Aging and Staining Effects on Optical Properties of Flowable Composites

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Resin composites are preferred dental restoratives due to esthetics and improved properties.
• Optimizing resin matrix and filler particles enhances mechanical and optical characteristics.
• Evaluating optical properties like translucency is key for predicting long-term performance.

Purpose of the Study:

• To evaluate changes in color, translucency, and gloss of flowable resin composites after artificial accelerated aging and staining.
• To determine the influence of common staining agents (black tea, coffee, red wine) on these optical properties.
• To assess material and procedure-dependent variations in the response of resin composites.

Main Methods:

• Nine commercial flowable resin composites were subjected to artificial accelerated aging (AAA) and staining.
• Color and translucency were measured using a spectrophotometer before and after treatments.
• Gloss was measured using a small-area glossmeter before and after treatments.
• Statistical analysis included two-way ANOVA and Tukey's post hoc test.

Main Results:

• A significant interaction between material and procedure was found for color changes (p < 0.05).
• All tested composites showed translucency parameter changes within clinically acceptable ranges.
• High gloss retention percentages were observed across all tested composites after treatments.
• Artificial accelerated aging and staining significantly affected color stability, translucency, and gloss retention.

Conclusions:

• Artificial accelerated aging and staining significantly impact the optical properties of flowable resin composites.
• The observed changes in color, translucency, and gloss are dependent on both the specific composite material and the staining procedure.
• While color stability varied, translucency remained within acceptable clinical limits, and gloss retention was generally high.