Abstract
Aim: The objective of this study was to assess the validity, reliability, and reproducibility of dental arch measurements between conventional study models and digital study models. Materials and Methods: The study sample comprised 50 pretreatment diagnostic conventional study models. Six dental arch measurements were assessed. The conventional study model’s measurements were done with digital vernier caliper (Precision, IP54). For three-dimensional (3D) model measurements, scanning of the conventional study models was done with the Maestro 3D dental scanner (Italy). Results: Measurement on conventional study models shows the mean value of the upper arch length was 72.33 and the mean value of the lower arch length was 64.68 for the conventional study model and the mean value of the upper arch length was 72.41 and the mean value of lower arch length was 63.11 for 3D model. There was a statistical difference between the measurements of overjet and overbite obtained between the study model and the 3D model. There was no statistical difference in intermolar width, intercanine width, and arch length of both the arches and curve of spee between conventional study models and 3D models. The Cronbach’s alpha (internal consistency) ranged from 0.81 to 1, intraclass correlation ranged from 0.70 to 0.99, and the concordance correlation coefficient ranged from 0.81–1, respectively, for various arch parameters. Conclusion: Digital study models were accurate, efficient, and easy-to-use alternatives to conventional study models. Hence, dental arch measurements of digital study models were as valid, reliable, and reproducible compared to conventional study models for all arch parameters except nonvalidity was observed for overjet and overbite measurement in the study.
Published Version
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