fa Periodontal health of palatally displaced canines treated with open or closed surgical technique: A multicenter, randomized controlled trial ارتودنسی Orthodontics پژوهشي Research <p> <strong>Introduction</strong></p><p>  The aim of this study was to investigate differences in the periodontal outcomes of palatally displaced canines (PDC) exposed with either an open or a closed surgical technique. </p><p> <strong>Methods</strong></p><p>  A multicenter, randomized controlled trial was undertaken in 3 hospitals in the United Kingdom, involving 2 parallel groups. Patients with unilateral PDC were randomly allocated to receive either an open or a closed surgical exposure. Periodontal health was assessed 3 months after removal of fixed appliances. Parameters measured included clinical attachment levels, recession, alveolar bone levels, and clinical crown height. </p><p> <strong>Results</strong></p><p>  Data from 62 participants (closed, 29 open, 33) were analyzed. There was no difference between PDC exposed with an open vs a closed surgical technique (mean difference, 0.1 mm 95% confidence interval [CI], −0.2-0.5). There was, however, a statistical difference in mean attachment loss between the operated and unoperated (contralateral) canines (mean difference, 0.5 mm 96% CI, 0.4-0.7 P <0.001). Twenty of the 62 subjects had some recession on the palatal aspect of the operated canine, whereas only 4 subjects had some visible root surface on the palatal aspect on the unoperated side (P = 0.001). </p><p> <strong>Conclusions</strong></p><p>  There is a periodontal impact when a unilateral PDC is exposed and aligned. This impact is small and unlikely to have clinical relevance in the short term however, the long-term significance is unknown. When the open and closed techniques were compared, no difference in periodontal health was found. </p><hr><p></p><p> <strong>Source: </strong>American Journal of Orthodontics & Dentofacial Orthopedics </p><p> <a href="http://www.ajodo.org/article/S0889-5406(13)00421-6/abstract" target="_blank"><font color="#0000ff">Full Text</font></a></p> 0 0 http://idai.ir/browse.php?a_code=A-10-32-1829&slc_lang=fa&sid=1 Nicola A.Parkin 10031947532846008606 10031947532846008606 No Charles Clifford Dental Hospital, Sheffield, and Barnsley Hospital NHS Foundation Trust, Barnsley, United Kingdom Richard S.Milner 10031947532846008607 10031947532846008607 No Barnsley District General Hospital, Barnsley, and Charles Clifford Dental Hospital, Sheffield, United Kingdom; specialist practitioner, Derby, United Kingdom Chris Deery 10031947532846008608 10031947532846008608 No Academic Unit of Oral Health and Development, School of Clinical Dentistry, University of Sheffield, Sheffield, United Kingdom David Tinsley 10031947532846008609 10031947532846008609 No Sheffield, United Kingdom Anne-Marie Smith 10031947532846008610 10031947532846008610 No Royal Derby Hospitals NHS Foundation Trust, Derby, United Kingdom Peter Germain 10031947532846008611 10031947532846008611 No Newcastle Dental Hospital and Cumberland Infirmary, Carlisle, United Kingdom Jennifer V.Freeman 10031947532846008612 10031947532846008612 No School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom Sarah J.Bell 10031947532846008613 10031947532846008613 No Academic Unit of Oral Health and Development, School of Clinical Dentistry, Claremont Crescent, Sheffield, United Kingdom Philip E.Benson 10031947532846008614 10031947532846008614 Yes Academic Unit of Oral Health and Development, School of Clinical Dentistry, Claremont Crescent, Sheffield, United Kingdom