الفهرس 
A Comparative Study Evaluating the Microleakage of Colored Compomer versus Conventional Compomer Used in Restoration of Primary Molars (In-Vitro Study)
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Abstract
Microleakage is a major factor affecting the longevity of adhesive restorations. Colored compomer is a new restorative material that was specifically designed for the restoration of primary molars in different colors, but there are limited studies regarding their microleakage. This in-vitro study was conducted to compare the microleakage of a conventional compomer versus different colors of colored compomers placed in primary molars. Fifty-six freshly extracted, non-carious primary molars with intact coronal portion either retained in a crowded arch or about to shed, were collected from the outpatient clinic of the Pediatric Dentistry and Dental Public Health Department, Faculty of Dentistry, Cairo University. The teeth were divided into four groups (n=14) according to the type of compomer used (conventional compomer, pink colored compomer, blue colored compomer and silver colored compomer). Class V cavities were prepared on the buccal surface of all molars and the teeth were filled as follow: group 1 (conventional compomer Glasiosite A2), group 2 (Twinky star pink), group 3 (Twinky star blue), & group 4 (Twinky star silver). All specimens were thermocycled 500 cycles and soaked in methylene blue dye 2% for 24 hours. The samples were sectioned longitudinally and evaluated for microleakge and dye penetration both occulsally and gingivally under stereomicroscope at 40% magnification. Dye penetration was scored on a 0-4 ordinal scale. Data obtained were statistically analyzed by Kruskal-Wallis, Mann-Whitney and Wilcoxon Rank tests. The level of significance was set at P {u2264} 0.05