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Influence of light irradiation for in-office tooth whitening: A randomized clinical study
Akimasa Tsujimoto1, Carlos A Jurado2, Mohammed E Sayed3
1Department of Operative Dentistry, University of Iowa College of Dentistry, Iowa City, Iowa, USA, akimasa-tsujimoto@uiowa.edu.
Purpose:
To evaluate the influence of light irradiation on the clinical efficiency of an in-office whitening agent.
Methods:
The in-office whitening agent (Opalescence Boost 35%) was used in this study. Two whitening regimens were evaluated on maxillary anterior teeth: (1) with light irradiation; and (2) without light irradiation. The ΔE*, changes of L*, a*, b*, and the best shade match on the central incisor before, immediately after, and 6 months after whitening procedures were evaluated using a dental spectrophotometer.
Results:
The ΔE and shade had no significant differences with or without light irradiation. In addition, the ΔE, changes of L*, a*, b*, and shade did not change over 6 months after bleaching at a level detectable to the naked eye. The results suggested that the in-office whitening agent using 35% hydrogen peroxide without photocatalysts can improve tooth color with or without light irradiation for 6 months after whitening.
Clinical Significance:
In office whitening using 35% hydrogen peroxide without photocatalysts should be considered as a good treatment option for vital teeth whitening.
