In Situ Effect of Dentifrices Associated to CO2 Laser in the Permeability of Eroded Root Dentin

Author(s)

Scatolin, Renata Siqueira ^[1] ; Galo, Rodrigo ^[2] ; Milori Corona, Silmara Aparecida ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Restorat Dent, Dent Sch Ribeirao Preto, BR-14040904 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Dept Dent Mat & Prosthet Dent, Dent Sch Ribeirao Preto, BR-14040904 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Photomedicine and Laser Surgery; v. 30, n. 10, p. 573-578, OCT 2012.
• Web of Science Citations: 1

Abstract

Objective: The aim of this study was to evaluate, through a crossover 2 x 2 in situ trial, the effect of a desensitizing dentifrice associated with CO2 laser irradiation to control the permeability of eroded root dentin. Background data: Facing the increased prevalence of erosive lesion and the need for preventive means to control painful symptoms related to them. Methods: Eighty slabs of bovine root dentin were subjected to initial erosive challenge (citric acid 0.3%, 2 h), followed by a remineralizing period in artificial saliva (24 h). Specimens were then divided according to dentin treatment: desensitizing dentifrice, desensitizing dentifrice + CO2 laser, fluoride anticavity dentifrice. and fluoride anticavity dentifrice + CO2 laser. After a 2-day lead-in period, 10 volunteers wore an intraoral palatal appliance containing four root dentin slabs, in two phases of 5 days each. During the intraoral phase, one side of the appliance was immersed in 0.3% citric acid, and the opposite side was immersed in deionized water, four times a day. One hour after the immersions, all specimens were brushed with dentifrice slurry provided by the researcher. After a 7-day washout period, volunteers were crossed over on the different dentifrice group. Each phase having been completed, the specimens were evaluated for permeability through an optical microscope. Results: Data were analyzed using ANOVA and no significant difference (p = 0.272) was found between the surface treatments performed on bovine root dentin. Conclusions: It can be concluded that fluoride anticavity or desensitizing dentifrice, regardless of the association with the CO2 laser irradiation, was able to control the permeability of eroded root dentin. (AU)

• FAPESP's process: 10/03180-1 - In situ effect of dentifrices associated to CO2 laser in the dentinary permeability after simulation of erosive challenges
• Grantee: Renata Siqueira Scatolin
• Support Opportunities: Scholarships in Brazil - Master