fa Distraction osteogenesis for cleft palate closure: A fi nite element analysis ارتودنسی Orthodontics پژوهشي Research <b> Background:</b> Current methods of closure of the cleft palate result in the formation of scars and impairment of growth. Distraction osteogenesis (DO) might be an effective means to repair or at least reduce the size of wide clefts. This study investigates the biomechanical aspects of this process. <div>  <b>Materials and Methods:</b> DO simulation was applied to reduce the size of a unilateral hard palate cleft on a three-dimensional (3D) model of the maxilla. For the position of osteotomy lines, two different models were assumed, with the osteotomy line on the affected side in model A and on the intact side in model B. In each model, DO screws were placed on two different positions, anteriorly (models A1 and B1) and posteriorly (models A2 and B2). Displacement pattern of the bony island in each of the four models, reaction forces at DO locations, and von Mises stress were estimated. Mesh generation and data processing were carried out in the 3D fi nite element analysis package (ABAQUS V6.7-1 Simulia Corp., Providence, RI, USA). </div><div>  <b>Results:</b> In model B2, the island moved almost evenly, assuring a more complete closure of the cleft. The most uniform stress distribution was found in model B1.</div><div><b> Conclusion:</b> The results suggest that the best positions for the DO screw and the osteotomy line for closure of the cleft palate are posteriorly and on the intact side, respectively.</div><hr><p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><b>Source: </b>Dental Research Journal </p> <p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><a href="http://drj.mui.ac.ir/index.php/drj/article/view/1548" target="_blank"><font color="#0000ff">Full Text</font></a></p> Cleft palate, distraction osteogenesis, fi nite element analysis 0 0 http://idai.ir/browse.php?a_code=A-10-32-3432&slc_lang=fa&sid=1 Majid Ghasemianpour 100319475328460015737 100319475328460015737 No Dental Research center, Research Institute of Dental Sciences Sara Ehsani 100319475328460015738 100319475328460015738 No Dental Research center, Research Institute of Dental Sciences Soodeh Tahmasbi tahmasbisoodeh@ gmail.com 100319475328460015739 100319475328460015739 Yes Department of Orthodontics Mohammad Bayat 100319475328460015740 100319475328460015740 No Craniomaxillofacial Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran Maedeh Ghorbanpour 100319475328460015741 100319475328460015741 No Department of Oral & Maxillofacial pathology, Shahid Beheshti University of Medical Sciences Seyed Mohammadreza Safavi 100319475328460015742 100319475328460015742 No Dental Research center, Research Institute of Dental Sciences Fateme Sadat Mirhashemi 100319475328460015743 100319475328460015743 No Department of Agricultural Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran