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HOME > Restor Dent Endod > Volume 34(2); 2009 > Article
Original Article Effect of the bleaching light on whitening efficacy
Jong-Hyun Park1, Hye-Jin Shin2, Deok-Young Park3, Se-Hee Park1, Jin-Woo Kim1, Kyung-Mo Cho1
2009;34(2):-102.
DOI: https://doi.org/10.5395/JKACD.2009.34.2.095
Published online: March 31, 2009

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Corresponding author: Kyung-Mo Cho. Department of Conservative Dentistry, College of Dentistry, Kangnung National University, Jibyun-Dong, Kangnung City, Kangwon-Do, Korea, 210-702. Tel: 82-33-640-3155, Fax: 82-33-640-3103, drbozon@kangnung.ac.kr
• Received: November 10, 2008   • Revised: January 13, 2009   • Accepted: January 15, 2009

Copyright © 2009 The Korean Academy of Conservative Dentistry

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  • The aim of this study was to evaluate the influence of light energy on the tooth whitening effect of bleaching agent in vitro. Extracted human mandibular molars were sectioned to 2 fragments(mesial, distal) and lingual portions of crown were used in this study. All specimens were stained using a red wine for 24 hours and immersed in artificial saliva. Specimens divided into four groups, group 1 and 2 light-activated by LumaCool (LED, LumaLite, Inc., Spring Valley, USA), group 3 and 4 light-activated by FlipoWhite2 (Plasma acr lamp, Lokki, Australia). Group 1 and 3 bleached with LumaWhite(LumaLite, Inc., Spring Valley, USA), group 2 and 4 bleached with Polaoffice(SDI, Victoria, Australia). Bleaching treatment performed during 10 minutes every 24 hours and repeated 6 times. During bleaching treatment , distal fragments was light-activated(L) but mesial fragments was not(NL). Shade assessment employed before and after bleaching treatment using spectrophotometer. The results of the change in shade was compared and analysed between NL and L by using paired-sample T test with 95% level of confidence.
    There were no significant differences between NL and L with a few exceptions. In group 2, a* value more change in L, in group 3, b* value more change in L, in group 4, a* value less change in L. After bleaching, L* value and ΔE increased in all groups and the value of a* and b* decreased in all groups.
    Within the limitation of this test conditions, the results of this study indicate that the light energy has no obvious improving impact on the tooth whitening effect of a bleaching agent.
  • Keywords: Tooth whitening; Bleaching light; Hydrogen peroxide; Spectrophotometer
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Figure 1
Tooth fragment fabrication
jkacd-34-95-g001.jpg
Figure 2
Experiment flow
jkacd-34-95-g002.jpg
Figure 3
Differences of color value before and after tooth bleaching treatment
(Mean shade changes in experimental groups.)
★: significance at the level of p<0.05
jkacd-34-95-g003.jpg
Table 1
List of bleaching light units used in this study
jkacd-34-95-i001.jpg
Table 2
List of bleaching powder used in this study
jkacd-34-95-i002.jpg
Table 3
Experimental groups
jkacd-34-95-i003.jpg
Table 4
One way ANOVA of shade changes

No significant differences between groups by scheffe test.

jkacd-34-95-i004.jpg

Tables & Figures

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    Citations

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    • Development of a Piezoelectric Ultrasonic Tooth-whitening Apparatus
      Young-Jin Lee, Jong-Hoo Paik, Jeong-Bae Lee, Seung-Jae Choi
      Transactions on Electrical and Electronic Materials.2013; 14(5): 268.     CrossRef
    • Clinical assessment of whitening efficacy and safety of in-office tooth whitening system containing 15% hydrogen peroxide with or without light activation
      Young-Suk Noh, Young-Jee Rho, Yeon-Jee Yoo, Hyang-Ok Lee, Sang-Min Lim, Hyun-Jeong Kweon, Yeun Kim, Seong-Yeon Park, Hee-Young Yoon, Jung-Hyun Lee, Chan-Hee Lee, So-Ram Oh, Kee-Yeon Kum
      Journal of Korean Academy of Conservative Dentistry.2011; 36(4): 306.     CrossRef

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      Effect of the bleaching light on whitening efficacy
      J Korean Acad Conserv Dent. 2009;34(2):95-102.   Published online March 31, 2009
      DOI: https://doi.org/10.5395/JKACD.2009.34.2.095
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    Figure
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    Effect of the bleaching light on whitening efficacy
    Image Image Image
    Figure 1 Tooth fragment fabrication
    Figure 2 Experiment flow
    Figure 3 Differences of color value before and after tooth bleaching treatment (Mean shade changes in experimental groups.) ★: significance at the level of p<0.05

    Figure 1

    Figure 2

    Figure 3

    Effect of the bleaching light on whitening efficacy

    List of bleaching light units used in this study

    List of bleaching powder used in this study

    Experimental groups

    One way ANOVA of shade changes

    No significant differences between groups by scheffe test.
    Table 1 List of bleaching light units used in this study

    Table 2 List of bleaching powder used in this study

    Table 3 Experimental groups

    Table 4 One way ANOVA of shade changes

    No significant differences between groups by scheffe test.

    Table 1

    Table 2

    Table 3

    Table 4

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