Color Changes of Veneering Amalgam Restorations with Composite and Compomer Restorative Materials - An in Vitro Study

Journal Article

2003

Published in: Researchgate

Aljazairy, Yousra H. . 2003

Objectives: Composite reins and compomers are popular in dental practice. However, little is known about their esthetic appearance as veneering restorative materials over amalgam restorations. This in-vitro study was designed to assess the color changes of composite and compomer restorative materials, placed in thickness of 1 mm and 2 mm over the gray-background of amalgam. Methods: Twelve cylindrical Teflon molds were filled with amalgam to yield disc-shaped specimens and stored at 37°C and 100% relative humidity for 7 days. Herculite XRV, Vitalecense, Dyract AP and Compoglass F, restorative materials were veneered on each side of the amalgam discs with 1 mm and 2 mm thickness using split molds and following the manufacturers' instructions. A 2 mm thickness disc was fabricated to serve as a control for each restorative material. All samples were subjected to measurement of color utilizing a spectrophotometer. The color parameters L*, a*, b* and color difference DE* were measured. The results were analyzed using one-way ANOVA for each thickness of different materials and Student-Newman-Kreuls test was performed for DE* values at P< 0.05. Results: Relative to control,results revealed statistically significant higher color difference DE* values for the 1 mm thickness than the 2 mm thickness veneers. XRV material had the lowest DE* values for both thicknesses. The color measurements L*, a*, b* showed a color shift from red to green and from yellow to blue for both thicknesses. Conclusions: The thicker veneer specimens were found to have a better quality in appearance than the thinner ones. Only Herculite XRV was found to be clinically acceptable. All materials became darker in color at either thickness.

• Publication Work Type: IADR Abstract
• Volume Number: 82
• Issue Number: Specific Issue B
• Magazine \ Newspaper: Journal of Dental Research
• Pages: B-261