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The influence of the vital bleaching agents on translucency of the bovine enamel
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Original Article The influence of the vital bleaching agents on translucency of the bovine enamel
Dong-Jun Kim1,2, Young-Ju Kim1,2, Hak-Geun Kim1,2, Eun-Jong Park1, Eun-Ju Seo1,3, Yun-Chan Hwang2, Won-Mann Oh2, In-Nam Hwang2
Journal of Korean Academy of Conservative Dentistry 2005;30(3):178-183.
DOI: https://doi.org/10.5395/JKACD.2005.30.3.178
Published online: May 31, 2005

1College of Dentistry, DSRI, Chonnam National University, Korea.

2Department of Conservative Dentistry, DSRI, Chonnam National University, Korea.

3Department of Periodontology, DSRI, Chonnam National University, Korea.

Corresponding author: In-Nam Hwang. Department of Conservative Dentistry, College of Dentistry, Chonnam National University, 8 Hak-dong, Dong-gu, Gwangju, Korea, 501-757. Tel: 82-62-220-4443, Fax: 82-62-225-8387, hinso@jnu.ac.kr
• Received: September 6, 2004   • Revised: November 18, 2004   • Accepted: November 23, 2004

Copyright © 2005 Korean Academy of Conservative Dentistry

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  • This study was done to evaluate whether vital bleaching agents could influence on the translucency of the bovine enamel. The anterior bovine teeth that were extracted one day before and without any gross discoloration were obtained and then were preserved in physiologic saline. 6 mm cylindrical tooth specimens were fabricated with diamond puncher perpendicularly on labial surface of bovine tooth. After embedded in transparent acrylic resin with labial surface being exposed, they were cut to a thickness of 1.2 mm with low speed diamond saw (Isomat, Buehler Co., Lake Bluff, IL, USA). They were smoothly ground to 1 mm thickness of enamel with sandpaper. 24 specimens were randomly divided into 3 groups and control group respectively. Opalescence (10% carbamide peroxide, Ultradent, South Jordan, USA), Rembrandt (10% carbamide peroxide, DenMat, USA) and Opalescence F (15% carbamide peroxide with fluoride, Ultradent, USA) were applied on labial sides of the bovine enamel for 7 days (bleaching agents were reapplied every 24 hours) and the opposite surface was contacted to cotton that soaked in distilled water. The control group was soaked in distilled water. Three stimulus value X, Y and Z were evaluated with colorimeter (Color & Color Differencemeter, Model TC-6FX, Tokyo Denshoku Co., Japan) on the labial surface of all specimen three times on white and black background plate before the bleaching agents were applied and on 3rd, 5th and 7th day after applied. The degree of translucency was normally assessed by measuring the inverse property, opacity (contrast ratio).
    10% Opalescence, 15% Opalescence-F, and control group showed no significant variation in the translucency of bovine enamel, However Rembrandt decreased the translucency of it (p < 0.01).
  • Keywords: Color of bovine enamel; Enamel translucency; Contrast ratio; Vital bleaching
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Figure 1
Change of contrast ratio in bovine teeth.
jkacd-30-178-g001.jpg
Figure 2
Change of L*value in bovine teeth.
jkacd-30-178-g002.jpg
Figure 3
Change of a*value in bovine teeth.
jkacd-30-178-g003.jpg
Figure 4
Change of b*value in bovine teeth.
jkacd-30-178-g004.jpg
Table 1
Materials used in the study
jkacd-30-178-i001.jpg

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        The influence of the vital bleaching agents on translucency of the bovine enamel
        J Korean Acad Conserv Dent. 2005;30(3):178-183.   Published online May 31, 2005
        DOI: https://doi.org/10.5395/JKACD.2005.30.3.178
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      The influence of the vital bleaching agents on translucency of the bovine enamel
      Image Image Image Image
      Figure 1 Change of contrast ratio in bovine teeth.
      Figure 2 Change of L*value in bovine teeth.
      Figure 3 Change of a*value in bovine teeth.
      Figure 4 Change of b*value in bovine teeth.

      Figure 1

      Figure 2

      Figure 3

      Figure 4

      The influence of the vital bleaching agents on translucency of the bovine enamel

      Materials used in the study
      Table 1 Materials used in the study

      Table 1

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