In-office bleaching protocols using violet LED: A split mouth case report

Author(s)

de Souza, Bianca Rossi ^[1] ; Neves Lago, Andrea Dias ^[2] ; Ferreira, Leila Soares ^[3] ; Mayer-Santos, Eric ^[4] ; de Freitas, Patricia Moreira ^[4] ; Morimoto, Susana ^[5] ; Ramalho, Karen Muller ^[5]

Affiliation

^[1] Univ Ibirapuera, Av Interlagos 1329, BR-04661100 Sao Paulo, SP - Brazil

^[2] Univ Fed Maranhao, Dept Dent, Av Portugueses 1966, BR-65080805 Sao Luis, Maranhao - Brazil

^[3] Privat Dent Off, Campinas - Brazil

^[4] Univ Sao Paulo, Special Lab Lasers Dent LELO, Dept Restorat Dent, Dent Sch, Av Prof Lineu Prestes, 2227, Cidade Univ, BR-05508000 Sao Paulo, SP - Brazil

^[5] Univ Ibirapuera, Av Interlagos 1329 Chacara Flora, BR-04661100 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Photodiagnosis and Photodynamic Therapy; v. 36, DEC 2021.
• Web of Science Citations: 0

Abstract

A new LED wavelength, violet LED (VL) with a wavelength between 405 - 410 nm was recently introduced to be used for in-office dental bleaching. In comparison to the blue LED system (440 to 485 nm), the shorter wave-length has more energy carried in its photons and also corresponds to the absorption peak of the stained particles, which lead to whitening utilizing a physical process. Considering the need to suggest and develop new protocols with this new technology, this article reports 2 different dental bleaching protocols developed in a split-mouth model using VL. A 25-year-old male patient was submitted to in-office dental bleaching. On the teeth from the left side, the bleaching gel (35% H2O2) was renewed 3 times (every 8 mins), and on the right side, the gel was maintained without renewal during the bleaching session. The irradiation with Violet LED Light (405 nm +/- 10 nm) was performed with the following protocol: 1 min of irradiation with 30 s light off until 8 min of total time. A total of 3 cycles were performed (total time of 24 min). Two bleaching sessions were performed with an in-terval of 7 days between sessions. Based on the results of this split-mouth case report, there was no visible difference in the final color outcome and sensitivity between both bleaching protocols tested. (AU)

• FAPESP's process: 18/16555-5 - Effect of gel renewal during in-office dental bleaching using violet led light as photo-accelerator. a randomized blind clinical trial
• Grantee: Karen Muller Ramalho
• Support Opportunities: Regular Research Grants