D e n ti s t r y ISSN: 2161-1122 Dentistry Panhoca et al., Dentistry 2017, 7:11 DOI: 10.4172/2161-1122.1000459 Open Access Case Report Voume 7 • Issue 11 • 1000459 Dentistry, an open access journal ISSN: 2161-1122 *Corresponding author: Vitor Hugo Panhoca, São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, SP, Brazil, Tel: 0049613142111; E-mail: vhpanhoca@ifsc.usp.br Received August 23, 2017; Accepted September 28, 2017; Published October 05, 2017 Citation: Panhoca VH, Oliveira BPde, Rastelli ANS, Bagnato VS (2017) Dental Bleaching Using Violet Light Alone: Clinical Case Report. Dentistry 7: 459. doi:10.4172/2161-1122.1000459 Copyright: © 2017 Panhoca VH, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. bleaching treatment, a 27-year-old male patient was treated in-ofce at the Biophotonics Laboratory at the Institute of Physics São Carlos (IFSC in Portuguese) at the University of São Paulo (USP). A radiographic examination was performed and normal and complete rhizogenesis of 11 and 21 was found. Te patient was advised to receive in-ofce dental bleaching using a device with LED emitting violet light (BrightMax Whitening System-BMW, MMoptics, São Carlos, SP, Brazil) without using peroxide-containing bleaching gel. Figure 1 shows the wavelength of violet light used, whose maximum emission peak is 408 ± 10 nm. Te device emitting violet light had an estimated total power of 1400 mW and surface contact irradiance of 165 mW/cm². To document the results, a photograph of the clinical case was taken before and afer so that they could be compared. All clinical procedures were performed using a lip retractor. Te initial color of the upper and lower teeth was obtained immediately afer prophylaxis using a Keywords: Dental bleaching; Violet light; Colorimetric Introduction Te frst reports of dental bleaching appeared in 1872 when oxalic acid was used. Afer this, other publications and patents on this subject could be found [1,2]. However, it was the 1991 publication by Haywood & Heymann which used 10% carbamide peroxide that popularized the home dental bleaching technique in living teeth [3]. Since then, various techniques using peroxide-containing gel for home use or in- ofce have been developed to improve this procedure and seek a better result in obtaining more efcient dental bleaching, absence of dentin hypersensitivity and greater color stability afer treatment. Bleaching is a clinical procedure that provides better dental and overall facial aesthetics to patients who go to the dentist's ofce frequently. Currently, this treatment uses carbamide peroxide or hydrogen peroxide for applications at home or in-ofce, usually or even by combining these two techniques In-ofce procedures can be carried out using blue light (450 nm) combined with peroxides in order to obtain whitening faster and this is a widely used technique [4]. Recently, a new device using violet wavelengths (approximately 410 nm) has been developed. Te results of the bleaching shown are better than the traditional protocol [5]. Te main characteristics of this new technique were the observation of bleaching without gel (such as peroxides) and the absence of dentin hypersensitivity in treated patients. Violet light has more energy carried in its photons and is more absorbed on the dental surface due to its physical characteristics. Reports from the literature justify that these physical violet light characteristics are responsible for larger surface absorption of light and breaking the pigments (bleaching) that stain teeth without needing to use hydrogen peroxide containing a high concentration of whitening agent gels [5-7]. In addition, using violet light in a fractional way, as presented in this communication, prevents heating of the tooth structure [8]. Terefore, in the technique recommended using violet light in a fractional manner and without using a peroxide-containing gel, efcient dental bleaching without producing dentin hypersensitivity can be achieved [7,8]. Te combination of home and in-ofce bleaching techniques is advocated in the literature because they show greater color stability to treated teeth [9]. Tus, in an attempt to obtain greater color stability afer bleaching using violet light without gel, we present a clinical case treated using violet light and then mineral oil. Te color stability was evaluated aferwards. Clinical Case Afer signing an informed consent form agreeing to dental Dental Bleaching Using Violet Light Alone: Clinical Case Report Vitor Hugo Panhoca 1* , Bruno Pereira de Oliveira 1 , Alessandra Nara Souza Rastelli 2 and Vanderlei Salvador Bagnato 1 1 São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, SP, Brazil 2 Department of Restaurative Dentistry, Universidade Estadual Paulista, Humaitá St 1680, Araraquara, SP, Brazil Abstract In dental offces, one of the most frequent activities is dental bleaching. The evolution of protocols and the possibility of combining the use of light with chemical products can be found in the literature. Some articles only describe using light with a whitening agent. This is a topic of great interest and this article shows a clinical case report using violet light applications. The fnal results were evaluated over 2 months to assess color stability and verify that they do not show great variation. Figure 1: Violet LED emission spectrum.