Efficacy of Er: YAG versus Er, Cr; YSGG In Metal Brackets Debonding

Abstract

Introduction: The principle of safe bracket debonding is to degrade the adhesiveresin strength connecting the tooth and the bracket by softening or ablation.of adhesiveresin from tooth surface without damaging the enamel. Aim: The aim of this studywere to compare the efficacy of erbium yttrium aluminum garnet (Er: YAG) laser andEr Cr;YSGG in debonding on the metal brackets and determination if there are anyadhesive remnants on the enamel surface by the stereomicroscope. Methods: Sixtymetal brackets were bonded to sixty upper first premolars and they were divided intothree groups, Group 1(control) debonded by conventional plier, group 2 debonded byEr: YAG laser and group 3 de bonded by Er Cr: YSGG. The Enamel surface were evaluatedby stereo microscope for any enamel cracks and damage. Results: Er: YAG 7Wlaser debond the metal brackets in a shorter time than Er Cr; YSGG and Erbium ChromiumYttrium Scandium Gallium Garnet (Er Cr: YSGG) laser (6W and 7W) decreasedthe enamel damage compared to the Er :YAG laser and the conventional method forDebonding .Conclusion: The Er Cr; YSGG 7 W laser are clinically safer than othergroups as it has acceptable chair side time in debonding and less damage on the enamel.