Effect of fluoride solutions supplemented microparticulate sodium hexametaphosphate on the surface free energy of tooth enamel

• Grant number: 15/20829-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2015
• End date: November 30, 2016
• Field of knowledge: Health Sciences - Dentistry - Pediatric Dentistry
• Principal Investigator: Marcelle Danelon
• Grantee: Leonardo Raniel Figueiredo
• Host Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil

Abstract

Phosphates have the ability to modify the surface of hydroxyapatite (HA), through adsorption on the enamel. Knowing that property, the objective of this study is to evaluate the hexametaphosphate adsorption capacity of microparticle sodium (HMP) associated or not with fluoride (F) on the tooth enamel. Bovine enamel blocks (4 mm x 4 mm, n = 96; 12 packs / group) are selected, through the surface hardness (SH) and then treated by immersion in solutions containing HMP at concentrations of 0.25%; 0.5%; 1.0%. These HMP concentrations are associated or not with F at a concentration of 1100 ppm F. A negative control solution without F / HMP (Placebo) will also be used. Shall be determined concentrations of F and inorganic phosphorus (Pi) before and after the treatment to calculate the adsorption thereof to the enamel. To analyze the mechanism of interaction of HMP / F with the enamel surface, the measured contact angle is measured on the surface of the enamel block in order to determine the surface free energy. The most appropriate statistical test of distribution of the data will be used by the statistical program Sigmaplot © software for Windows version 12.0, with a significance level of 5%.

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)

NEVES, JOSE GUILHERME; DANELON, MARCELLE; PESSAN, JULIANO PELIM; FIGUEIREDO, LEONARDO RANIEL; CAMARGO, EMERSON RODRIGUES; BOTAZZO DELBEM, ALBERTO CARLOS. Surface free energy of enamel treated with sodium hexametaphosphate, calcium and phosphate. ARCHIVES OF ORAL BIOLOGY, v. 90, p. 108-112, JUN 2018. (15/20829-5)