In vitro study evaluates surface roughness, color stability, and gloss in composite resins, indicating material performance differences.
Key Points
To evaluate the impact of simulated toothbrushing on the surface properties of two single-shade composite resins and their interrelations.
In vitro study with two single-shade composite resin materials
Preparation of disk-shaped specimens subjected to simulated toothbrushing
Measurement of surface roughness, color stability, and gloss pre- and post-brushing
Analysis using ANOVA, t-tests, and correlation analysis
Both composite materials exhibited increased surface roughness after brushing.
Material B showed significantly higher surface roughness after 10,000 cycles compared to Material A (p < 0.01).
After 15,000 cycles, Material B had more color change (ΔE00: 2.21) exceeding the clinical acceptability threshold compared to Material A (ΔE00: 1.48) (p < 0.001).
Material B also had greater gloss reduction (60% vs. 35%, p < 0.001).
Surface roughness strongly correlated with both gloss (r = −0.919) and color changes (r = 0.826).