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de Mendonça LC, Rodrigues M, Bicalho AA, da Silva GR, Quagliatto PS, Santos DQ, Soares CJ. Analysis of Calcium and Phosphate Ion Extraction From Dental Enamel by Bleaching Gels Using Ion Chromatography, Micro-CT, and SEM. Oper Dent 2024; 49:157-165. [PMID: 38349817 DOI: 10.2341/23-026-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2023] [Indexed: 02/15/2024]
Abstract
OBJECTIVES To evaluate the volume and depth of enamel loss promoted by 37.5% and 7.5% hydrogen peroxide (HP) gels, and quantify the loss of calcium (Ca) and phosphate (P) ions by using ion chromatography (IC) analysis after bleaching. METHODS Sixty bovine enamel specimens were randomly divided into three groups: Control - no bleaching gel; HP37.5%, application of HP 37.5% for 45 minutes for 14 days; and HP7.5%, application of HP 7.5% for 3 applications of 8 minutes. The surface analysis (n=5) was performed using a scanning electron microscope (SEM) and dispersive energy system (EDS) to calcium and phosphorus dosage. The micro-CT was used for the enamel loss analysis (n=5). IC was used to analyze extracted Ca and P (n=10). Data were analyzed by one-way ANOVA and two-way repeated measures ANOVA, followed by Tukey and Dunnett's tests (α=0.05). RESULTS Significantly higher volume and depth of enamel loss were found for bleached groups compared with the control group. HP7.5% had significantly higher enamel change than HP37.5%. SEM showed higher enamel porosity for HP37.5% and HP7.5% compared to control. The IC demonstrated a significant increase of Ca incorporated into the gel, however, only HP7.5% had a higher P presence than the control group. The HP7.5% showed higher Ca and P ion exchange than HP37.5% (p<0.001). CONCLUSION HP37.5% and HP7.5%, caused enamel mineral changes compared with the control group. The IC method was demonstrated to be an effective methodology for detecting enamel mineral loss by the bleaching gel.
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Affiliation(s)
- L C de Mendonça
- Ludmila Cavalcanti de Mendonça, DDS, MS, PhD student, Biomechanics Group, Department of Operative Dentistry and Dental Materials; professor, Technical School of Health, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - MdeLA Rodrigues
- Maria de Lara Araújo Rodrigues, DDS student, Biomechanics Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - A A Bicalho
- Aline Arêdes Bicalho, DDS, MS, PhD, Biomechanics Group, Department of Operative Dentistry and Dental Materials; professor, Technical School of Health, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - G R da Silva
- Gisele Rodrigues da Silva, DDS, MS, PhD, professor, Biomechanics Research Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - P S Quagliatto
- Paulo Sérgio Quagliatto, DDS, MS, PhD, professor and chairman, Biomechanics Research Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - D Q Santos
- Douglas Queiros Santos, DDS, MS, PhD, professor, Technical School of Health, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - C J Soares
- *Carlos José Soares, DDS, MS, PhD, professor and chairman, Biomechanics Research Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
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Lima AL, Lima AP, Portela FM, Santos DQ, Neto WB, Hernández-Terrones MG, Fabris JD. Parâmetros da reação de transesterificação etílica com óleo de milho para produção de biodiesel. Eclet Quím 2010. [DOI: 10.1590/s0100-46702010000400013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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