Impact of CO2 laser and stannous fluoride on primary tooth erosion

Author(s)

Rocha, Cristiane Tomaz ^[1] ; Turssi, Cecilia Pedroso ^{[2, 3]} ; Rodrigues-Junior, Antonio Luiz ^[4] ; Milori Corona, Silmara Aparecida ^[5]

Affiliation

^[1] Univ Fed Ceara, Fac Dent, Sobral Campus, Rua Stanislau Frota S-N, BR-62010560 Sobral, CE - Brazil

^[2] Sao Leopoldo Mandic Inst, Dept Restorat Dent, Rua Doutor Jose Rocha Junqueira 13, BR-13045755 Campinas, SP - Brazil

^[3] Dent Res Ctr, Rua Doutor Jose Rocha Junqueira 13, BR-13045755 Campinas, SP - Brazil

^[4] Univ Sao Paulo, Ribeirao Preto Sch Med, Dept Social Med, Av Cafe S-N, BR-14040904 Ribeirao Preto, SP - Brazil

^[5] Univ Sao Paulo, Ribeirao Preto Sch Med, Dept Restorat Dent, Av Cafe S-N, BR-14040904 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Lasers in Medical Science; v. 31, n. 3, p. 567-571, APR 2016.
• Web of Science Citations: 1

Abstract

This study evaluated in vitro the effect of input power of CO2 laser, either associated or not to stannous fluoride (SnF2) gel, for the control of intrinsic erosion in primary teeth. One hundred four enamel slabs (3 x 3 x 2 mm) from human primary molars were flattened and polished. Adhesive tapes were placed on their surface leaving a window of 3 x 1 mm. Slabs were then cycled four times in 0.01 M hydrochloric acid (pH 2, 2 min) and in artificial saliva (2 h) for creation of erosive lesions. Specimens were randomly assigned into eight groups (n = 13) according to fluoride application {[}absent (control) or 0.4 % stannous fluoride gel (SnF2)] and input power of CO2 laser {[}unlased (control), 0.5, 1.0 or 1.5 W]. The CO2 laser irradiation was performed in an ultra-pulse mode (100 mu s of pulse duration), 4-mm working distance, for 10 s. Specimens were then submitted to further erosive episodes for 5 days and evaluated for enamel relative permeability. Fluoride did not show any protective effect for any of the laser-treated groups or control (p = 0.185). However, a significant effect was detected for input power of CO2 laser (p = 0.037). Tukey's test showed that there was a significant statistically difference between specimens irradiated with 0.5 and 1.5 W (p = 0.028). The input power of 0.5 W showed lower permeability. Variation of input power CO2 laser can influence enamel permeability, at the power of 1.5 W which promoted greater permeability. (AU)

• FAPESP's process: 08/01256-0 - INFLUENCE OF CO2 LASER ASSOCIATED TO A FLUORIDE SOURCE IN THE CONTROL OF DENTAL EROSION IN PRIMARY TOOTH ENAMEL - AN IN VITRO ANALYSIS
• Grantee: Cristiane Tomaz Rocha
• Support Opportunities: Scholarships in Brazil - Doctorate