fa Effect of 980-nm diode laser–aided circumferential supracrestal fiberotomy on fluorosed root surfaces ارتودنسی Orthodontics پژوهشي Research <p> <strong>Objective:</strong>   </p><p> To evaluate and compare the root surface morphological changes after 980-nm diode laser–aided circumferential supracrestal fiberotomy (CSF) on fluorosed and non-fluorosed teeth. </p><p> <strong>Materials and Methods:</strong>   </p><p> The sample comprised 27 orthodontic patients (14 males and 13 females mean age  =  17.3 years) with and without fluorosis, from whom 40 fluorosed and 40 non-fluorosed premolar teeth were extracted for orthodontic reasons. Conventional (control group) and laser-aided (experimental group) CSF was performed on fluorosed and non-fluorosed teeth indicated for orthodontic extraction, using a scalpel and a 980-nm diode laser at 2.5 W power, respectively. Subsequently, teeth were extracted, sectioned, and examined by scanning electron microscope to assess the ultrastructural changes.</p><p> <strong> Results:</strong>   </p><p> There were differences in surface morphology among fluorosed and non-fluorosed roots in the control group. The root specimens of both fluorosed and non-fluorosed teeth irradiated by diode laser exhibited no evidence of smear layer, laser-induced pitting or cavitation, linear cuts/markings, carbonization of surface, and heat-induced surface cracking. However, a glazed or slightly melted appearance was observed in root specimens of fluorosed teeth after diode laser irradiation. </p><p> <strong>Conclusions</strong>:   </p><p> These findings suggest that the diode laser–aided CSF procedure is free from thermal hazard on non-fluorosed root surfaces but may provoke some thermal changes on fluorosed root surfaces. </p><hr><p></p><p> <strong>Source: </strong>The Angel Orthodontists</p><p> <a href="http://www.angle.org/doi/abs/10.2319/052212-419.1" target="_blank"><font color="#0000ff">Full Text</font></a></p> Circumferential supracrestal fiberotomy, Diode laser, Fluorosis, Orthodontic, Scanning electron microscopy 0 0 http://idai.ir/browse.php?a_code=A-10-32-1963&slc_lang=fa&sid=1 Kunaal Dhingra kunaaldhingra@yahoo.co.in 10031947532846009216 10031947532846009216 Yes Department of Periodontics, Sri Venkateshwara Dental College, Bangalore, Karnataka, India Kharidhi Laxman Vandana 10031947532846009217 10031947532846009217 No Department of Periodontics, College of Dental Sciences, Davangere, Karnataka, India Polavaram Vasudeva Girish 10031947532846009218 10031947532846009218 No Department of Orthodontics, Sri Venkateshwara Dental College, Bangalore, Karnataka, India Charles Cobb 10031947532846009219 10031947532846009219 No Department of Periodontology, School of Dentistry, University of Missouri, Kansas City, MO