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1. When properly performed light curing of resin based restorations produces better physical and chemical properties of the restoration stronger bonds between the restoration and tooth improved colour stability and a higher probability of A successful long term clinical outcome Light curing performed incorrectly can result in premature failure of the restoration and potentially more tooth decay resulting in larger restorations that may require endodontic treatment or other costly procedures Undercuring resin based fillings by curing for an insufficient length of time improperly positioning the light curing unit LCU over the restoration or using the wrong type of LCU is thought to contribute to the higher failure of resin based restorations placed in general dental offices compared to the results from controlled clinical trials Hickel Thomas Hill Neil Jessop Hilde Kopperud Daniel Labrie Hui Lu Lori Moilanen Bernhard M ginger John O Keefe Joe Oxman Frank Pfefferkorn Jeffrey Platt Richard Price Jean Francois Roulet Fred Rueggeberg Janine Schweppe Adrian Shortall Howard Strassler Jeffrey Stansbury Byoung Suh Andreas Utterodt David Watts and Stacy Wyatt To discuss and address these concerns an international symposium on light curing in dentistry was held at Dalhousie University in Halifax on May 29 30 2014 The symposium was attended by 40 key opinion leaders from academia and industry who work2. ed together to develop a Consensus Statement with advice on light curing for practitioners The symposium participants were Bob Angelo Ahmed Abuelyaman Suham Alexander Sibel Antonson Steve Armstrong Oliver Benz Uwe Blunck Ellen Bruzell John Burgess Peter Burtscher Liang Chen Ivo Correa Matt Dailey Colin Deacon Omar El Mowafy Jack Ferracane Christopher Felix Reinhard The support of Benco BISCO BlueLight Analytics DENTSPLY 3M ESPE Gigahertz Optik Henry Schein Heraeus Kulzer lvoclar Vivadent Kerr Patterson Dental SDI and Ultradent is gratefully acknowledged Additional Resources on Oasis Discussions e Buyer Beware Not ALL CURING LIGHTS e PracticAL How To How Do YOU CLEAN YOUR ARE EQUAL LIGHT CURING UNIT oasisdiscussions ca 2014 07 28 lc 3 oasisdiscussions ca 2014 07 03 htcl EFFECTIVE Use oF DENTAL CURING LIGHTS A GUIDE FOR THE DENTAL PRACTITIONER oasisdiscussions ca 2013 11 29 dcl e AN ENLIGHTENING LOOK AT LIGHT SOURCES IN DENTISTRY oasisdiscussions ca 2014 07 17 cl 2 e Further resources on light curing will be posted on Oasis Discussions e 22 cpaAessentials Volume 1 Issue 6 Light Curing Guidelines for Practitioners A Consensus Statement from the 2014 Symposium on Light Curing in Dentistry Dalhousie University Halifax Canada K When selecting a light curing unit LCU e Recognize that all lights are not created equal Use a LCU from a manufac
3. erial has a minimum amount of energy that must be provided at the correct wavelengths to achieve satisfactory results Energy Joules cm output W cm x exposure time seconds However minimum irradiation times are also required e Follow the light exposure times and increment thickness recommended by the resin Precautions manufacturer making allowances if you use another manufacturer s light Increase your curing times for increased distances and darker or opaque shades Select a LCU tip that delivers a uniform light output across the light tip and that covers as much of the restoration as possible Cure each surface independently using overlapping exposures if the light tip is smaller than the restoration Position the light tip as close as possible without touching and parallel to the surface of the resin composite being cured Stabilize and maintain the tip of the LCU over the resin composite throughout the exposure Always use the appropriate blue blocking glasses or a shield to protect your eyes as you watch and control the position of the curing light Avoid conditions that will reduce light delivery to the resin composite e g Holding the light tip several millimetres away Holding the light tip at an angle to the resin surface Dirty or damaged light guide optics Supplementary light exposures should be considered under circumstances that may limit ideal light access such a
4. s shadows from matrix bands intervening tooth structure or from restorative material Beware of potential thermal damage to the pulp and soft tissues when delivering high energy exposures or long exposure times Air cool the tooth when exposing for longer times or when using high output LCUs Never shine the LCU into the eyes and avoid looking at the reflected light except through an appropriate blue blocking filter Testing surface hardness of the resin composite in the tooth using a dental explorer provides NO information about adequacy of curing depth Blanket copyright license is given for this information to be freely used in whole or in part for all derivative works without permission from the copyright holder Volume 1 Issue 6 CDAessentials A gt 2D
5. turer who provides contact information a user manual and service Preferably the LCU should have received a favourable report or certification from a reputable independent 3rd party e Know the key performance parameters of your LCU when new i the light output averaged irradiance over the beam incident area in mW cm and spectral output from the LCU ii whether the beam has a uniform and effective output profile across the light tip and iii the diameter of the light beam e Be cautious when using high above 1 500 to 2 000 mW cm output LCUs that advocate very short e g 1 to 5 seconds exposure times When used for such short times it is critical that the light tip is stabilized over the resin during exposure Although some resin composites are matched to specific high output curing lights high output LCUs may not adequately cure all of today s resin composites to the anticipated depth when used for short exposure times Seek peer reviewed literature validating the efficacy and safety of such lights and materials Before you light cure remember to e Regularly monitor and record the light output over time with the same measurement device and light guide Repair or replace the LCU when it no longer meets the manufacturer s specifications e Inspect and clean the LCU before use to ensure it is on the correct setting in good working order and free of defects and debris e Consider that every resin based mat
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