A clinical evaluation of a bleaching strip containing 2.9% hydrogen peroxide

Article information

Restor Dent Endod. 2006;31(4):269-281

Publication date (electronic) : 2006 July 31

doi : https://doi.org/10.5395/JKACD.2006.31.4.269

Eun-Sook Park ¹, So-Rae Seong ¹, Seong-Tae Hong ¹, Ji-Eun Kim ¹, So-Young Lee ¹, Soo-Youn Hwang ¹, Shin-Jae Lee ²^,⁴, Bo-Hyoung Jin ³^,⁴, Ho-Hyun Son ¹^,⁴, Byeong-Hoon Cho ¹^,⁴

¹Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea.

²Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Korea.

³Department of Preventive Dentistry, School of Dentistry, Seoul National University, Seoul, Korea.

⁴Dental Research Institute, Seoul National University, Seoul, Korea.

Corresponding Author: Byeong-Hoon Cho. Dept. of Conservative Dentistry, School of Dentistry, and Dental Research Institute, Seoul National University, 28-2 Yeongun-dong, Chongro-gu, Seoul, Korea 110-749. Tel: +82-2-2072-3514, Fax: +82-2-764-3514, chobh@snu.ac.kr

Received 2006 January 26; Revised 2006 February 28; Accepted 2006 March 03.

Abstract

This study evaluated the effectiveness and safety of an experimental bleaching strip (Medison dental whitening strip, Samsung medical Co., Anyang, Korea) containing 2.9% hydrogen peroxide. Twenty-three volunteers used the bleaching strips for one and a half hour daily for 2 weeks. As control group, the same strips in which hydrogen peroxide was not included were used by 24 volunteers with the same protocol. The shade change (ΔE*, color difference) of twelve anterior teeth was measured using Shade Vision (X-Rite Inc., S.W. Grandville, MI, USA), Chroma Meter (Minolta Co., Ltd. Osaka, Japan) and Vitapan classical shade guide (Vita Zahnfabrik, Germany). The shade change of overall teeth in the experimental group was significantly greater than that in the control group (p < 0.05) and was easily perceivable. The change resulted from the increase of lightness (CIE L* value) and the decrease of redness (CIE a* value) and yellowness (CIE b* value). The shade change of individual tooth was greatest in canine, and smallest in central incisor. The safety of the bleaching strip was also confirmed.

Keywords: Bleaching strip; Safety; Effectiveness; Hydrogen peroxide; Clinical study

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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Figure 1

Differences in ΔE^* between control group and experimental group obtained using Shade Vision (SV), Chroma Meter CR 321 (CR) and Vitapan shade guide (VP).

Figure 2

Shade changes by the bleaching procedure in overall means of L^*, a^*, and b^* measured using Chroma Meter CR 321.

Figure 3

Shade changes by the bleaching procedure in overall means of L^*, a^*, and b^* measured using Shade Vision.

Figure 4

Shade changes by the bleaching procedure in overall means of L^*, a^*, and b^* measured using Vitapan classical shade guide.

Table 1

CIE Lab^* values^§ of each shade tab coded in the Vita classical shade guide and their ordinal values converted by the descending-ordered brightness sequence

^§O'Brien WJ, Groh CL, Boenke KM9). A new, small-color-difference equation for dental shades. J Dent Res 69:1762-1764, 1990.

Table 2

Age and gender of the participants in the study

Table 3

Shade Vision: color measurements, color changes and their statistical results

Abbreviations; tx: treatment, R: correlation coefficient between the measrements before treatment and the changes after treatment, SD: standard deviation, D: mean differences, NS: not significant

^*, ^**, and ^*** mean p < 0.05, p < 0.01, and p < 0.001, respectively.

Sample numbers of overall measurements: Control, n = 288; Experimental, n = 276)

Sample numbers of each tooth measurements: Control, n = 24; Experimental, n = 23)

Table 4

Chroma Meter CR 321: color measurements, color changes and their statistical results

Abbreviations; tx: treatment, R: correlation coefficient between the measrements before treatment and the changes after treatment, SD: standard deviation, D: mean differences, NS: not significant

^*, ^**, and ^*** mean p < 0.05, p < 0.01, and p < 0.001, respectively.

Sample numbers of overall measurements: Control, n = 288; Experimental, n = 276)

Sample numbers of each tooth measurements: Control, n = 24; Experimental, n = 23)

Table 5

Vitapan classical shade guide: color measurements, color changes and their statistical results

Abbreviations; tx: treatment, R: correlation coefficient between the measrements before treatment and the changes after treatment, SD: standard deviation, D: mean differences, NS: not significant

^*, ^**, and ^*** mean p < 0.05, p < 0.01, and p < 0.001, respectively.

Sample numbers of overall measurements: Control, n = 288; Experimental, n = 276)

Sample numbers of each tooth measurements: Control, n = 24; Experimental, n = 23)

Table 6

Gingival inflammation index, Plaque index, and change in Electric pulp test scores before and after bleaching with experimental and control strips

Table 7

Initial ordinal shade values^§ of the experimental and control groups measured using Shade Vision and Vitapan classical shade guide and their changes after bleaching study

^§The shade code of each tab in Vita classical shade guide were converted to ordinal values by the descending-ordered brightness sequence.