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

Byunk-Gyu Shin; Sung-Eun Yang

doi:10.5395/JKACD.2010.35.5.387

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

Clinical Research

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2010; 35(5): 387-394.

Published online: 30 September 2010

DOI: https://doi.org/10.5395/JKACD.2010.35.5.387

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

Graduate Student

Professor

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 17 June 2010 Revised 22 July 2010 Accepted 8 September 2010

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.

Keywords: Colorimeter, Home bleaching, Longevity, Vita shade guide, Whitening efficacy

Figures and Tables

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.

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)

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