ACCURACY OF 3D CBCT PRINTED MODELS
Ferraro, Joshua M. The Ohio State University
Falter, Jacob The Ohio State University
Lee, Sanghee The Ohio State University
Watanabe, Keiichiro Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Wu, Tai-Hsien The Ohio State University
Kim, Do-Gyoon The Ohio State University
Ko, Ching-Chang The Ohio State University
Tanaka, Eiji Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Deguchi, Toru The Ohio State University
3D printed model
Objectives: To determine the accuracy of three-dimensional (3D) printed models fabricated from cone-beam computed tomography (CBCT) scans of human mandibular dry skulls in comparison with models derived from intraoral scanner (IOS) data.
Materials and Methods: Six human mandibular dry skulls were scanned by IOS and CBCT. Digital models (DMs) constructed from the IOS and CBCT data were fabricated physically using a 3D printer. The width and thickness of individual teeth and intercanine and molar widths were measured using a digital caliper. The accuracy of the DMs was compared between IOS and CBCT. Paired t-tests were used for intergroup comparisons.
Results: All intraclass correlation coefficient values for the three measurements (mesial-distal, buccal-lingual, width) exceeded 0.9. For the mandibular teeth, there were significant discrepancies in model accuracy between the IOS (average discrepancies of 0.18 ± 0.08 mm and 0.16 ± 0.12 mm for width and thickness, respectively) and CBCT (0.28 ± 0.07 mm for width, 0.37 ± 0.2 mm for thickness; P < .01). Intercanine (P = .38) and molar widths (P = .41) showed no significant difference between groups.
Conclusions: There was a statistically significant difference in the accuracy of DMs obtained from CBCT and IOS; however, this did not seem to result in any important clinical difference. CBCT could be routinely used as an orthodontic diagnostic tool and for appliance construction.
The Angle Orthodontist
The EH Angle Education and Research Foundation
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