Marginal Integrity of Composite Restoration with and without Surface Pretreatment by Gold and Silver Nanoparticles vs Chlorhexidine: A Randomized Controlled Trial

Abstract

Aim: This study was conducted to evaluate the marginal adaptation, marginal staining, and postoperative sensitivity of resin composite restorations after disinfection of class II cavities with NanoCare Gold and chlorhexidine in class II cavities immediately, after 6 months, 1, and 2 years using World Dental Federation (FDI) criteria for assessment of dental restorations. Materials and methods: In this study, 19 participants were recruited, 3 carious lesions in each one. After preparation of these lesions, they were randomly allocated into three parallel groups according to the disinfection protocol. The first group was for NanoCare Gold, the second was for chlorhexidine, and the third was for the control. The three groups were evaluated clinically and radiographically using (FDI) criteria at different intervals till 2 years of clinical service. Results: There was no statistically significant difference in age, gender, arch, and tooth type distribution among study groups. Regarding marginal adaptation, there was no statistically significant difference among the different groups but the difference was only statistically significant within each group after 2 years. Regarding the marginal staining, the difference was only significant between the NanoCare and the other groups after 2 years. In case of postoperative sensitivity, there was no statistically significant difference among the different groups and within each one at different intervals. Conclusion: NanoCare Gold could be promising in durability preservation of direct tooth-colored restorations. Marginal staining and postoperative sensitivity are regulated by other factors than surface pretreatment. Clinical significance: As long as restorations are inserted under rubber dam isolation, proper application steps, proper filling, and adequate finishing and polishing, the performance of the restorations would be satisfactory up to 1 year without any surface disinfection. However, after a longer follow-up, some changes may be noticed. NanoCare Gold and chlorhexidine are accepted as a cavity disinfectant without any negative effect on marginal adaptation of resin composite restorations.