fa Comparative assessment of soft-tissue changes in Class II Division 1 patients following extraction and non-extraction treatment ارتودنسی Orthodontics پژوهشي Research <b> Background</b>: The extraction of teeth for orthodontic purpose has always been a controversial subject in the speciality. The aesthetics impact of the soft-tissue profile might play a key role in deciding on premolar extraction or non-extraction (NE) treatment, particularly in borderline patients. The purpose of this cephalometric study was to examine the soft-tissue treatment effects of Class II Division 1 malocclusion undergoing extraction of all first premolars in comparison with patients undergoing treatment with a NE approach. <div>  <b>Materials and Methods</b>: Hundred post-pubertal female patients of Class II Division 1 malocclusion were selected. Group 1, treated with four first premolar extractions, consisted of 50 female patients with a mean age of 14 years 1 month. Group 2, treated without extractions, consisted of 50 patients with a mean age of 13 years 5 months. Pre-treatment and post-treatment lateral cephalograms of the patients were obtained. The pre-treatment and post-treatment stage comparison and the intergroup comparison of the treatment changes were conducted between extraction and NE groups of Class II malocclusion samples with t tests. The levels of significance tested were P < 0.05 and P < 0.01.</div><div>  <b>Results:</b> The main soft-tissue differences between the groups at the end of treatment were a more retruded lower lip and a more pronounced lower labial sulcus in those patients subjected to extraction. </div><div>  <b>Conclusion</b>: In Class II Division 1 patients, the extraction or NE decision, if based on sound diagnostic criteria, seems to have no systematic detrimental effects on the facial profile.</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/1522" target="_blank"><font color="#0000ff">Full Text</font></a></p> Borderline extraction- NE subjects and standard edgewise mechanics, dentoskeletal changes, extraction- NE subjects and Class II Division 1, soft-tissue profile 0 0 http://idai.ir/browse.php?a_code=A-10-32-3406&slc_lang=fa&sid=1 Sneh Lata Verma drsneh.lata@ rediffmail.com 100319475328460015643 100319475328460015643 Yes Departments of Orthodontics, B.B.D. College of Dental Sciences Vijay Prakash Sharma 100319475328460015644 100319475328460015644 No Chandra Dental College and Hospital, Barabanki Gyan Prakash Singh 100319475328460015645 100319475328460015645 No Department of Orthodontics and Dentofacial Orthopaedics, Chhatrapati Shahu Ji Maharaj Medical University (Earstwhile K.G.M.C.), Lucknow, Uttar Pradesh, India Kiran Sachan 100319475328460015646 100319475328460015646 No Departments of Orthodontics, B.B.D. College of Dental Sciences