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- Clinical Research The evaluation of clinical efficacy and longevity of home bleaching without combined application of In-office bleaching
- Byunk-Gyu Shin, DDS, MD1, Sung-Eun Yang, DDS, PhD2
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Journal of Korean Academy of Conservative Dentistry 2010;35(5):387-394.
DOI: https://doi.org/10.5395/JKACD.2010.35.5.387
Published online: September 30, 2010
1Department of Prosthodontics, Graduate School of Clinical Dental Science, Catholic University, Seoul, Korea.
2Department of Conservative Dentistry, Seoul St. Mary's Hospital, Catholic University, Seoul, Korea.
- Correspondence to Sung-Eun Yang, DDS, PhD. Professor, Department of Conservative Dentistry, Seoul St. Mary's Hospital, Catholic University, 505, Banpo-dong, Seocho-gu, Seoul, Korea 135-720. Tel, +82-2-2258-6296; Fax, +82-2-537-2374; dentyeun@catholic.ac.kr
• Received: June 17, 2010 • Revised: July 22, 2010 • Accepted: September 8, 2010
Copyright © 2010 Korean Academy of Conservative Dentistry
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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.
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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).
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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).
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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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Figure 1
Change in ΔE* obtained by colorimeter in control group and experimental group.
Figure 2
Change in ΔE* obtained by vita shade guide in control group and experimental group.
Figure 3
Individual tooth ΔE* obtained colorimeter in experimental group.
Figure 4
Individual tooth ΔE* obtained colorimeter in control group.
Figure 5
Individual tooth ΔE* obtained vita shade guide in experimental group.
Figure 6
Individual tooth ΔE* obtained vita shade guide in control group.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
The evaluation of clinical efficacy and longevity of home bleaching without combined application of In-office bleaching
The means values of shade changes measured by colorimeter (p < 0.05)
The means values of shade changes measured by vita shade guide (p < 0.05)
Table 1
The means values of shade changes measured by colorimeter (p < 0.05)
Table 2
The means values of shade changes measured by vita shade guide (p < 0.05)
