Effect of light and disinfection solutions on optical stability of shade guides for Dentistry

• Grant number: 15/00848-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2015
• End date: April 30, 2016
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Fernanda de Carvalho Panzeri
• Grantee: Eduardo José Soares
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

The color selection procedure of restorative materials depends on a shade guide and is closely related to the esthetic quality of the restoration. This study aims to access the effect of light and disinfectant solutions in optical stability of shade guides used for color selection of esthetic restorative materials. Fifty shade guides (Biotone IPN, Dentsply) will be submitted to the initial color reading (Easyshade, Vita) with the use of standardizing device position for readouts. Then it will be separated into 5 groups (n=10) according to the treatment that will be submitted. The G1 will be submitted to the action of distilled water (control). G2 and G3 will be subjected to a alcohol 70% and 1% sodium hypochlorite disinfection, respectively, by means of spraying the solutions simulating 6 months of use in practice. The G4 will be kept in complete absence of light (control) and the G5 Group will be maintained under the action of fluorescent light of the environment by the same trial period, after which the final color readouts will be obtained. The values obtained for color stability (“E) and their coordinates for each color of the shade guide will be analyzed according to the distribution of the data and the appropriate statistical test.

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)

SOARES, EDUARDO JOSE; TONANI, RAFAELLA; MARTINS GIAMATEI CONTENTE, MARTA MARIA; FERRAZ ARRUDA, CAROLINA NORONHA; PANZERI PIRES-DE-SOUZA, FERNANDA DE CARVALHO. Color stability of denture shade tabs is affected by exposure to daylight and decontamination protocols. COLOR RESEARCH AND APPLICATION, v. 43, n. 5, p. 779-784, OCT 2018. (15/00848-5)