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KMID : 1157520090050020125
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International Journal of Clinical Preventive Dentistry
2009 Volume.5 No. 2 p.125 ~ p.139
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Objectives: The objective of this study is to experiment for compressive strength on the upper anterior teeth influenced by fluoride varnish application, after bleaching
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Lee Jin-Ha
Ahn Sun-Ha
Hwang Sun-Young
Bok Hye-Jung
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Abstract
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Objectives: This research shall compare the effects of each influence of tobacco and coffee, fluoride varnish on
the value, hue and translucency of teeth, after office bleaching.
Methods: We collected 10 extracted maxillary lateral incisors and maxillary central incisors and, subsequently
began office bleaching by using 35% hydrogen peroxide and plasma arc light after having cut the crowns lengthwise to have a total of 20 sections. After office bleaching, tobacco and coffee, fluoride varnish was applied to the sections, where after, comparisons and evaluations were made to observe the changes in value, hue and translucency using ShadescanTM. Also, the results obtained through the test were done through a re-bleaching comparative section in coffee and tobacco wherein the grade of exposure in tobacco and coffee in each single tooth was listed and compared.
Results: After completing office bleaching, the average value increased and both group’s value decreased when
an applied experiment solution consisting of 10 cigarettes and 2 cups of coffee were applied. The tobacco application group decreased the value of bleached teeth more than the coffee’s(p<0.05). When re-bleaching discolored teeth, discolored teeth by the tobacco’s value was lower than the coffee’s(p<0.1). When applying coffee to the bleached teeth, A(orange) line appeared mostly on the teeth and when tobacco was applied, C(yellowish orange gray) line appeared more(p<0.1). When applying coffee after office bleaching, a decrease in the value of fluoride varnish application group was less than that in the application group(p<0.1). When drinking coffee, increase of A(orange) line in the fluoride varnish application group was lower, with a ratio of B(yellow), C(yellowish orange gray), D2, 3(red orange), D4(yellowish orange gray) line was higher than that in the application group(p<0.1). 7 days after applying the experiment solution, translucency of all groups’ of coffee and tobacco, fluoride varnish application and in application was improved generally. But the1 time
application of fluoride varnish we conclude that we did not have a perfect effect than not applying it(p<0.1).
Conclusion: It is known that drinking coffee and smoking interferes in the maintenance of bleached teeth and
when you consider re-bleaching, one should never smoke. Also, after finishing bleaching, applying fluoride varnish prevents discoloring and a decrease in the value of teeth, therefore, we suggest applying fluoride varnish on the teeth because this will have a good, positive effect.
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KEYWORD
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office bleaching, tooth color change, fluoride varnish, value, hue, translucent
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