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Accuracy and reliability of measurements performed using two different software programs on digital models generated using laser and computed tomography plaster model scanners

Korean Journal of Orthodontics 2020년 50권 1호 p.13 ~ 25
 ( Camardella Leonardo T. ) - Universidade Federal Fluminense School of Dentistry Department of Orthodontics

 ( Ongkosuwito Edwin M. ) - Radboud University Medical Center Department of Orthodontics and Craniofacial Biology
 ( Penning E. Willemijn ) - Radboud University Medical Center Department of Orthodontics and Craniofacial Biology
 ( Kuijpers-Jagtman Anne Marie ) - Radboud University Medical Center Department of Orthodontics and Craniofacial Biology
 ( Vilella Oswaldo V. ) - Universidade Federal Fluminense School of Dentistry Department of Orthodontics
 ( Breuning K. Hero ) - Radboud University Medical Center Department of Orthodontics and Craniofacial Biology

Abstract


Objective: The aim of this study was to compare the accuracy and reliability of measurements performed using two different software programs on digital models generated using two types of plaster model scanners (a laser scanner and a computed tomography [CT] scanner).

Methods: Thirty plaster models were scanned with a 3Shape laser scanner and with a Flash CT scanner. Two examiners performed measurements on plaster models by using digital calipers and on digital models by using Ortho Analyzer (3Shape) and Digimodel® (OrthoProof) software programs. Forty-two measurements, including tooth diameter, crown height, overjet, overbite, intercanine and intermolar distances, and sagittal relationship, were obtained.

Results: Statistically significant differences were not found between the plaster and digital model measurements (ANOVA); however, some discrepancies were clinically relevant. Plaster and digital model measurements made using the two scanning methods showed high intraclass coefficient correlation values and acceptable 95% limits of agreement in the Bland-Altman analysis. The software used did not influence the accuracy of measurements.

Conclusions: Digital models generated from plaster casts by using laser and CT scanning and measured using two different software programs are accurate, and the measurements are reliable. Therefore, both fabrication methods and software could be used interchangeably.

키워드

Three-dimensional scanner; Digital models; Computed tomography; Three-dimensional diagnosis and treatment planning
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