Evaluation of red light scattering in gingival tissue - in vivo study

Author(s)

Alvarenga, Leticia Heineck ^{[1, 2]} ; Ribeiro, Martha Simoes ^[3] ; Kato, Ilka Tiemy ^[4] ; Nunez, Silvia Cristina ^[5] ; Prates, Renato Araujo ^{[1, 2]}

Affiliation

^[1] Univ Nove Julho UNINOVE, Dept Biophoton, Sao Paulo - Brazil

^[2] Univ Nove Julho UNINOVE, Sch Dent, Sao Paulo - Brazil

^[3] IPEN CNEN SP, Ctr Lasers & Applicat, Sao Paulo - Brazil

^[4] ABC Fed Univ UFABC, Dept Biomed Engn, Sao Bernardo Do Campo, SP - Brazil

^[5] Univ Brasil, Dept Bioengn, Sao Paulo - Brazil

• Document type: Journal article
• Source: Photodiagnosis and Photodynamic Therapy; v. 23, p. 32-34, SEP 2018.
• Web of Science Citations: 1

Abstract

Antimicrobial photodynamic therapy (aPDT) has been used to treat periodontal disease, thus the aim of this study was to investigate red light (lambda = 660 nm) attenuation in gingival tissue. This clinical trial included 30 patients with chronic periodontitis; three incisors from each patient were selected for the experimental procedures. A laser source with a radiant power output of 100 mW was used. Two digital photographs were taken of each selected incisor (in frontal and occlusal position). The images were analyzed in the ImageJ program. The results demonstrated that at a 3 mm distance from the laser probe, there is an attenuation of light intensity of 50%, along frontal and occlusal views. Light attenuation in gingival tissue should be considered when setting optimal parameters for antimicrobial photodynamic therapy or photobiomodulation. (AU)

• FAPESP's process: 16/10269-5 - Evaluation of Parameters of Tissue Dosimetry in Photodynamic Therapy for the Treatment of Periodontal Disease - clinical study
• Grantee: Renato Araujo Prates
• Support Opportunities: Regular Research Grants