fa Distalization pattern of the maxillary arch depending on the number of orthodontic miniscrews ارتودنسی Orthodontics پژوهشي Research <p> <strong>Objective:</strong>   </p><p> To determine the effects of linear force vector(s) from interradicular miniscrews on the distalization pattern of the maxillary arch in adult Class II patients. </p><p> <strong>Materials and Methods:</strong>   </p><p> Twenty-five adult patients with mild to moderate Class II dentition and minimal crowding were collected. Either single (group A, n  =  12) or dual (group B, n  =  13) miniscrews were inserted on the posterior interradicular area to deliver a distalizing force to the main archwire. The displacement patterns of maxillary incisors and molars were measured and compared. </p><p> <strong>Results:</strong>   </p><p> Significant distalization in the molars and incisors was shown in both groups. Significantly greater distalization and intrusion of the first molar and intrusive displacement of the incisor, together with significant reduction of the mandibular plane, were noted in group B, in contrast to the rotation of the occlusal plane in group A. </p><p> <strong>Conclusions:</strong>   </p><p> Interradicular miniscrews predictably induced total arch distalization, leading to the correction of Class II. Additional miniscrews in the premolar area appear to facilitate intrusion and distalization of the entire arch according to the position of the force vectors. </p><hr><p></p><p> <strong>Source: </strong>The Angel Orthodontists</p><p> <a href="http://www.angle.org/doi/abs/10.2319/032212-123.1" target="_blank"><font color="#0000ff">Full Text</font></a></p> Maxillary arch, Class II, Interradicular, Miniscrew, Distalization 0 0 http://idai.ir/browse.php?a_code=A-10-32-1942&slc_lang=fa&sid=1 Till E. Bechtold 10031947532846009116 10031947532846009116 No Department of Orthodontics, Eberhard Karls University, Tübingen, Germany. Visiting Scholar, Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, South Korea Jin-Wook Kim 10031947532846009117 10031947532846009117 No Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, South Korea Tae-Hyun Choi 10031947532846009118 10031947532846009118 No Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, South Korea Young-Chel Park 10031947532846009119 10031947532846009119 No Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, South Korea Kee-Joon Lee orthojn@yuhs.ac 10031947532846009120 10031947532846009120 Yes Department of Orthodontics, Yonsei University. Institute of Craniofacial Deformity, Yonsei University, Seoul, South Korea