en تخصصي Special مقالات اصيل Original Article <span style="font-family:Times New Roman;"><span style="font-size:11pt"><span style="line-height:150%"><span calibri=""><b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">Background</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">: The aim of this study was to compare the </span></span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">dento-skeletal stability between one and three-screw fixation of mandible following bilateral sagittal split osteotomy (BSSO) in skeletal class 3 patients</span></span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">.</span></span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:150%"><span calibri=""><b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">Methods</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">: Healthy patients with skeletal class 3 malocclusion in </span></span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond=""><span style="color:#0e101a">Mashhad, Iran, </span></span></span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">from August 2020 to May 2021 were undergone mandibular setback through bilateral sagittal split osteotomy. Rigid fixation was performed in one group with one-screw technique, and three-screw fixation was done in another group. Cephalogram x-rays were prepared and analyzed in three stages: before surgery (T0), one week after the surgery (T1), and six months postoperatively (T2). The linear and angular alterations of chosen multivariate skeletal and dental variables were evaluated and statistically compared in all three periods.</span></span></span> <span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:"Garamond",serif"></span></span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:150%"><span calibri=""><b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">Results</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">: This study included a total of 20 patients, 12 of them were female (60%). Patients in the one-screw fixation group had a mean age of 20.6</span></span></span> <span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">&plusmn; 2.2 years old, whereas those in the three-screw fixation group were 21.5 &plusmn;</span></span></span> <span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">2.8 years old, with no statistically significant difference. Both groups had excellent mandibular stability six months following surgery. No statistically significant differences were observed in the postoperative skeletal and dental changes between the two techniques.</span></span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:150%"><span calibri=""><b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">Conclusion</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:150%"><span garamond="">: Fixation of the mandible following the setback surgery by the BSSO technique with the one-screw fixation method may be accomplished effectively, and the therapeutic outcomes are comparable to those obtained with the traditional 3-screw fixation approach.</span></span></span></span></span></span><br> &nbsp;</span> Skeletal Class 3, Bilateral sagittal split surgery, Fixation. 46 56 http://wjps.ir/browse.php?a_code=A-10-551-3&slc_lang=en&sid=1 Majid Eshghpour 100319475328460012880 100319475328460012880 No Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran Sahand Samieirad 100319475328460012881 100319475328460012881 No Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran Farzaneh MohammadZadeh Mahrokh 100319475328460012882 100319475328460012882 No Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran Samine Mozaffar 100319475328460012883 100319475328460012883 No . Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran Haleh Hashemzadeh h-hashemzadeh@razi.tums.ac.ir 100319475328460012884 100319475328460012884 Yes Department of Orthodontics, School Of Dentistry, Tehran University of Medical Sciences