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This study evaluated the effect of CO 2  laser irradiation and topical fluoride therapy in the control of caries progression on primary teeth enamel. 30 fragments (3 × 3 × 2 mm) from primary canines were submitted to an initial cariogenic challenge that consisted of immersion on demineralizing solution for 3 hours and remineralizing solution for 21 hours for 5 days. Fragments were randomly assigned into three groups ( n  = 10): L: CO 2  laser ( λ  = 10.6  μ m), APF: 1.23% acidulated phosphate fluoride, and C: no treatment (control). CO 2  laser was applied with 0.5 W power and 0.44 J/cm 2  energy density. Fluoride application was performed with 0.1 g for 1 minute. Cariogenic challenge was conducted for 5 days following protocol previously described. Subsurface Knoop microhardness was measured at 30  μ m from the edge. Obtained data were subjected to analysis the variance (ANOVA) and Duncan test with significance of 5%. It was found that the L group showed greater control of deciduous enamel demineralization and were similar to those of APF group, while being statistically different from C group ( P  ≤ 0.05) that showed the lowest microhardness values. It was concluded that CO 2  laser can be an additional resource in caries control progression on primary teeth enamel.

CO2Laser and Topical Fluoride Therapy in the Control of Caries Lesions on Demineralized Primary Enamel

CO₂Laser and Topical Fluoride Therapy in the Control of Caries Lesions on Demineralized Primary Enamel