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KMID : 1035320150420020083
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Korean Society for Dental Materials
2015 Volume.42 No. 2 p.83 ~ p.93
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Preventive effect evaluation of fluoride varnish demineralization in orthodontic patients using quantitative light-induced fluorescence(QLF) and scanning electron microscope(SEM)
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Lee Han-Chul
Kim Eun-Jung
Lee Jae-Young
Paik Dai-Il
Jin Bo-Hyoung
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Abstract
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Orthodontic appliances are induced deposition of dental plaque and make poor oral hygiene. During orthodontic therapy, appliances make opportunity of demineralization. For this reason, various fluoride-products are used to prevent such a demineralization. Among the fluoride-products, fluoride varnish are less dependent on patient cooperation and release for a long time in the form of thin films. Quantitative light-induced Fluorescence (QLF) is good to observe the enamel demineralization in vivo. Therefore, the purpose of this study was to investigate preventive effect of fluoride varnish in orthodontic patients using QLF methods and scanning electron microscope(SEM). This study was conducted to test 28 teeth scheduled for premolar extraction(IRB No. S-D20130018). An experimental group of premolars(#14 or #15, #34 or #35) was equipped with an orthodontic band after fluoride varnish applying, while a control group of premolars(#24 or #25, #44 or #45)was just equipped with an orthodontic band. Left side premolars(#24 or #25, #34 or #35) removed after 4 weeks. After remaining premolars(#14 or #15, #44 or #45) had applicated fluoride varnish at 4 weeks and evaluated effect remineralization. Comparing the demineralization amount is measured using QLF and SEM image analyzed the degree of preventive effect. There were significantly different of mineral reduction between before and after the application in the control group. However, the experimental group did not have any significant difference of mineral reduction between before and after the application. The difference between the experimental group and the control group was difference in the mandible than the maxilla. The experimental group applied fluoride varnish had less mineral decrease in demineralizing environment, this could be considered caries-resistant was larger than the control group not applied of fluoride varnish. However, there were no significant difference reapplication effect at 8 weeks. For orthodontic patients, fluoride varnish can prevent demineralization of the orthodontic devices by applying in advance.
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KEYWORD
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Fluoride varnish, Orthodontic patients, QLF, SEM
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