Effect of Home Bleaching on the Color Matching of Composite Resin Restorations

Abstract

Objective: To investigate the effect of home bleaching on color matching between the dental restoration and the adjacent tooth structure after the staining process. Material and Methods: Ten intact maxillary central incisors were used. After preparation (semimesial restoration of the specimens), the specimens were immersed in a colored solution for 14 days and then were washed and the bleaching process was there after performed. A spectrophotometer apparatus was used to determine the color of the specimens in the part of the tooth filled with restorative material three times, including before the staining process, fourteen days after the staining process and immediately after the bleaching process. Paired t-test was employed to compare the color of the intact tooth and the dental restoration before and after the staining and bleaching processes. The level of significance was set at 5%. Results: Pre-bleaching E color of the teeth was 68.1, which increased to 78.8% after bleaching, and this increase was also statistically significant (p<0.001). Pre and Post-bleaching E color of composite restorations was 65% and 77.6%, respectively. This increase was also statistically significant (p<0.001). Postbleaching E color of the tooth and composite material was 78.8% and 77.6%, respectively. This difference was not statistically significant (p=0.342). Conclusion: The staining and bleaching processes had a significant effect on the discoloration of the dental restoration and the tooth; however, the application of bleaching on the teeth and composite improved the tooth composite color-match.

Evaluation of the Color Matching of Composite Resin Restoration used for Repair with Initial Composite Resin Restoration

“…According to numerous articles, the human eye is able to detect a difference in color with 1 ≤ E; but in dentistry, the usually acceptable value is 3.3> ΔE [3]. In the present study, the difference in the color of the original composite resin and the repair after the second aging was greater than the acceptable clinical value (ΔE = 11.1).…”

“…Of course, the success of restorative materials such as composite resins mostly depends on their color stability over time. So, color change is one of the most common causes of frequent replacement of composite resin restorations, dissatisfaction among patients, and the associated economic problems for the patients [1,3].…”

“…Composite resin restorations color change in the oral environment; but the important issue is the extent of this change of color, which should not be detectable to the eyes [3]. Composite resin color change can be caused by internal or external factors.…”

“…According to some studies, the color change of nanocomposite resins is more than the acceptable clinical level (ΔE> 3/3) and also in some studies, the color change of these composite resins has been clinically acceptable [3,10,11].…”

Does Bleaching Affect the Microleakage of Class II Restoration with Bulk-Fill Composite?

“…Cosmetic dentistry is an important part of dental treatments, and the demand for it is increasing day by day [ 1 ]. Composite resins as the most common cosmetic restorative material used in the anterior part of the mouth best meet aesthetic and durability needs of restorations.…”