Affiliation:
1. Department of Restorative Dentistry State University of Ponta Grossa Ponta Grossa Brazil
2. Department of Restorative Dentistry Universidad Autónoma de Baja California Mexicali Baja California Mexico
3. Area of Stomatology, IDIBO Research Group, Health Sciences Faculty Rey Juan Carlos University Madrid Spain
4. Department of Chemistry State University of Ponta Grossa Ponta Grossa Brazil
Abstract
AbstractObjectiveThis study aims to assess hydrogen peroxide (HP) penetration into the pulp chamber, color change (CC), physical–chemical properties, and material wastage (MW) and material used (MU) in mixing tips when using in‐office bleaching gels with two different mixing tips.Materials and MethodsForty teeth were divided into five groups (n = 8) based on the bleaching gels used (Pola Office +37.5% [PO+] and Whiteness HP Automixx Plus 35% [AM+]) and the mixing tip types (T‐Mixer and Helical). A negative control group was treated with ultra‐purified water. HP concentration was measured using UV–Vis, and CC was evaluated with a digital spectrophotometer. Initial concentration, pH, and viscosity were measured through Titration, a Digital pH meter, and Rheometer, respectively. MW and MU were measured using a precise analytical balance. Statistical analysis included two‐way ANOVA, Tukey's, and Dunnett's test (α = 0.05).ResultsA higher HP concentration was observed with PO+ with the Helical mixing tip in comparison with AM+ (p = 0.01). No significant differences in CC or MU were found for different mixing tips (p = 0.001). The T‐mixer mixing tip resulted in significantly less MW (p < 0.00001) and improved mixture homogeneity and viscosity.ConclusionsUtilizing a T‐mixer with self‐mixing bleaching gels achieves comparable CC while reducing MW. Moreover, it decreases HP penetration when using PO+.Clinical SignificanceFor the application of a self‐mixing in‐office bleaching gel, a T‐mixer mixing tip should be recommended, as it reduces the penetration of hydrogen peroxide into the pulp chamber when using PO+, while also minimizing gel wastage.
Funder
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Cited by
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