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KMID : 0362320100350050387
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Journal of Korean Academy of Operative Dentistry
2010 Volume.35 No. 5 p.387 ~ p.394
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The evaluation of clinical efficacy and longevity of home bleaching without combined application of In-office bleaching
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Shin Byunk-Gyu
Yang Sung-Eun
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Abstract
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Objectives: The purpose of this study was to evaluate the whitening efficacy and longevity of home bleaching.
Materials and Methods: A total of 28 patients were divided into either experimental group (Opalescence F; 15% carbamide peroxide) or control group randomly. The patients in experimental group were instructed to wear individual trays applied with bleaching gel for 2 hours a day for 4 weeks. Any treatments weren’t applied to the patients in control group. The color measurements of central incisors, lateral incisors & canines of upper and lower arch were recorded at base line, immediately after the finishment of treatmemt (4 weeks), 8 weeks and 12 weeks using Colorimeter (Chroma Meter, 2600d Konica Minolta co.) and Vitapan classical shade guide (Vita Zahnfabrik).
Results: A significantly stronger color change was observed for overall teeth samples in experimental group immediately after treatment (at 4 weeks) compared to ones in control group (p < 0.05). There was also a significant difference between baseline and 8 weeks or 12 weeks separately though color rebouncing phenomenon occurred as time went by (p < 0.05).
Conclusions: The clinical effecacy and longevity of home bleaching without combined application of in-office bleaching was observed through this experiment.
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KEYWORD
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Colorimeter, Home bleaching, Longevity, Vita shade guide, Whitening efficacy
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