CO2 laser emission modes to control enamel erosion

Autor(es)

Scatolin, Renata Siqueira ^[1] ; Alonso-Filho, Fernando Luiz ^[1] ; Galo, Rodrigo ^[2] ; Rios, Daniela ^[3] ; Borsatto, Maria Cristina ^[4] ; Milori Corona, Silmara Aparecida ^[1]

Afiliação do(s) autor(es)

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

^[2] State Sao Paulo Univ, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, BR-14803901 Sao Paulo - Brazil

^[3] Univ Sao Paulo Bauru, Dent Sch Bauru, Dept Pediat Dent Orthodont & Publ Hlth, BR-17012901 Sao Paulo - Brazil

^[4] Univ Sao Paulo, Dent Sch Ribeirao Preto, Dept Pediat Clin, BR-14040904 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MICROSCOPY RESEARCH AND TECHNIQUE; v. 78, n. 8, p. 654-659, AUG 2015.
• Citações Web of Science: 4

Resumo

Considering the importance and prevalence of dental erosion, the aim of this in vitro study was to evaluate the influence of different modes of pulse emission of CO2 laser associated or not to acidulated phosphate fluoride (APF) 1.23% gel, in controlling enamel erosion by profilometry. Ninety-six fragments of bovine enamel were flattened and polished, and the specimens were subjected to initial erosive challenge with hydrochloric acid (pH=2). Specimens were randomly assigned according to surface treatment: APF 1.23% gel and gel without fluoride (control), and subdivided according to the modes of pulse CO2 laser irradiation: no irradiation (control), continuous, ultrapulse, and repeated pulse (n=12). After surface treatment, further erosive challenges were performed for 5 days, 4 x 2 min/day. Enamel structure loss was quantitatively determined by a profilometer, after surface treatment and after 5 days of erosive challenges. Two-away ANOVA revealed a significant difference between the pulse emission mode of the CO2 laser and the presence of fluoride (P0.05). The Duncan's test showed that CO2 laser irradiation in continuous mode and the specimens only received fluoride, promoted lower enamel loss than that other treatments. A lower dissolution of the enamel prisms was observed when it was irradiated with CO2 laser in continuous mode compared other groups. It can be concluded that CO2 laser irradiation in continuous mode was the most effective to control the enamel structure loss submitted to erosive challenges with hydrochloric acid. Microsc. Res. Tech. 78:654-659, 2015. (c) 2015 Wiley Periodicals, Inc. (AU)

• Processo FAPESP: 09/15201-6 - Influência do tipo de pulso do laser de CO2 associado a uma fonte de fluoreto no controle da erosão em esmalte
• Beneficiário: Fernando Luiz Alonso Filho
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica