The Micro-hardness Changes by Use of Fluoride Dental Floss Silk
윤성혁, 이규환, 조자원,
소속 상세정보
윤성혁 ( Yoon Sung-Hyuk ) - Dankook University Graduate School Department of Oral Health
이규환 ( Lee Kyu-Hwan ) - Seoul National University Bundang Hospital Department of Health Promotion Center
조자원 ( Cho Ja-Won ) - Dankook University College of Dentistry Department of Preventive Dentistry
KMID : 1157520130090020065
Abstract
Objective: In recent years, dental floss silk coated with Sodium Fluoride was developed and produced. The purpose of this study was to compare the micro-hardness on the enamel, dentin and cementum at proximal site through the measure of Vickers micro hardness tester.
Methods: Eight extracted teeth were used after sectioned longitudinally 7 teeth as 84 samples separating from enamel, dentin and cementum at each tooth in 42 experimental and the same numbers of the control group were used for micro-hardness test, and 1 teeth were used for Stereo microscope observations.
Results: The dental floss silk was applied as fluoride contained in experimental group, and non fluoride in control group, for 5,000 times, by use of automatic flossing machine with 150 g weight for all samples as enamel, dentin and cementum, both in experimental and the control, with water spray. Every 100 times movements and 5 % of Acetic acid were applied for 2 hours for all samples. Micro-hardness was measured with 500 g weight for 15 seconds press and VHN was calculated and Stereo microscope was used for observation of the surface roughness and compared.
Conclusion: The micro-hardness was higher in experimental group than in control, (p<0.05, by paired t-test) and the surface roughness were more in control groups at enamel, dentin and cementum, than in experimental group, in stereo-microscopic observations. So, it was estimated that, to use the fluoride contained floss silk might be effective for proximal caries prevention in clinical.
키워드
dental floss silk; fluoride; micro-hardness
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