Low-level laser therapy equipment needs calibration before clinical use

André Machado de Senna; Rosa Maria Machado-de-sena; Arseni Lázaro Facundes; Patrícia Barros Nepomuceno; Wanilza Sávya Florentino; Ronyere Olegário de Araújo

doi:10.1117/12.2315562

12 April 2018 Low-level laser therapy equipment needs calibration before clinical use

André Machado de Senna, Rosa Maria Machado-de-sena, Arseni Lázaro Facundes, Patrícia Barros Nepomuceno, Wanilza Sávya Florentino, Ronyere Olegário de Araújo

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Proceedings Volume 10582, Laser Florence 2017: Advances in Laser Medicine; 105820D (2018) https://doi.org/10.1117/12.2315562
Event: Laser Florence 2017, 2017, Florence, Italy

Abstract

Many factors can influence the radiant power delivered by the low-level laser therapy (LLLT) equipment, such as its cleaning and condition, as well as the use of plastic films for protecting the laser or even its time of use. Radiant power is an important factor to consider because it affects the amount of energy delivered to the target tissue. The difference between real radiant power (RRP) and nominal radiant power (NRP) may interfere in the expected results, because the delivered energy is different from the desired energy. Purpose: The objective of this study was to compare the NRP with the RRP offered by LLLT devices under clinical conditions of use. Material and Methods: For data collection to this study, 61 LLLT devices used in private and public dental practices in the state of Tocantins, Brazil, were evaluated. Three consecutive power measurements were performed at one-minute intervals and then the average of the measured power was calculated. The RRP was compared to the NRP. Results: The equipment presented NRP from 30 to 500mW while RRP ranged from 17.3 to 107.0mW. Discussion and Conclusion: The mean power measured in clinical conditions of use of the laser equipment was different from the nominal power reported by the manufacturers of the devices (p<0,01). The RRP ranged between 12.92% and 107% of NRP. This fact is worrisome, since one of the most important parameters for the success of the treatment of an injury using LLLT is the energy (power x time) delivered. These findings reinforce the need of calibrating the equipment before each laser application in order to avoid failures in the therapeutic conduct.

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André Machado de Senna, Rosa Maria Machado-de-sena, Arseni Lázaro Facundes, Patrícia Barros Nepomuceno, Wanilza Sávya Florentino, and Ronyere Olegário de Araújo "Low-level laser therapy equipment needs calibration before clinical use", Proc. SPIE 10582, Laser Florence 2017: Advances in Laser Medicine, 105820D (12 April 2018); https://doi.org/10.1117/12.2315562

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KEYWORDS

Laser therapeutics

Calibration

Laser dentistry

Manufacturing

Tissues

Analytical research

Dentistry

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