RESULTS: Contamination with the resin infiltrant alone did not impair shear bond strength, while contamination with hydrochloric acid or with hydrochloric acid and the resin infiltrant reduced shear bond strength (MPa) of the adhesives (Optibond FL: 20.5 ± 3.6, iBOND Self Etch: 17.9 ± 2.6) significantly. Hydrochloric acid contamination increased the number of adhesive failures. The adhesive performance of the caries infiltrant system alone was insufficient. CONCLUSION: The contamination with the caries infiltrant system impaired the shear bond strength of conventional dental adhesives. CLINICAL RELEVANCE: Contamination of the caries infiltrant system on dentin should be avoided due to the detrimental effect of hydrochloric acid etching. Clinical relevance: Contamination of the caries infiltrant system on dentin should be avoided due to the detrimental effect of hydrochloric acid etching.3

Infiltration of White-Spot-Lesions and developmental enamel defects

“…The surfaces of infiltrated lesions are described as protected enamel surfaces following appropriate polishing, in vitro (20,21) . These finding is underlined by the description of an increase of mechanical strength after resin infiltration by other authors (22)(23)(24) . Infiltrated lesions seem to be protected against new acid induced demineralization, and based on different in vitro experiments, a combination of resin infiltration and several adhesive systems seems to be viable, thereby allowing for a proceeding with fixed orthodontic treatment following an infiltration intervention (22,25,26) .…”

“…These finding is underlined by the description of an increase of mechanical strength after resin infiltration by other authors (22)(23)(24) . Infiltrated lesions seem to be protected against new acid induced demineralization, and based on different in vitro experiments, a combination of resin infiltration and several adhesive systems seems to be viable, thereby allowing for a proceeding with fixed orthodontic treatment following an infiltration intervention (22,25,26) . Even more, there seems to be an enhanced performance of adhesives compared to untreated demineralized enamel: Some research groups quantified the bond strength of orthodontic brackets to infiltrated enamel (16,(27)(28)(29)(30) and found that a mechanical inforcement of infiltrated surfaces seems to reduce enamel cracks or surface damages after debonding, in vitro (29) .…”

Effects of Different Demineralization‐Inhibiting Methods on the Shear Bond Strength of Glass‐Ceramics

“…Several researchers have also investigated the effects of fluoride, CPP‐ACP, microabrasion, and resin infiltration for prophylactic purposes on the SBS of orthodontic brackets . Furthermore, Jia et al investigated the effect of resin infiltration on the SBS of different adhesive systems applied to sound and demineralized enamel.…”

Aplicação dos sistemas adesivos nos últimos cinco anos

“…Jia et al 19 analisaram a influência da contaminação de recidiva de cárie na resistência adesiva de diferentes adesivos na dentina. O estudo foi simulado por meio do sistema Caries Infiltrant System (Icon DMG).…”