Influence of concentrations of titanium dioxide nanotubes incorporated into a 37% carbamide peroxide bleaching agent and violet LED light activation on tooth color change.

Authors

Rodrigo Dacoreggio, Natália Russo Carlos, Kamila Rosamilia Kantovitz, Erika Soares Bronze-Uhle, Paulo Noronha Lisboa Filho, Roberta Tarkany Basting

Published in

Odontology. Apr 24, 2025. Epub Apr 24, 2025.

Abstract

The aim of this study was to evaluate the effectiveness of incorporating different concentrations (0, 1, and 5%) of titanium dioxide nanotubes (TiO₂) into a 37% carbamide peroxide (CP) bleaching agent with or without activation by violet LED light (L) on tooth color change. Eighty bovine incisors were separated into eight groups (n = 10) according to the concentration of TiO₂ incorporated into CP, and L activation: HP (hydrogen peroxide 35%), CP, CPT1 (CP + 1% TiO₂), CPT5 (CP + 5% TiO₂), HPL, CPL, CPT1L, and CPT5L. The bleaching agents were applied for 30 min (3 sessions). When L was associated, it was applied in 20 cycles of 60 s with a 30 s interval. Color analysis was performed at baseline, and 7 days after the 1st, 2nd, and 3rd sessions (CIEL*a*b* and ΔE_ab, ΔE₀₀, and WI_D). All the groups showed a significant increase in L* and a significant decrease in b* compared with the baseline (p < 0.05), but there were no significant differences within each group (p > 0.05). After the 2nd session, CPT1L and CPT5L showed greater variation in color change (ΔE_ab, ΔE₀₀, and ∆WI_D) (p < 0.05) compared with the respective groups without L. L activation was a determining factor for greater bleaching efficacy in the 2nd session, when CP was incorporated into TiO₂ in both concentrations (1% or 5%). TiO₂ association suggests increased effectiveness in color change when L is applied in the 2nd bleaching session, and may lead to less pulp damage when associated with a lower bleaching agent concentration.

PMID:
40272757
Bibliographic data and abstract were imported from PubMed on 24 Apr 2025.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.