Effect of Multiple Consecutive Adhesive Coatings on Microleakage of Class V Cavities

Abstract

Objectives: The purpose of this in vitro study was to evaluate the effect of multiple consecutive adhesive coatings of a one-step self-etch adhesive on microleakage of Class V cavities.Methods: Standardized box shaped Class V cavities were prepared onto the buccal side of forty five non-carious human premolar teeth. The teeth were randomly divided into three groups of fifteen teeth in each and restored as: Group I- one-step self-etch adhesive resin (Clearfil S3, Kuraray Co. Ltd., Osaka, Japan) was applied according to the manufacturer�s instructions, Group II- two consecutive same one-step self-etch adhesive application was performed, and Group III- three consecutive same one-step self-etch adhesive application was performed. After the adhesive applications light curing unit was activated for 20 seconds and the cavities were restored with a composite resin. The restorations were finished with aluminum oxide discs and the specimens were stored in water at room temperature for 24 hours before they were immersed in 2% methylene blue for 48 hours. The dye penetration was examined under a stereomicroscope and the asymtotic significance were analysed with Kruskall Wallis and Mann Whitney U tests and dentin-enamel margins were compared with each other with Wilcoxon Signed Rank test.Results: The microleakage at the dentinal margins of Class V cavities were significantly decreased with two (Group II) and three (Group III) consecutive adhesive applications (P<.05). There was no significant difference between Group I, Group II and Group III at the enamel margins (P<.05). The microleakage at the dentinal margins were significantly higher than the enamel margins in Group I and Group II but in Group III there was no statistically significant difference (P<.05).Conclusions: Within the limitations of this in vitro study, it may be concluded that three consecutive applications of the one-step self-etch adhesive resin provided better sealing than the one coat of adhesive resin at the dentinal margins of Class V cavities. (Eur J Dent 2009;3:178-184)

The effects of dental adhesives total etch; self-etch and selective etch application procedures on microleakage in class II composite restorations

“…One of these methods is thermal cycling. In dental restoration studies that use thermal cycling, temperatures between 5-55°C are preferred, and a variation of ±5°C is considered normal ( 17 ). The holding times in cold and hot water tanks during the thermal cycling procedure can vary between 10, 15, 30, 60, and 120 seconds ( 18 ).…”

Influence of Surface Sealants on Microleakage in Composite Restorations

“…They were rinsed thoroughly under tap water, and ground to the medial plane in a buccal-palatal orientation on rotating silicon-carbide discs of decreasing abrasiveness, for observation under a stereoscopic loupe with 40 to 50 X magnification. The degree of leakage was evaluated by two calibrated researchers, and scored according to the penetration of the dye into the tooth-restoration interface using a 0 to 3 grading scale (Arisu et al, 2009), Grade 0: no dye penetration; Grade 1: mild; limited penetration into the cavosurface margin; Grade 2: moderate; penetration of the dye into the enamel; and Grade 3: extensive; dye penetration reaching the enamel-dentin junction (Table II).…”

Evaluation of Stain Penetration by Beverages in Demineralized Enamel Treated With Resin Infiltration

“…10,11 Factors that can contribute to microleakage include polymerization shrinkage of restorations, different linear coefficients of thermal expansion from the tooth, water absorption, mechanical loading, and manipulation of materials by operators. 12,13 In vitro studies have shown that microleakage may cause marginal discoloration, hypersensitivity, recurrent caries, adverse pulpal response, and accelerated deterioration of some restorative materials. 11 This property has been used by many clinicians and researchers to predict the performance of a restorative material.…”