Objectives. Esthetics is an essential issue for the long-term success of composite resin restoration. Therefore, this study aimed to view the esthetics of universal shade composite resin restorations and to assess its color matching before and after bleaching. Materials and Methods. Overall, 40 freshly extracted premolars were mounted in an acrylic resin mold, and Class V cavities were then prepared and restored by OMNICHROMA composite (Tokuyama Dental, Tokyo, Japan) and polished with 2-step polishing system. Baseline color analysis was performed using VITA Easyshade V digital spectrophotometer, and another color analysis was carried out 24 hours after storage in distilled water. In-office bleaching was carried out, and color measurements were taken after bleaching and 2 weeks postbleaching. The data were statistically analyzed using SPSS 26.0 Windows version statistical software. Changes were considered statistically significant at P  = 0.05. Results. ΔE value of OMNICHROMA restoration before and after restoration was 6.474, 3.529 before and after bleaching, and 3.651 two-weeks postbleaching. In-office bleaching was effective in bleaching the OMNICHROMA specimens as the restoration showed positive ΔL ∗ values, which indicated that the specimens were lighter in color after bleaching; however, the bleaching effect was not maintained after 2 weeks. Conclusion. OMNICHROMA universal shade composite resin restoration showed different color matching values with the adjacent enamel of class Vs. The material appeared lighter in shade postbleaching, and the color change was not maintained 2 weeks postbleaching.

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Highlights Fluoride alone increased the microhardness of the enamel surface. Fluoride alone halted the progression of enamel erosion. Laser irradiation before fluoride-induced similar effects as fluoride alone. Laser irradiation alone did not prevent the progression of enamel erosion.

Purpose: To investigate the effect of neutral sodium fluoride gel (Flor-Opal), Casein phosphopeptide-amorphous Calcium Phosphate is containing paste (GC Tooth Mousse) and nano-carbonate Apatite Paste (n-CAP), on enamel surface roughness and staining ability after home bleaching in vitro.Material and Methods: Eighty enamel specimens were divided into four groups according to enamel surface treatments that were applied after bleaching (n=20). Group 1 (control group) kept in artificial saliva, group 2 assigned to Flor-Opal gel, group 3 for GC Tooth Mousse and group 4 for n-CAP. Baseline average roughness (Ra 1 ) of all surfaces was measured using Talysurf Intra 50 instrument profilometer, and the initial color of the specimens (ΔE) was recorded using Color Eye 7000A Spectrophotometer. The specimens were subjected to bleaching for 2 weeks with 10% carbamide peroxide. After bleaching, the average surface roughness (Ra 2 ) and the color difference (ΔE 1 ) measurements were retaken. Then, surface treatments were applied for 2 weeks according to manufacturer instructions for the four groups then the third average surface roughness (Ra 3 ) was recorded. After that, specimens were stained with coffee 10 minutes per day for 2 weeks. Finally, measurements of color differences after staining were evaluated (ΔE 2 ).Results: Statistically significant increase in surface roughness and color change of all enamel specimens were noticed after bleaching. After the application of the three surface treatments, enamel treated with n-CAP showed a significant reduction in surface roughness (P=0.002) and recorded the lowest color change after staining (ΔE 2 =4.1). The treatment of bleached enamel surfaces with Flor-Opal and GC Tooth Mousse did not significantly reduce the increased roughness resulted from bleaching (p=0.57 and 0.08 respectively). However, no significant difference in color was found between the specimens treated with Flor-Opal, GC Tooth Mousse, and specimens treated with n-CAP after staining. Conclusions: N-CAP was effective in reducing enamel surface roughness resulted from bleaching. Also, n-CAP was able to reduce enamel re-staining after bleaching.

Recently, ceramic veneers have been considered as one of the treatment alternatives for patients with esthetic problems involving anterior teeth, due to their color stability and high resistance against abrasion, requiring minimal tooth preparation. The aim of this study is to report esthetic rehabilitation by replacing the composite resin veneers of the anterior teeth with ceramic veneers in a 40-year-old male patient, who visited the restorative dental clinic at King Saud University, Saudi Arabia. After the clinical examination, the primary impressions were obtained for constructing the diagnostic models. Desired shade for the veneers was selected and previous composite resin veneer restorations were removed and the maxillary anterior teeth were prepared to receive ceramic veneers. Final impression was obtained and temporization was performed. A week later, temporary restorations were removed; subsequently, final cementation of the ceramic veneers was done. Ceramic veneers provide a superior alternative to composite resin veneers for esthetic modification of teeth. They are considered to be a successful treatment option that helps preserve the tooth structure while providing excellent aesthetic results and patient satisfaction.