Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] · 2026
Effect of Successive Bleaching Treatments Followed by Staining on Color, Whiteness, and Translucency of Polymer-Based CAD-CAM Materials.
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Ramos Alejandro Cardenas, Mascaro Bruno Arruda, Dos Santos Nunes Reis José Maurício, Dovigo Lívia Nordi, Pérez María M, Fonseca Renata Garcia
Аннотация
OBJECTIVE: To evaluate differences in color, whiteness, and translucency of CAD-CAM materials after successive bleaching treatments and coffee immersion.
MATERIALS AND METHODS: Lava Ultimate (LU) and VITA Enamic (VE) were divided into four groups (n = 12): untreated (control), 35% hydrogen peroxide (WH), 10% carbamide peroxide (OP), or WH followed by OP (WHOP). Color measurements were taken at baseline (T 0) and after three consecutive bleaching sessions, each followed by coffee exposure (T 1, T 2, and T 3). Differences in color (ΔE 00), whiteness (ΔWID), and translucency (ΔRTP00) were statistically analyzed for each material using two-way ANOVA and Bonferroni's tests and interpreted based on their respective perceptibility and acceptability thresholds. Surface topography was assessed by scanning electron microscopy.
RESULTS: For LU, there were no differences in ΔE 00 and ΔWID among bleaching treatments. The second and third sessions increased ΔE 00 and ΔWID values. The WH showed the greatest imperceptible ΔRTP00. In VE, no treatment increased ΔE 00, and only OP showed higher ΔE00 in T 3-T 0 compared with T 1-T 0, but it was still imperceptible. All treatments decreased ΔWID in T 2-T 0 and T 3-T 0, with no significant differences in ΔRTP00 compared with control. Except for WHOP, there were no statistical differences among sessions for ΔRTP00. Only WH in VE did not result in topographic changes.
CONCLUSIONS: Successive bleaching treatments and coffee immersion resulted in imperceptible or deemed acceptable color, whiteness, and translucency changes of LU and VE.
CLINICAL SIGNIFICANCE: Despite the surface topographic changes, all the bleaching methods tested in up to three sessions each followed by exposure to coffee did not adversely affect the esthetic durability of Lava Ultimate and VITA Enamic CAD-CAM materials.
MATERIALS AND METHODS: Lava Ultimate (LU) and VITA Enamic (VE) were divided into four groups (n = 12): untreated (control), 35% hydrogen peroxide (WH), 10% carbamide peroxide (OP), or WH followed by OP (WHOP). Color measurements were taken at baseline (T 0) and after three consecutive bleaching sessions, each followed by coffee exposure (T 1, T 2, and T 3). Differences in color (ΔE 00), whiteness (ΔWID), and translucency (ΔRTP00) were statistically analyzed for each material using two-way ANOVA and Bonferroni's tests and interpreted based on their respective perceptibility and acceptability thresholds. Surface topography was assessed by scanning electron microscopy.
RESULTS: For LU, there were no differences in ΔE 00 and ΔWID among bleaching treatments. The second and third sessions increased ΔE 00 and ΔWID values. The WH showed the greatest imperceptible ΔRTP00. In VE, no treatment increased ΔE 00, and only OP showed higher ΔE00 in T 3-T 0 compared with T 1-T 0, but it was still imperceptible. All treatments decreased ΔWID in T 2-T 0 and T 3-T 0, with no significant differences in ΔRTP00 compared with control. Except for WHOP, there were no statistical differences among sessions for ΔRTP00. Only WH in VE did not result in topographic changes.
CONCLUSIONS: Successive bleaching treatments and coffee immersion resulted in imperceptible or deemed acceptable color, whiteness, and translucency changes of LU and VE.
CLINICAL SIGNIFICANCE: Despite the surface topographic changes, all the bleaching methods tested in up to three sessions each followed by exposure to coffee did not adversely affect the esthetic durability of Lava Ultimate and VITA Enamic CAD-CAM materials.