Clinical Evaluation of SI-R21204 Versus Nano-hybrid Resin Composite: A Prospective Controlled Clinical Trial

Despite the advances in adhesive restorative techniques and materials, dental caries still remains a critical concern even today. In addition, recurrent caries related to microleakage is a common mode of failure of directly placed resin composite restorations. Resin composites are particularly susceptible to recurrent caries due to polymerization contraction and also imperfect adhesion of restorative to tooth tissue. Thus, strong durable bond between adhesive restoratives and tooth tissue and increasing the resistance of teeth to acid by encouraging the development of remineralization are essential to withstand secondary caries. Fluoride has been documented as a major contributing factor for the decline in the incidence of dental caries and also it has been accepted as an agent in the prevention of caries. Giomers are a new group of anhydrous resin based direct adhesive restorative materials based on the filler technology (PRG) have both advantages of glass ionomers namely, fluoride release and recharge, and resin composites with excellent optical and mechanical properties. The chemistry of Giomer materials facilitates fluoride ion release with the potential for a lower incidence of recurrent caries that was accepted as a major factor to retreat a resin restoration. Limited number of studies is available on their fluoride release, and polishability, as well as clinical survival. The objective of this controlled clinical trial is to evaluate the clinical performance of restorative material "SI-R21204 resin composite" versus a "nano-hybrid resin com-posite" materials for Class I and Class II cavities that needs to be restored in per-manent teeth.40 patients are recruited to the project which is carried out at the School of dentistry, Istanbul Medipol University, Turkey.