| Abstract [eng] |
Relevance of the problem. Icon resin has been increasingly used for the treatment of white spot lesions. However, there is little information on the color stability of the resin after infiltration. Additionally, it has also been observed that whitening teeth before Icon resin impregnation can reduce the penetration of Icon resin into the dentin. Aim. To investigate the effect of black coffee and teeth whitening on the color change of Icon resin-impregnated teeth 𝘪𝘯 𝘷𝘪𝘵𝘳𝘰, as well as the effect of whitening on the depth of Icon resin impregnation. Tasks. 1. Evaluate the color change of teeth bleached before Icon resin impregnation and Icon resin-impregnated but not bleached teeth after staining in a coffee solution. 2. Assess the color change of Icon resin-impregnated teeth previously exposed to a coffee solution after whitening. 3. Evaluate the effect of teeth whitening on the depth of Icon resin impregnation. Material and the methods. Sixty extracted human teeth were randomly divided into three groups of 20 teeth each. Demineralized white spots were created on the buccal surface of the teeth in the second and third groups. The teeth in the second group were bleached, and the color of the teeth in all 3 groups was determined. After 14 days, the second and third groups were impregnated with Icon resin and placed with the teeth from the first group in a black coffee solution for eight days. The color of the teeth was evaluated. Teeth in the first and third groups were bleached, and their color was determined. The depth of Icon resin impregnation was assessed by immersing samples in a 10 percent methylene blue dye for 24 hours, longitudinally cutting the teeth with a microtome and measuring the depth of Icon resin impregnation using a stereomicroscope and NIS-Elements D 5.42.01 64-bit program. Statistical analysis was performed using the IBM SPSS Statistics 29.0 program (independent samples t-test). Results. The change in tooth color in group 2 (5.365 ± 2.596) after coffee staining was greater than that of group 3 (4.456 ± 2.643) (p = 0.279). However, the change in tooth color in group 3 (10.961 ± 3.591) was statistically significantly higher (p < 0.001) after the teeth whitening procedure compared to the change in tooth color in group 1 (5.870 ± 1.164). Icon impregnation depth was higher in group 3 (514.52 ± 194.67 μm) compared to group 2 (88.77 ± 42.98 μm) (p < 0.001). Conclusions. 1. Teeth bleached and then impregnated with Icon resin exhibit more pigmentation when stained in coffee solution. 2. Whitening teeth after staining results in more effective removal of coffee pigment in Icon resin-impregnated teeth compared to the control group. 3. Teeth whitening before Icon resin impregnation negatively affects the depth of Icon resin impregnation. Keywords. Icon, resin infiltration, teeth whitening, coffee. |
