Abstract

Background: : Although resin composites have advanced significantly and are increasingly used in posterior restorations, polymerization shrinkage stress remains a major challenge in the application of resin-based restorative materials. SDR plus composite material represents a new step forward, addressing the limitations of traditional compostie, decrease shrinkage stress by improving composite formulations, such as increasing filler content or the use of new less shringking monomers to improve marginal integrity and marginal discoloration rate. SDR plus can be placed in 4 mm increments with minimal polymerization stress. SDR flow plus has a self-leveling feature that allows intimate adaptation to the prepared cavity walls. Many in vitro studies have been carried out on this composite, but only a few clinical trials have examined its real-world effectiveness . This study was conducted to evaluate the effectiveness of class II endodontically treated posterior teeth restoration using SDR plus composite material with direct and indirect onlay composite technique.

Methods: A prospective descriptive study with clinical intervention was conducted. Twenty-eight patients aged 15 to 60 years, with 30 teeth class II endodontically treated posterior teeth requiring restoration, were selected and randomly assigned into two groups: one group received conventional direct olay composite restorations, and the other group received indirect onlay composite restorations. Evaluation criteria included aesthetics, function, and durability at baseline and 1 month after restoration. We used modified USPHS criteria to evaluate.

 Results: The results showed that restoration with SDR plus composite achieved a higher success rate (100% A) in both direct and indirect technique at baseline, with aesthetic and functional outcomes. However, after 1 month  the marginal integrity and marginal discoloration rate of the restoration was 93.3% A, with one case was evaluated B in direct technique.

Conclusion: The SDR plus composite is an effective solution for class II endodontically treated posterior tooth restoration, improving the marginal integrity and marginal discoloration rate. The study recommends expanding the use of this material in dental practice in Vietnam.