Open AccessAccuracy of Three-dimensional Cone Beam Computed Tomography Digital Model Measurements Compared with Plaster Study Casts
Author(s) -
Shuaib Al Ali,
Pratik Premjani,
Anas Al-Mulla,
Donald J. Ferguson
Publication year - 2017
Publication title -
apos trends in orthodontics
Language(s) - English
Resource type - Journals
eISSN - 2321-4600
pISSN - 2321-1407
DOI - 10.4103/apos.apos_106_17
Subject(s) - cone beam computed tomography , arch , plaster casts , medicine , dental arch , wilcoxon signed rank test , orthodontics , computed tomography , nuclear medicine , dentistry , radiology , civil engineering , engineering , mann–whitney u test
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