Assessment of Blue-light hazard from dental curing lights

Iole Pinto, Andrea Bogi, Nicola Stacchini, Ilenia Gedressi

Abstract


Exposure to blue-light can be an occupational health hazard which can result in a retinal photochemical injury to the eye(s) and/or an increased risk of macular degeneration. Dental curing lights produce an intense blue-light to complete the chemical reaction that produces a tooth restoration (filling). The most damaging wavelength for the retina is blue light, near 440 nm, which is within the spectral emission from dental LCUs. Some researches  published  show   that  curing lights may pose a hazard to the equipment operator and other people nearby.

The aim of the study was to assess the risk of ocular damage from 6 types of light curing units (LCUs) in clinical use in Italy and   to characterize  appropriate protective eyewear to be used to eliminate this hazard.

The study demonstrates that high intensity dental curing lights generate exposures that exceed the limits set by the EU  Directive on Artificial Optical Radiation . The 6 LCUs tested  showed potential to cause blue-light ocular damage, with damage potentially occurring after cumulative viewing of only 70 - 200   seconds at the 20-cm distance for LCU. The evidence presented in this paper can be used to develop practical tips to protect workers that operate with LCU, using appropriate blue-light blocking safety glasses.


Keywords


AOR Risk; Blue Light; LCU; Dental curing lights

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References


American Dental Association 2013 Effective Use of Dental Curing Lights: A Guide for the Dental Practitioner, ADA Professional Products Review, Vol. 8, N. 2

Buonocore M, Davila J. 1973. Restoration of fractured anterior teeth with ultraviolet-light-polymerized bonding materials: A new technique. Journal of the American Dental Association.; 86:1349-1354

Coordinamento Tecnico per la sicurezza nei luoghi di lavoro delle Regioni e delle Province autonome: "Decreto Legislativo 81/2008, Titolo VIII, Capo I, II, III, IV e V sulla prevenzione e protezione dai rischi dovuti all’esposizione ad agenti fisici nei luoghi di lavori Indicazioni operative" 2014 http://www.portaleagentifisici.it/DOCUMENTI/

INTERNATIONAL NON-IONIZING RADIATION COMMITTEE ICNIRP (2013). Guidelines On Limits of exposure to incoherent visible and infrared radiation Health Physics 105(1), 74-91

International Organization for Standardization. 2004 Dentistry — Powered polymerization activators -- Part 1: Quartz tungsten halogen lamps. ISO International Standard 10650-1. Geneva, Switzerland.

Labrie D., Moe J., Price R.B.T., Young M.E., Felix C.M. 201. Evaluation of Ocular Hazards from 4 Types of Curing Lights, J. Can. Dent. Assoc., 77:b116

Leggat P. A., Kedjarune U. and Smith D. R. 2007.Occupational Health Problems in Modern Dentistry: A Review, Industrial Health 45, 611–621

Srivastava S. C., Tandon R., Verma K., Goel A. and Bhardwaj M. 2013.Occular Hazards in Orthodontics: An Overview, Asian Journal of Oral Health & Allied Sciences, Vol. 3, N. 1

Siti web

Banca Dati Radiazioni Ottiche Artificiali

http://www.portaleagentifisici.it/fo_ro_artificiali_list_macchinari_avanzata.php?lg=IT&page=0


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