RESEARCH ARTICLE


Clinical and Spectrophotometric Evaluation of LED and Laser Activated Teeth Bleaching



R. Lo Giudice1, G. Pantaleo2, A. Lizio1, U. Romeo3, G. Castiello2, G. Spagnuolo2, *, G. Lo Giudice1
1 Medical Sciences and Stomatology Department, School of Dentistry, University of Messina, Messina, Italy
2 Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy
3 Department of Oral and Maxillofacial Sciences University Sapienza, Rome, Italy


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© Lo Giudice et al; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Tel/Fax: +390817462080; E-mails: gspagnuo@unina.it, gianrico.spagnuolo@gmail.com


Abstract

Background:

Auxiliary power sources (LED and laser) are used in in-office teeth bleaching techniques to accelerate the redox reaction of the whitening gel to increase ease of use, to improve comfort and safety, and to decrease the procedure time.

Objective:

The aim this study is to evaluate the efficiency of the teeth whitening procedures performed with hydrogen peroxide and carbamide peroxide, LED or Laser activated.

Method:

18 patients, affected by exogenous dyschromia, were treated with a bleaching agent composed by 35% hydrogen peroxide and 10% carbamide peroxide. They were divided into two groups: in the first group the bleaching agent was activated by a LED lamp; in the second group it was activated by a Laser diode lamp. Both groups were subjected to 3 bleaching cycle of 15’ each. The chromatic evaluations were performed before and after one week from the treatment, using a chromatic scale and a spectrophotometer. The mean value of pre, post bleaching and follow-up were analyzed using a T-test, with results statistically significant for P<0,05.

Results:

Results showed that the variations in brightness, chroma and hue are significantly influenced by the interaction between the whitening agent and the original colour of the teeth. Laser-activation has marginally improved the bleaching effectiveness. All patients treated with laser activation complained an increase in dental sensitivity.

Conclusion:

The use of laser-activating systems did not improve the efficacy of bleaching.

Keywords: Anchorage, Bleaching, Carbamide peroxide, Hydrogen peroxide, Laser, LED, Spectrophotometer.