Comparative Study of Microleakage of Nanocomposite Resin Restoration Using Filled and Unfilled Adhesives
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Date
2010-06-03
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Chiang Mai Dental Journal
Abstract
The purpose of this study was to evaluate the microleakage of nanofilled resin composite restorations when three adhesives that are filled adhesives : Adper® Single Bond 2 and OptiBond® Solo Plus and unfilled adhesive : Adper® Single Bond of Two-step Total-etch System were used. Sixty Class V cavities (3 mm. width, 4 mm. length and 2 mm. depth) were prepared on buccal surface of extracted human molars. Occlusal margins were located in enamel whereas gingival margins were located in dentin or cementum. Prepared cavities were divided into 3 groups of 20 cavities and restored with a nanofilled resin composite Filtex® Z 350 with one unfilled adhesive (Adper® Single Bond) and two filled adhesives (Adper® Single Bond 2 and OptiBond® Solo Plus). The adhesives were used according to the manufacturers’ instructions. The teeth were stored in distilled water for 24 hours before subjected to thermocycling between 5-55°c for 500 cycles with dwell time of 20 seconds and then immersed in 2% methylene blue dye for 4 hours. Each tooth was longitudinally sectioned in bucco-lingual direction. The sectioned specimens were examined under Stereomicroscope at 35X magnification and recorded with Digital camera. The distance of dye penetration were measured using Image J program. The data were analyzed by One-way ANOVA test (p
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Chiang Mai Dental Journal; Vol.30 No.1 2009; 61-70