J Korean Acad Conserv Dent.  2010 Sep;35(5):387-394. 10.5395/JKACD.2010.35.5.387.

The evaluation of clinical efficacy and longevity of home bleaching without combined application of In-office bleaching

• Shin BG
• Yang SE

• KMID: 2176438
• DOI: http://doi.org/10.5395/JKACD.2010.35.5.387

Abstract

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.

Keyword

Colorimeter; Home bleaching; Longevity; Vita shade guide; Whitening efficacy

MeSH Terms

Humans
Incisor
Longevity
Tooth
Urea
Urea

Figure

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  Figure 1 Change in ΔE* obtained by colorimeter in control group and experimental group.

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  Figure 2 Change in ΔE* obtained by vita shade guide in control group and experimental group.

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  Figure 3 Individual tooth ΔE* obtained colorimeter in experimental group.

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  Figure 4 Individual tooth ΔE* obtained colorimeter in control group.

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  Figure 5 Individual tooth ΔE* obtained vita shade guide in experimental group.

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  Figure 6 Individual tooth ΔE* obtained vita shade guide in control group.

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