Please use this identifier to cite or link to this item:
|dc.title||Optimal Er:YAG laser energy for preventing enamel demineralization|
|dc.identifier.citation||Liu, J.-F., Liu, Y., Stephen, H.C.-Y. (2006). Optimal Er:YAG laser energy for preventing enamel demineralization. Journal of Dentistry 34 (1) : 62-66. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jdent.2005.03.005|
|dc.description.abstract||Objectives: The purpose of this study was to identify the optimal laser energy range of Er:YAG laser irradiation for laser-induced caries prevention (LICP). Methods: Twenty-one human non-carious molars were selected. The teeth were covered with nail varnish, except two 4 mm x 1 mm windows on both the buccal and lingual surfaces. The windows were randomly assigned to groups A, B, C and D, receiving no irradiation, 100, 200 and 300 mJ irradiation, respectively. The pulse width 10 pps (pulse per second) with a 1.0 mm spot size was used. After the laser treatment, each tooth was cut into two halves longitudinally. Then a two-day pH-cycling was performed, with an 18-hour demineralization followed by a 6-hour remineralization. Sections of 120±20 μm in thickness were obtained from each window. Lesion depth was measured using polarized light microscope coupled with an image analysis software. One-way ANOVA and post-hoc Tukey tests were used for evaluation of treatment effects. Results: The laser treatments of 100 and 200 mJ have demonstrated significant protection of enamel demineralization (p=0.01 and 0.001, respectively), but not the treatment with 300 mJ (p=0.106). A smaller lesion depth was observed for the 200 mJ group (97.1 μm) than that of the 100 mJ group (105.6 μm). Compared with the control, a lesion reduction of 32.78 and 26.93% for the 200 mJ group and the 100 mJ group were obtained, respectively. Conclusion: Caries prevention may be achieved by using Er:YAG laser treatment if the optimal range of laser parameters for LICP can be employed. © 2005 Elsevier Ltd. All rights reserved.|
|dc.subject||Polarized light microscopy|
|dc.description.sourcetitle||Journal of Dentistry|
|Appears in Collections:||Staff Publications|
Show simple item record
Files in This Item:
There are no files associated with this item.
checked on Sep 14, 2019
WEB OF SCIENCETM
checked on Jul 8, 2019
checked on Sep 9, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.