caa a22 4500 445347783 CHVBK 20180317142834.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00056-011-0036-1 doi (NATIONALLICENCE)springer-10.1007/s00056-011-0036-1 Severe external apical root resorption—local cause or genetic predisposition? [Elektronische Daten] [K. Sehr, N.C. Bock, C. Serbesis, M. Hönemann, S. Ruf] Schwergradige apikale Wurzelresorption - lokale Ursache oder genetische Prädisposition? Background: Current data suggest that a large extent of the variation in orthodontic root resorption may be explained by differences in individual genetic predisposition. This would imply, however, a similar root resorption reaction in all teeth. Objective: To determine the incidence and extent of severe external apical root resorptions (SEARR) in maxillary incisors during multibracket (MB) appliance treatment. Patients and methods: Of the whole sample of patients having completed MB treatment at the University of Giessen between 1991 and 2010 (PTotal=3198), all subjects exhibiting severe root resorptions on at least one maxillary incisor were selected. SEARR were defined according to Malmgren et al. [39] (grade-IV RR=resorption >1/3 root length). Evaluation was performed using orthopantomograms from before and after MB treatment. The crown and root length of the affected teeth were measured. The extent of SEARR was assessed taking pretreatment crown length into consideration. Results: SEARR was detected in 16patients. Thus, the incidence of SEARR on maxillary incisors during MB treatment totalled 0.5%. The median of SEARR of the affected incisors was 38.6% of the initial root length (minimum=33.4%, maximum=61.0%). Most subjects exhibited only single affected teeth. Only two subjects (0.06% absolute/12.5% relative) presented four maxillary incisors with SEARR. Conclusions: The incidence of SEARR on maxillary incisors during MB treatment (0.5%) was very low compared to the literature. With only 12.5% of SEARR patients presenting four affected teeth, local rather than systemic/genetic factors seem to have predisposed the present subjects to SEARR. Urban &amp; Vogel, Muenchen, 2011 Apical root resorption nationallicence SEARR nationallicence Incisors nationallicence Tip-Edge® nationallicence Multibracket treatment nationallicence Orthopantomogram nationallicence Apikale Wurzelresorption nationallicence SEARR nationallicence Inzisiven nationallicence Tip-Edge® nationallicence Multibracket-Behandlung nationallicence Orthopantomogramm nationallicence Sehr K. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut Bock N.C. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut Serbesis C. Private Practice, Limburg, Germany aut Hönemann M. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut Ruf S. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie Springer-Verlag 72/4(2011-08-01), 321-331 1434-5293 72:4<321 2011 72 56 https://doi.org/10.1007/s00056-011-0036-1 text/html Onlinezugriff via DOI 1 article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00056-011-0036-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sehr K. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut NATIONALLICENCE 700 1- Bock N.C. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut NATIONALLICENCE 700 1- Serbesis C. Private Practice, Limburg, Germany aut NATIONALLICENCE 700 1- Hönemann M. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut NATIONALLICENCE 700 1- Ruf S. Department of Orthodontics, Medical Center for Dental and Oral Medicine, Justus Liebig University, Schlangenzahl 14, 35392, Giessen, Germany aut NATIONALLICENCE 773 0- Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie Springer-Verlag 72/4(2011-08-01), 321-331 1434-5293 72:4<321 2011 72 56 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer