In vitro evaluation of microleakage of four condensable composites in the proximal aspects of deciduous molars

Abstract

The aim of this study was to evaluate and compare, in vitro, the marginal microleakage of four condensable resins, in deciduous molars: Alert – Jeneric/Pentron, Definite – Degussa, FiltekP60 – 3M and Surefil – Dentsply. Twenty deciduous teeth from the Bank of Deciduous Teeth at FOUSP, clinically intact were selected. Occluso-proximal cavities were prepared in each one. The teeth were divided into four groups, each one containing ten proof bodies for each composite. After the restorations, the molars were isolated with epoxic resin in the region of root, furcation and cro- wn with cosmetic enamel, leaving only the resin/enamel interface in the gingival wall. The samples were submitted to four hours of immersion in 0,5% metilen blue solution and pH 7,2. Then, longi- tudinal cuts were made, allowing an evaluation of the degree of marginal microleakage of the composites. It was concluded that among the tested groups, there was a greater microleakage in the restorations done with P60, existing a statistically significant difference when compared to the other composites. Key words: condensable composi- tes, deciduous teeth, microleakage, composite restorations, deciduous molars.