This study aimed to evaluate the effect of a glaze coating on the surface roughness and color stability of 3D-printed temporary crown resin materials before and after simulated toothbrushing. Nano-filled ceramic resin specimens were fabricated using a 3D printer (Dentafab) with standardized dimensions of 10 mm in diameter and 2 mm in thickness. The specimens were divided into two groups: uncoated specimens serving as the control group and specimens coated with Optiglaze. Surface roughness and color measurements were recorded at baseline and after brushing simulation. Statistical analysis was performed using two-way analysis of variance (ANOVA) and paired-samples t-tests with StatPlus and JASP software, with the level of significance set at P < 0.05. Specimens treated with the glaze coating exhibited lower surface roughness values than the uncoated control group. However, no statistically significant differences were observed within either group before and after brushing. Additionally, simulated brushing did not result in clinically perceptible color changes in either group. Applying a glaze coating to 3D-printed temporary crown resin materials improves surface smoothness while maintaining color stability, even after simulated toothbrushing.
