IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) e-ISSN: 2279-0853, p-ISSN: 2279-0861.Volume 19, Issue 6 Ser.17 (June. 2020), PP 54-57 www.iosrjournals.org DOI: 10.9790/0853-1906175457 www.iosrjournal.org 54 | Page The Effect of Mouth Rinses On the Color Stability of A Nanohybrid Resin Composite Restorative Material Dr. Ronak Modi 1 , Dr. Mahendra Patel 2 , Dr. Karna Jani 3 , Dr. Parth Chauhan 4 1 (Department of Conservative dentistry and Endodontics, College of dental science and research, Bopal, India) 2 (Department of Conservative dentistry and Endodontics, College of dental science and research, Bopal , India) 3 (Department of Conservative dentistry and Endodontics, , College of dental science and research, Bopal, India) 4 (Department of Conservative dentistry and Endodontics, Goenka Research Institute of dental science, India) Abstract: Aim: The aim of this study is to evaluate the effect of alcohol and nonalcohol containing different mouth rinses on the color stability of a nanohybrid Resin composite restorative material. Materials and Methods: A total of 50 samples of a nano hybrid composite material (Dimethacrylate oligomers Relight Technodent) were prepared and immersed in distilled water for 24 h. Baseline color values were recorded using photoelectric colorimeter 113( Systronics) . Samples were then randomly distributed into five groups: Group I ‑ distilled water (control group), Group II ‑ Hexidine, Group III ‑ Hiora-K, Group IV ‑ Senquel AD,and Group V ‑ Listerine . The postimmersion color values of the samples were then recorded, respectively. Results: Significant reduction in the mean color value (before and after immersion) was observed in nonalcohol containing mouth rinses (P < 0.001). Conclusion: All mouthrinses tested in the present in‑ vitro study caused a color shift in the nanohybrid resin composite restorative material, but the color shift was dependent on the material and the mouth rinse used. Group II (Hexidine) showed maximum color change. Key words: Alcohol and nonalcohol containing mouth rinses ; Nanohybrid composites; Color. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 14-06-2020 Date of Acceptance: 30-06-2020 --------------------------------------------------------------------------------------------------------------------------------------- I. Introduction A quest for an ideal and esthetically acceptable restorative material is probably as old as dentistry itself and patients consciousness of self‑ aesthetics has been enabled by the development of composite resins. Currently, the improvements in adhesive dental technology and patients’ esthetic expectations have resulted in a dramatic increase in the use of direct resin composite restorations for posterior teeth. Innovations are continually being made both in adhesive systems and also in adhesive restorative materials. These innovations have enabled clinicians to combine functionality and esthetics and have led to the introduction of “bulk fill” composites that can be applied as thick as 5 mm. These resin materials not only have enhanced curing properties and have provided low polymerization shrinkage, but are also more flowable and therefore result in better cavity adaptation . They require less chair time and a simpler application procedure. Generally, they are applied in two layers and only the second layer needs sculpting. Discoloration of tooth-colored, resin-based materials may be caused by several intrinsic and extrinsic factors. Intrinsic factors involve the discoloration of the resin material itself, such as alteration of the resin matrix and changes in the interface of matrix and fillers. The resin matrix has been reported as being critical to color stability, and staining may be related to a high resin content and water absorption Color matching plays an important role in achieving good results. However, discoloration of composite resin restorations may occur from time to time, and this unacceptable color change may lead to replacement of these restorations. Extrinsic factors for discoloration of resin composites include staining by adsorption or absorption of colorants from exogenous sources such as coffee, tea, nicotine, beverages, and mouthrinses. The use of antimicrobial mouth rinses is an approach to limiting the accumulation of dental plaque, with a primary objective of controlling the development and progression of periodontal diseases and dental caries. However, frequent use of mouth rinses may have detrimental effects on oral and dental tissues. Despite the increased use of mouth rinses, research comparing resin composite color changes associated with use of mouth rinses is limited. The effect of alcoholcontaining, chlorhexidine-gluconate–containing,and hybrid mouth rinses on the color stability of glass ionomer, compomer, and microhybrid composite resin materials have been evaluated in previous studies.