Chromatic influence of value resin composites.

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Color Science in Dentistry

Background:

• Accurate color matching is crucial for aesthetic dental restorations.
• Understanding the chromatic influence of different composite materials is essential for predictable clinical outcomes.
• Value composites are used to adjust the lightness of dental restorations.

Purpose of the Study:

• To evaluate the chromatic impact of high, medium, and low value composites layered over a standard A2 dentin composite.
• To determine the effect of varying thicknesses of value composites on the final shade.
• To assess the clinical acceptability of color changes induced by value composites.

Main Methods:

• Spectrophotometric analysis using the CIELAB color system was employed.
• Four groups were tested: control (dentin composite only), high value, medium value, and low value composites.
• Value composites were added in thicknesses of 1.0, 0.8, 0.6, and 0.4 mm over a 2.0 mm dentin composite layer.
• Two-way ANOVA and Tukey's HSD test analyzed differences in brightness.

Main Results:

• Significant differences in color and brightness were observed between different value composites and thicknesses.
• The addition of value composites, regardless of type or thickness, resulted in reduced brightness and a graying effect compared to the control.
• Eleven out of twelve subgroups exhibited clinically unacceptable color changes.

Conclusions:

• The use of high, medium, and low value composites significantly impacts the final color of dental restorations.
• A graying effect and reduced brightness are common outcomes when layering value composites.
• A thickness of 0.4 mm for high-value composite was the only tested condition that maintained clinically acceptable color.