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 0.16 mm for values obtained from MSCT measurements and 0.12 mm for those taken with callipers. For both methods intrarater measurement error differed by a factor of 2 (repeatability; model versus MSCT: 0.07 mm versus 0.12 mm), while interrater deviation did not differ significantly (reproducibility; model versus MSCT: 0.10 mm versus 0.10 mm). 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.
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 0.16 mm for values obtained from MSCT measurements and 0.12 mm for those taken with callipers. For both methods intrarater measurement error differed by a factor of 2 (repeatability; model versus MSCT: 0.07 mm versus 0.12 mm), while interrater deviation did not differ significantly (reproducibility; model versus MSCT: 0.10 mm versus 0.10 mm). 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.
Authors: T M Präger; H G Brochhagen; R Mischkowski; P-G Jost-Brinkmann; R Müller-Hartwich Journal: J Orofac Orthop Date: 2014-08-28 Impact factor: 1.938
Authors: T M Präger; H G Brochhagen; R Mischkowski; P G Jost-Brinkmann; R Müller-Hartwich Journal: J Orofac Orthop Date: 2014-11-26 Impact factor: 1.938
Authors: Andreas Detterbeck; Michael Hofmeister; Elisabeth Hofmann; Daniel Haddad; Daniel Weber; Astrid Hölzing; Simon Zabler; Matthias Schmid; Karl-Heinz Hiller; Peter Jakob; Jens Engel; Jochen Hiller; Ursula Hirschfelder Journal: J Orofac Orthop Date: 2016-04-20 Impact factor: 1.938
Authors: Thomas Michael Präger; Hans Georg Brochhagen; Axel Mußler; Robert Mischkowski; Paul-Georg Jost-Brinkmann; Ralf Müller-Hartwich Journal: J Orofac Orthop Date: 2013-08-25 Impact factor: 1.938