Sealing effectiveness of fissure sealant bonded with universal adhesive systems on saliva-contaminated and noncontaminated enamel

Abstract

BackgroundThe effectiveness of sealants is dependent upon their adhesion to enamel surface. The aim of the study was to evaluate the sealing ability of a pit and fissure sealant used with a universal adhesive (etch-and-rinse vs. self-etch modes) when the site is contaminated with saliva. Adhesive properties were evaluated as microleakage and scanning electron microscopic (SEM) characteristics.Material and MethodsA total of 72 mandibular third molars were randomly divided into 6 groups (n=12). Occlusal pits and fissures were sealed with an unfilled resin fissure sealant (FS) material with or without saliva contamination. The groups included: 1) phosphoric acid etching + FS (control), 2) phosphoric acid etching + Scotchbond Universal (etch-and-rinse) + FS, 3) phosphoric acid etching + saliva + Scotchbond Universal (etch-and-rinse) + FS, 4) Scotchbond Universal (self-etching) + FS,5) Scotchbond Universal (self-etching) + saliva + FS, and 6) Scotchbond Universal (self-etching) + saliva + Scotchbond Universal + FS. After thermocycling, the teeth were placed in 0.5% fuchsin, sectioned, and evaluated by digital microscopy. Two samples from each group were also observed by SEM. The data were analyzed with Kruskal-Wallis and Mann-Whitney tests for a significance of p<0.05.ResultsThere were significant differences among groups. Groups 1,2 and 4 showed the least microleakage, with no significant differences among groups. Saliva contamination led to increased microleakage and gap formation in SEM images in groups 3, 5 and 6.ConclusionsThe fissure sealing ability of the universal adhesive in etch-and-rinse or self-etch modes was similar to that of conventional acid etching. Saliva contamination had a negative effect on sealant adhesion to pretreated enamel. Key words:Pit and fissure sealant, Universal adhesive, Saliva.

The efficacy of dental sealant used with bonding agent on occlusal caries (ICDAS 2‐4): A 24‐month randomized clinical trial

“…21 Thus, it is possible that applying a bonding agent prior to a sealant on carious surfaces enhanced the retention rate, which occurred on saliva-contaminated surfaces. [12][13][14][15] This is because the volatility of the ethanol-based bonding agent provides deep flow into the micro-spaces of the etched enamel and effectively displaces the trapped water in the moist enamel. 17,22 In this study, none of the participants in the complete retention group had changes in their ICDAS score.…”

Evaluation of Microleakage in Fissure Sealants following Contamination with Artificial Saliva at Different Curing Times with or without using bonding agent

“…Nevertheless, when saliva was introduced during the application of the material, microleakage significantly increased, and 1-second air-thinning of the saliva, 10-second air-drying of the saliva, or reconditioning before sealant application did not significantly decrease the microleakage. Memarpour et al [16] also have evaluated the effect of saliva contamination on sealing properties of fissure sealant bonded with universal adhesive systems. They revealed that saliva contamination after etching the tooth had an adverse effect on the adhesion of the sealant to the treated enamel.…”

“…The increase of microleakage after saliva contamination, which observed in these two studies, is similar to the results of the present study. However, the effect of the time of contamination during light curing was not considered in the Peng et al 15 and Memarpour et al [16] studies. Basir et al [17] carried out a study on the effect of the different adhesive system on fissure sealant microleakage with or without saliva contamination.…”

The Effect of Enamel Pretreatment With Nanosilver Fluoride on Pit and Fissure Sealant in Permanent Teeth (In-Vitro Study)

“…The universal bond was used as its monomers composition differs from other adhesive systems. The selfetching option allows good chemical and micromechanical bonding to the enamel surface and it can alternate the conventional etching (31,32). Moreover, Universal adhesives are simpler, more user-friendly, and less technique-sensitive, and reduce patient chair time.…”

“…Moreover, Universal adhesives are simpler, more user-friendly, and less technique-sensitive, and reduce patient chair time. These privileges are advantageous in pediatric dentistry (32).…”