caa a22 4500 445347546 CHVBK 20180317142833.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s00056-010-0005-0 doi (NATIONALLICENCE)springer-10.1007/s00056-010-0005-0 Measuring mesiodistal width of impacted maxillary canines [Elektronische Daten] CT-assisted determination [Elisabeth Hofmann, Jürgen Medelnik, Thomas Keller, Stefanie Steinhäuser, Ursula Hirschfelder] Mesio-distale Breite impaktierter oberer Eckzähne CT-gestützte Bestimmung Aim: Precise, three-dimensional localization of impacted maxillary canines is central to their clinical management. Predicting precisely the crown's mesiodistal width is paramount in planning orthodontic treatment. The aim of this study was to verify the exact mesiodistal width of impacted canines via MSCT (multislice spiral computed tomography) examinations. Patients and methods: 3D MSCT images from 17 patients with a total of 24 impacted maxillary canines were taken to obtain the largest mesiodistal diameter using mesial and distal contact points. All existing maxillary canines were included in this study. Mesiodistal tooth width was also determined using callipers on a plaster model after canine eruption. Each measurement was taken twice by 3 observers after a 10-day interval. Statistical analysis entailed calculating and comparing the systematic error, intrarater and interrater standard deviations (Deming regression and ANOVA with random effects). Results: Comparison of the different methods revealed good agreement between the pre-eruption and post-eruption values regarding the canine's mesiodistal width. Total standard deviation was 0.16mm for values obtained from MSCT measurements and 0.12mm for those taken with callipers. For both methods intrarater measurement error differed by a factor of 2 (repeatability; model versus MSCT: 0.07mm versus 0.12mm), while interrater deviation did not differ significantly (reproducibility; model versus MSCT: 0.10mm versus 0.10mm). The reproducibility of our measurements whether taken on the model or with CT was below biological variability. Conclusions: The volumetric data from an MSCT system gives highly accurate information on the mesiodistal width of displaced canines. Urban &amp; Vogel, Muenchen, 2011 Canine teeth nationallicence Orthodontics nationallicence Displacement nationallicence Impacted canines nationallicence Computed tomography nationallicence Multislice spiral computed tomography nationallicence Tooth width nationallicence Mesiodistal diameter of upper canines nationallicence Eckzähne nationallicence Kieferorthopädie nationallicence Verlagerung nationallicence Impaktion nationallicence Computertomographie nationallicence Mehrschicht-Spiral-Computertomographie nationallicence Zahnbreite nationallicence Mesio-distaler Durchmesser oberer Eckzähne nationallicence Hofmann Elisabeth Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut Medelnik Jürgen Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut Keller Thomas ACOMED Statistik, Leipzig, Deutschland aut Steinhäuser Stefanie Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut Hirschfelder Ursula Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie Springer-Verlag 72/1(2011-02-01), 33-44 1434-5293 72:1<33 2011 72 56 https://doi.org/10.1007/s00056-010-0005-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00056-010-0005-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hofmann Elisabeth Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut NATIONALLICENCE 700 1- Medelnik Jürgen Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut NATIONALLICENCE 700 1- Keller Thomas ACOMED Statistik, Leipzig, Deutschland aut NATIONALLICENCE 700 1- Steinhäuser Stefanie Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut NATIONALLICENCE 700 1- Hirschfelder Ursula Zahnklinik 3 - Kieferorthopädie, Universitätsklinikum Erlangen-Nürnberg, Glückstr. 11, 91054, Erlangen, Deutschland aut NATIONALLICENCE 773 0- Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie Springer-Verlag 72/1(2011-02-01), 33-44 1434-5293 72:1<33 2011 72 56 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer