OBJECTIVE: Our aim was to compare acquired acid resistance in dental enamel after Er:YAG and CO(2) laser irradiation in vitro with additional fluoride treatment. BACKGROUND DATA: The application of lasers in dental hard tissue can impact dental constituents and fluoride with complex interactions. METHODS: Bovine enamels were divided into four groups according to their surface condition: unlased, Er:YAG laser-ablated, fluoridetreated after Er:YAG laser ablation, and CO(2) laser-irradiated after Er:YAG laser and fluoride treatment. Calcium distribution in enamel after pH-cycling process and crystallographical change after laser treatment were evaluated. RESULTS: The crystallinity of enamel was much improved after Er:YAG laser ablation. The CO(2) laser irradiation in the fluoride-treated laser enamel formed alpha-TCP and fluorapatite. The change of calcium distribution in enamel was least in the CO(2) laser-irradiated specimens; the fluoride-treated specimen after Er:YAG laser ablation was next. Additional fluoride treatment both after Er:YAG and before CO(2) laser irradiation improved the acid resistance of enamel. CONCLUSION: Both external treatment of fluoride and irradiation of CO(2) laser after Er:YAG laser ablation greatly reduced calcium loss in enamel during the pH cycling process.
OBJECTIVE: Our aim was to compare acquired acid resistance in dental enamel after Er:YAG and CO(2) laser irradiation in vitro with additional fluoride treatment. BACKGROUND DATA: The application of lasers in dental hard tissue can impact dental constituents and fluoride with complex interactions. METHODS:Bovine enamels were divided into four groups according to their surface condition: unlased, Er:YAG laser-ablated, fluoridetreated after Er:YAG laser ablation, and CO(2) laser-irradiated after Er:YAG laser and fluoride treatment. Calcium distribution in enamel after pH-cycling process and crystallographical change after laser treatment were evaluated. RESULTS: The crystallinity of enamel was much improved after Er:YAG laser ablation. The CO(2) laser irradiation in the fluoride-treated laser enamel formed alpha-TCP and fluorapatite. The change of calcium distribution in enamel was least in the CO(2) laser-irradiated specimens; the fluoride-treated specimen after Er:YAG laser ablation was next. Additional fluoride treatment both after Er:YAG and before CO(2) laser irradiation improved the acid resistance of enamel. CONCLUSION: Both external treatment of fluoride and irradiation of CO(2) laser after Er:YAG laser ablation greatly reduced calcium loss in enamel during the pH cycling process.
Authors: Nai-Yuan N Chang; Jamison M Jew; Jacob C Simon; Kenneth H Chen; Robert C Lee; William A Fried; Jinny Cho; Cynthia L Darling; Daniel Fried Journal: Lasers Surg Med Date: 2017-07-12 Impact factor: 4.025
Authors: Nai-Yuan N Chang; Jamison Jew; Jacob C Simon; Kenneth H Chan; Robert C Lee; William A Fried; Jinny Cho; Cynthia L Darling; Daniel Fried Journal: Proc SPIE Int Soc Opt Eng Date: 2017-02-08
Authors: Jennifer Manuela Díaz-Monroy; Rosalía Contreras-Bulnes; Oscar Fernando Olea-Mejía; María Magdalena García-Fabila; Laura Emma Rodríguez-Vilchis; Ignacio Sánchez-Flores; Claudia Centeno-Pedraza Journal: ScientificWorldJournal Date: 2014-01-27