fulltext - The Journal of Adhesive Dentistry
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1. 5 seconds exposure times When used for such short times it is critical that the light tip is stabilized over the resin during ex posure 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 re viewed literature validating the efficacy and safety of such lights and materials Before you light cure remember to 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 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 Consider that every resin based material has a minimum amount of energy that must be provided at the correct wavelengths to achieve satisfactory results Energy Joules cm2 output W cm2 x exposure time Seconds However minimum ir radiation times are also required These guidelines will be published simultaneously in the following journals J Adhes Dent Dental Materials Operative Dentistry Journal of the Canadian Dental Association 304 Follow the light exposure times and increment thickness recommended by the resin manufac turer making allowances if you use another manu facturer s light Increase your curing times2. for increased distances and darker or opaque shades Select a LCU tip that delivers a uniform light out put 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 con trol the position of the curing light Precautions Avoid conditions that will reduce light delivery to the resin composite e g Holding the light tip several millimeters away Holding the light tip at an angle to the resin Surface Dirty or damaged light guide optics Supplementary light exposures should be consid ered under circumstances that may limit ideal light access such as shadows from matrix bands inter vening tooth structure or from restorative material Beware of thermal damage potential to the pulp and soft tissues when delivering high energy expo sures 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 look ing at the reflected light except through an appro priate blue
3. Light Curing Guidelines for Practitioners A Consensus Statement from the 2014 Symposium on Light Curing in Dentistry Held at Dalhousie University Halifax Canada Dear Readers A two day international symposium on Light Curing in Dentistry was held at Dalhousie University Halifax Can ada on May 29th and 30th 2014 The symposium was attended by over 40 key opinion leaders from academia and industry who worked together to develop following advice to practitioners about light curing The symposium participants were Bob Angelo Anmed 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 Hickel Thomas Hill Neil Jes sop Hilde Kopperud Daniel Labrie Hui Lu Lori Moilanen Bernhard Moginger John O Keefe Joe Oxman Frank Pfef ferkorn Jeffrey Platt Richard Price Jean Francois Rou let Fred Rueggeberg Janine Schweppe Adrian Shortall Howard Strassler Jeffrey Stansbury Byoung Suh Andreas Utterodt David Watts Stacy Wyatt The support and active participation of Benco Bisco BlueLight Analytics DENTSPLY 3M ESPE Gigahertz Optik Henry Schein Heraeus Kulzer lvoclar Vivadent Kerr Patter son Dental SDI and Ultradent is gratefully acknowledged Vol 16 No 4 2014 Over the years we have learned that light curing mat ters and th
4. at there are many pitfalls the dentist may encounter when light curing resins in the tooth Inade quate or inappropriate light curing can so easily result in weaker adhesion to the tooth and compromised physical and chemical properties within the restorative material These undesirable outcomes will likely have a negative influence on the longevity of the restoration you have just placed For the benefit of your patients please read and follow the following guidelines Sincerely yours iL Jean Francois Roulet R Fx Richard Price 303 Guest Editorial LIGHT CURING GUIDELINES FOR PRACTITIONERS A CONSENSUS STATEMENT FROM THE 2014 SYMPOSIUM ON LIGHT CURING IN DENTISTRY HELD AT DALHOUSIE UNIVERSITY HALIFAX CANADA When selecting a light curing unit LCU Recognize that all lights are not created equal Use a LCU from a manufacturer who provides contact information a user manual and service Preferably the LCU should have received a favor able report or certification from a reputable inde pendent 3rd party Know the key performance parameters of your LCU when new i the light output averaged irradiance over the beam incident area in mW cm2 and spectral out put from the LCU ii whether the beam has a uni form and effective output profile across the light tip and iii the diameter of the light beam Be cautious when using high above 1 500 to 2 000 mW cm7 output LCUs that advocate very short eg 1 to
5. blocking filter Testing surface hardness of the resin composite in the tooth using a dental explorer provides NO information about adequacy of curing depth The Journal of Adhesive Dentistry
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