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Loguercio AD, Vargas L, Favoreto MW, Andrade HF, Borges CF, Dávila-Sánchez A, Reis A, Mora CP. Effects of Microabrasion Prior to In-office Bleaching on Hydrogen Peroxide Permeability, Color Change, and Enamel Morphology. Oper Dent 2021; 46:661-668. [PMID: 35507901 DOI: 10.2341/20-179-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2020] [Indexed: 11/23/2022]
Abstract
PURPOSE This study evaluated hydrogen peroxide (HP) diffusion within the pulp chamber, as well as color change and the surface morphology of teeth subjected to various microabrasion (MA) protocols associated or not with in-office (IO) bleaching. METHODS Forty sound premolars were randomly divided into the following four groups (n=10): no treatment (NC); IO bleaching only; IO immediately after MA (IMA), and IO seven days after MA (7MA). After treatments, the HP concentration (μg/mL) within the pulp chamber was determined using ultraviolet-visible (UV-Vis) spectrophotometry. The color change (ΔE*) was evaluated using the digital spectrophotometer before and 1 week after bleaching. The surface morphology was evaluated by scanning electron microscope (SEM). Data from each test were submitted to one-way ANOVA and Tukey tests (α=0.05). RESULTS All experimental groups exhibited higher HP concentrations compared to the NC group (p<0.00001). However, higher amounts of HP were observed for the IMA group compared to the IO and 7MA groups (p<0.00001). No significant difference in color change was observed among the groups (p<0.001). Pronounced grooves in enamel were found in the IMA and 7MA groups. However, enamel erosion areas were observed only in the 7MA group. CONCLUSIONS The association between MA and IO bleaching could significantly affect the amount of HP inside the pulp chamber. Therefore, it is highly recommended to wait for 1 week after MA procedures before performing IO bleaching.
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Affiliation(s)
- A D Loguercio
- *Alessandro D Loguercio, PhD, State University of Ponta Grossa, Ponta Grossa, Parana, Brazil
| | - Ljc Vargas
- Lina Johanna Calderón Vargas, DDS, Department of Oral Health, National University of Colombia, Bogotá, Colombia
| | - M W Favoreto
- Michael W Favoreto, DDS, Ms student, Department of Restorative Dentistry, State Universityof Ponta Grossa, Parana, Brazil
| | - H F Andrade
- Heloisa F Andrade, DDS, Ms student, Department of Restorative Dentistry, State University ofPonta Grossa, Parana, Brazil
| | - Cp F Borges
- Christiane Philippini F Borges, DDs, Ms, PhD, Department of Chemistry, State University of Ponta Grossa, Parana, Brazil
| | - A Dávila-Sánchez
- Andrés Dávila-Sánchez, DDs, Ms, PhD, Department of Restorative Dentistry, San Francisco deQuito University, Quito, Ecuador
| | - A Reis
- Alessandra Reis, DDS, PhD, Department of Restorative Dentistry, State University of PontaGrossa, Parana, Brazil
| | - C P Mora
- Camilo P Mora, DDs, Ms, PhD, Department of Oral Health, National University of Colombia,Bogotá, Colombia
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