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In vitro purple led and argon plasma analysis on the color alteration, mineral content, morphology and safety of dental bleaching

Grant number: 17/08625-0
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): March 01, 2018
Effective date (End): February 28, 2019
Field of knowledge:Health Sciences - Dentistry - Dental Clinics
Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Vanessa Cavalli Gobbo
Grantee:Matheus Kury Rodrigues
Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil


The aim of this project in its first study is to evaluate the in vitro enamel color alteration, intrapulp concentration and enamel morphology alteration after tooth bleaching with a novel purple LED and argon plasma associated or not to peroxides. Moreover, the second study will address the mineral content alteration after the enamel is exposed to the same treatments. The studies will use bovine incisor teeth that either will have the crown maintained to the color, intrapulp and morphology evaluation (n=90) or will be cut into blocks to mineral content analysis. The two sort of specimens will be split into 9 treatment groups: 1) only PC 37%; 2) only PH 35%; %; 3) PC 37% + purple LED; 4) PH 35% + purple LED; 5) only purple LED; 6) PC 37% + plasma 7) PH 35% + plasma; 8) only plasma; 9) no peroxide and no light. Color analysis will be performed using the ”E calculation (color alteration before and after treatments measurements through a spectrophotometer). Furthermore, intrapulp penetration will be obtained by the optic density of the solutions collected from the pulp chamber as well as the mineral content will be evaluated by means of microscopic analysis (EDX and FT-RAMAN) and enamel microbiopsy. All the blocks will be selected after surface's microhardness test. Finally, data will be submitted to exploratory analysis to determine which statistical test is the most adequate. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
KURY, MATHEUS; WADA, ERICA EIKO; DA SILVA, DAYLANA PACHECO; MACHADO TABCHOURY, CINTHIA PEREIRA; GIANNINI, MARCELO; CAVALLI, VANESSA. Effect of violet LED light on in-office bleaching protocols: a randomized controlled clinical trial. Journal of Applied Oral Science, v. 28, . (17/08625-0, 17/23841-1)
KURY, MATHEUS; PERCHES, CAROLINA; DA SILVA, DAYLANA P.; ANDRE, CAROLINA B.; TABCHOURY, CINTHIA P. M.; GIANNINI, MARCELO; CAVALLI, VANESSA. Color change, diffusion of hydrogen peroxide, and enamel morphology after in-office bleaching with violet light or nonthermal atmospheric plasma: An in vitro study. Journal of Esthetic and Restorative Dentistry, v. 32, n. 1, SI, p. 102-112, . (17/08625-0, 17/23841-1)
KURY, MATHEUS; WADA, ERICA EIKO; PALANDI, SAMUEL DA SILVA; DAL PICOLO, MAYARA ZAGHI; GIANNINI, MARCELO; CAVALLI, VANESSA. Colorimetric evaluation after in-office tooth bleaching with violet LED: 6-and 12-month follow-ups of a randomized clinical trial. CLINICAL ORAL INVESTIGATIONS, v. 26, n. 1, . (17/08625-0, 17/24847-3, 17/23841-1)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
RODRIGUES, Matheus Kury. The effect of violet LED and argon plasma on in-office tooth bleaching. 2019. Master's Dissertation - Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba Piracicaba, SP.

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