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Year : 2017  |  Volume : 7  |  Issue : 5  |  Page : 215-218

Accuracy of three-dimensional cone beam computed tomography digital model measurements compared with plaster study casts

1 Orthodontic Practice, MOH, Sharjah, United Arab Emirates
2 Department of Orthodontics, European University College, Dubai, United Arab Emirates

Correspondence Address:
Donald J Ferguson
Dubai Healthcare City, Bldg 27, Block D, Office 302, PO Box 53382, Dubai
United Arab Emirates
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/apos.apos_106_17

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Purpose: The purpose of this study was to assess the accuracy of three-dimensional (3D) cone beam computed tomography (CBCT) study casts by comparing with direct measurements taken from plaster study casts. Materials and Methods: The dental arches of 30 patient subjects were imaged with a Kodak 9300 3D CBCT devise; Anatomodels were created and in vivo 5 imaging software was used to measure 10 dental arch variables which were compared to measurements of plaster study casts. Results: Three of the 10 variables, i.e., overbite, maxillary intermolar width, and arch length, were found significantly smaller (P < 0.05) using the Anatomodels following nonparametric Wilcoxon signed-rank testing. None of the differences found in the study averaged <0.5 mm. Conclusions: 3D CBCT imaging provided clinically acceptable accuracy for dental arch analysis. 3D CBCT imaging tended to underestimate the actual measurement compared to plaster study casts.

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