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KMID : 1157520100060010007
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International Journal of Clinical Preventive Dentistry
2010 Volume.6 No. 1 p.7 ~ p.14
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Effects of Tooth Whitening and Topical Fluoride Application on Shade and Translucency Changes in Tooth with Early Caries Lesion
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Riew Hyun
Kim Jung-Sook
Lee Myung-Gu
Kim Yong-Sung
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Abstract
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Objective: The purpose of this study was to evaluate shade and translucency change by means of various topical fluoride application after tooth whitening on teeth with artificial caries lesions.
Materials and method: 84 extracted anterior teeth were selected and induced to artificial caries by 0.1 M lactic acid-sodium hydroxide buffer solution, then tooth whitening treatment were performed for 2 weeks. Topical fluoride application was sequentially applied for 4 times. Improvement of shade and translucency were checked by Shadescan and evaluated according to types of whitening agents, topical fluoride agents and application methods.
Results: By application of tooth whitening agent, translucency seemed to be increased in all groups (p<0.05), but after 2 weeks, there was no significant difference within group and also between group comparisons (p>0.05). Except of 22% carbamide peroxide gel application group, value difference ratio was decreased significantly and value difference between the lesion and normal tooth area seemed to be increased (p<0.05). At the beginning of fluoride application, translucency was improved significantly in 0.1% sodium fluoride strip group and fluoride varnish application groups (p<0.05) ; at 4 weeks, all groups showed the significantly increased translucency (p<0.05). There was no significant difference between groups comparisons (p>0.05). Control group and 2% sodium fluoride strip application group showed constant increasing of value difference ratio between the lesion and normal tooth area (p＜0.05) ; 0.1% sodium fluoride strip group seemed to be steady state ; fluoride varnish group showed continuous recovery of value difference ratio (p＜0.05).
Conclusion: It seemed that demineralized area of tooth with early caries was remineralized without any treatment, in addtion fluoride application could make it possible to accelerate recovery of tooth shade and translucency. Clinically in case of patient showed incipient caries in their anterior teeth, just applying whitening agent had any alternative plan could make additional inconsistency and demineralization. It was suggested that fluoride application after whitening to such patients could make more desirable improvement of shade and advanced remineralization.
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KEYWORD
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tooth whitening, fluoride, shadescan, translucency
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