Aim: To evaluate the influence of dental adhesive on the color match of direct laminate veneer.
Materials And Method: Specimens were prepared in the form of discs. B1 nano-filled composite Filtek Z-350 XT (3M-ESPE) and single-bond universal adhesive were used. Twenty discs of each test group with a diameter of 10 ± 0.1 mm and thickness of 0.7 ± 0.1 mm were prepared. The specimens were divided into three groups: control group that has composite material only (C), a group that has adhesive with composite material (AC), and a group that has adhesive with composite and re-bonding technique (ACR). The samples were placed in viewing port for color measurement. Spectrophotometer was used in this study. Descriptive statistical analysis was performed for the CIE L*, a*, and b* values. Statistical software IBM SPSS 16.0 was used for analyzing the data, with a significance level of 0.05 (p < 0.05).
Results: In this study, both groups where bonding agent was applied had significant change in color of the samples (p < 0.05). AC and ACR showed a change along the "a" coordinate and the "b" coordinate with using adhesive and re-bonding technique. There were significant differences when comparing the values of a* and b* of the control group C with AC group and ACR on using adhesive and re-bonding technique. ACR specimens presented the lowest "L" value.
Conclusion: Within the limitations of this study, despite the fact that the change of color is not extensive, the dental adhesive changes the color of direct composite restoration in a way that may warrant caution. Additional studies are essential to substantiate the findings of this study.
Clinical Significance: Dental adhesive play an important role in changing the color of direct composite restoration.
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