Accuracy of a computed tomography scanning procedure to manufacture digital models.

Autor: Darroudi AM; Department of Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, The Netherlands., Kuijpers-Jagtman AM; Department of Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, The Netherlands. Electronic address: orthodontie@radboudumc.nl., Ongkosuwito EM; Department of Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, The Netherlands., Suttorp CM; Department of Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, The Netherlands., Bronkhorst EM; Department of Dentistry, Radboud University Medical Center, Nijmegen, The Netherlands., Breuning KH; Department of Dentistry, Radboud University Medical Center, Nijmegen, The Netherlands.
Jazyk: angličtina
Zdroj: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics [Am J Orthod Dentofacial Orthop] 2017 May; Vol. 151 (5), pp. 995-1003.
DOI: 10.1016/j.ajodo.2016.12.013
Abstrakt: Introduction: Accurate articulation of the digital dental casts is crucial in orthodontic diagnosis and treatment planning. We aimed to determine the accuracy of manufacturing digital dental casts from computed tomography scanning of plaster casts regarding linear dimensions and interarch relationships and to test whether eventual differences in interarch relationships between plaster and digital casts would affect orthodontic diagnostics.
Methods: Plaster casts with the wax bites of 2 patients were used to create digital dental casts with a computed tomography scanner. This was repeated 4 times with a 1-week interval. Linear distances were measured on plaster and digital models twice by 2 observers. Next, the 4 digital models of each patient were scored twice by 5 observers for interarch variables.
Results: Digital vs plaster measurements showed high Pearson correlation coefficients (>0.954), whereas the mean difference was small (<0.1 mm) and not significant. The interarch scorings, however, showed significant differences for all variables, except overjet for model 1.
Conclusions: We found substantial interarch inaccuracies of the digital models. These inaccuracies are probably due to a lack of built-in "collision control" in the software and manual articulation of the digital models by a human operator.
(Copyright © 2017 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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