8 February 2018 Evaluation of enamel mineral loss around cavities prepared by the Er,Cr:YSGG laser and restored with different materials
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Proceedings Volume 10473, Lasers in Dentistry XXIV; 104730O (2018) https://doi.org/10.1117/12.2291412
Event: SPIE BiOS, 2018, San Francisco, California, United States
Abstract
The aim of this study was to evaluate the enamel demineralization around cavities prepared by Er,Cr:YSGG laser (2780 nm) and restored with different materials after an acid challenge. The human dental enamel samples were randomly divided in 12 groups (n=10): G1- high-speed drill (HD); G2- Er,Cr:YSGG laser L (3 W, 20 Hz, 53.05 J/cm2)(air 65% - water 55%); G3– L (4 W, 20 Hz, 70.74 J/cm2); G4– L (5 W, 20 Hz, 88.43 J/cm2). Each group was divided in subgroups: 1- glass ionomer cement (GIC), 2- resin modified GIC (RMGIC), 3- composite resin (C). Samples were submitted to an acid challenge (4.8 pH) for7 days. The calcium ion contend (ppm/mm2) from demineralizing solutions were analyzed by atomic emission spectrometry. ANOVA and LSD tests were performed (α=5%). The significant lower average values of calcium loss were observed on G2 + GIC, G2 + RMGIC, G1 + RMGIC (p<0.05); the significant higher values were observed on G1 + C, G4 +GIC, G4 + C (p<0.05). The composite resin showed higher calcium loss than RMGIC and GIC (p<0.05). The lased cavities using lower fluence (53.05J/cm2) showed significant reduced demineralization than higher fluences (70.74 and 88.43J/cm2) (p<0.05). Neither the techniques nor the restorative materials used were able to avoid the enamel demineralization. The findings of this in vitro study suggest that the Er,Cr:YSGG lased cavities restored with GIC or RMGIC or conventional drill cavities with RMGIC were effective on reducing the demineralization around restorations, showing an important potential in preventing secondary caries.
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Ricardo Scarparo Navarro, Andréa Dias Neves Lago, Clarissa Calil Bonifácio, Fausto Medeiros Mendes, Patrícia Moreira de Freitas, Alessandra Baptista, Silvia Cristina Nunez, Adriana Bona Matos, José Carlos P. Imparato, "Evaluation of enamel mineral loss around cavities prepared by the Er,Cr:YSGG laser and restored with different materials", Proc. SPIE 10473, Lasers in Dentistry XXIV, 104730O (8 February 2018); doi: 10.1117/12.2291412; https://doi.org/10.1117/12.2291412
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