Peroxide‐Free Titanium Dioxide Nanoparticle–Based Photocatalytic Bleaching: In Vitro Study on Bovine Teeth
Year: 2025
Type: article
Abstract: Objective: This study is aimed at assessing the bleaching efficacy of titanium dioxide (TiO2) nanoparticle suspensions at different concentrations and exposure times for photocatalysis and evaluating their potential as a peroxide‐free alternative to carbamide peroxide in dental bleaching. Materials and Methods: Sixty bovine incisors were stained with black tea and treated with different bleaching protocols: (1) control (16% carbamide peroxide), (2) TiO 2 ‐50 wt% for 10 min (TiO 2 50/10), (3) TiO 2 ‐50 wt% for 50 min (TiO 2 50/50), (4) TiO 2 ‐10 wt% for 50 min (TiO2 10/50), and (5) TiO 2 ‐10 wt% for 10 min (TiO 2 10/10). The agents were exposed to UV light (395 nm) for photocatalysis before application. All treatments were applied daily for 2 h over 21 days. Color change ( Δ E 00) was measured using a digital spectrophotometer (VITA Easyshade V), and pH was assessed using pH strips. Results: The data were analyzed using one‐way ANOVA and Tukey’s test. TiO 2 50/50 showed significantly superior bleaching effects compared to all other groups ( p < 0.001). TiO 2 10/50 and TiO 2 10/10 demonstrated intermediate bleaching results, with no significant difference between them ( p = 0.0875). The control and TiO 2 50/10 groups exhibited the lowest color variation ( p = 0.102). All groups maintained a pH of 6 before and after 2 h of the at‐home bleaching protocol. Conclusion: TiO 2 nanoparticle suspensions may be a viable peroxide‐free alternative for dental bleaching, particularly at higher concentrations and longer photocatalysis exposure times.
Source: BioMed Research International
DOI: 10.1155/bmri/9311501
Institutions: Paulo Picanço School of Dentistry, University of Iowa
Language: English
Topic: Dental Erosion and Treatment
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $2,680
OpenAlex ID: W4408880041