COMPARISON OF SUCCESS RATE OF CLASS 2 DIRECT POSTERIOR COMPOSITE RESTORATIONS PERFORMED WITH BULK FILL BASE OF SMART DENTIN REPLACEMENT (SDR) AND WITHOUT BULK-FILL BASE OF SMART DENTIN REPLACEMENT (SDR). A 2 YEAR CLINICAL STUDY

Abstract

Resin composites have long been advocated for use in posterior class I and II restorations with appreciable success rate. But their biggest disadvantage till date has been their polymerization shrinkage. To overcome this disadvantage, the conventional oblique incremental layering technique has been used with success over time . But recently a better solution has been brought forward with the use of SDR (Smart Dentin Replacement) which is actually a bulk-fill flowable resin composite. It was designed to facilitate fewer composite increment placement. For the purpose of reducing polymerization shrinkage and stresses, it has been advocated for use as a stress breaking liner underneath an occlusal layer of the traditional nano-hybrid composite material itself. The objective of this study was to compare the frequency of success of direct posterior class 2 composite restorations performed with and without bulk-fill base of smart dentin replacement. In this study 211 patients were included having age from 18 to 60 years, which were equally divided into two groups with both males and females. Group A (with SDR) have 68 ( 61.3%) males and 48 (38.7%) females while Group B ( without SDR) have 73 ( 65.5%) males and 38 ( 34.5%) females. Group A ( with SDR) have a success rate of 97.4% and Group B ( without SDR) 89% success on 2 year follow up. In conclusion there is a clear difference in frequency of success of direct posterior class 2 composite restorations performed with and without bulk-fill base of smart dentin replacement.