fa A comparison of shear bond strengths of metal and ceramic brackets using conventional acid etching technique and Er:YAG laser etching ارتودنسی Orthodontics پژوهشي Research <b> Background and aims.</b> The aim of this study was to compare shear bond strength (SBS) of metal and ceramic brackets bonded to enamel using acid versus Er:YAG laser etching. <div><b>Materials and methods</b>. Eighty premolars were divided into 4 groups: AM (acid etching/ metal brackets), AC (acid etching/ ceramic brackets), LM (laser etching/ metal brackets) and LC (laser etching/ ceramic brackets). Enamel conditioning was done using acid in AC and AM and Er:YAG laser in LC and LM. Brackets were debonded with a Dartec machine and the SBSs were determined. Adhesive remnant index was evaluated under a stereomicroscope. Two additional teeth were conditioned with acid and laser for scanning electron microscopy examination. Comparisons of SBS value were done by ANOVA test. </div><div><b>Results.</b> statistical analyses showed that SBSs of acid groups were significantly higher than that of laser groups, but differences between SBS values of AC/ AM and LC/LM were not significant. SEM examination revealed different etching pattern. </div><div><b>Conclusion</b>. Low power Er:YAG laser etching offers clinically acceptable SBS which besides its other superiorities to acid etching can be an appropriate alternative for bonding of ceramic brackets.</div><hr><p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><b>Source: </b>Journal of Dental Research, Dental Clinics, Dental Prospects </p> <p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><a href="http://dentistry.tbzmed.ac.ir/joddd/index.php/joddd/article/view/545" target="_blank"><font color="#0000ff">Full Text</font></a></p> Er: YAG laser, laser, etching, ceramic bracket, metal bracket. 0 0 http://idai.ir/browse.php?a_code=A-10-32-3262&slc_lang=fa&sid=1 Sogra Yassaei 100319475328460015015 100319475328460015015 No Department of Orthodontics, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Reza Fekrazad 100319475328460015016 100319475328460015016 No Department of Dentistry, - Laser Research Center, Tehran University of Medical Sciences, Tehran, Iran Neda Shahraki 100319475328460015017 100319475328460015017 No Department of Orthodontics, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran Mahdjoubeh Goldani Moghadam mahdjoube.gm@gmail.com 100319475328460015018 100319475328460015018 Yes Dental research center, Faculty of Dentistry, Birjand University of Medical Sciences, Birjand, Iran