Effect of P60 & Filtek P90 Composite on microeakage of Cl II Composite resin restoration (Invitro)

microleakge is one of the most common cause of failure in restorative dentistry in this study the microleakge of filtek p90 , filtek p60 was evaluated and compared . In this experimental study, on 48 premolar teeth standardized class II MOD preparations were made cervical margin of mesial preparation were 1mm above the CEJ and 1 mm and the distal preparation were 1 mm below the CEJ Samples divided in to 3 groups of sixteen teeth. A group: teeth were filled with filtek silorane (3M ESPE , USA) and silorane system adhesive self-etch primer and bond. B: teeth were filled with filtek silorane and Adper single bond plus. C: sixteen teeth were filled with filtek p60 and Adper single bond plus. After AgNO3 dye opplicaiton microleakage were evaluated by stereomicroscope.data were statistically analyzed by kurskal-wallis and Wilcoxon. the level of 0.05 considered significant. The most enamel microleakage was related to C and lowest enamel microleakge was shown in A group. The most dentin microleakage was related to B and the lowest dentin microleakge was shown in A group. Microleakage was significantly different between A, with B and C (P‹0.05) dentin microleakage was not significant difference between B and C. Type of composite and bonding effect to microleakage, the lowest microleakage was gingival margine irrespective of the location of the margine related to group A.