Date of Award
Summer 2022
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Dentistry
First Advisor
Liu, Dawei
Second Advisor
Nimeri, Ghada
Third Advisor
Mehta, Shivam
Abstract
Objective: The objective of this study was to assess the accuracy, validity, and reliability of measurements obtained by MotionView's Ortho Share 360 program compared to traditional manual measurements of 3D printed models using a standardized ABO measuring gauge. In detail, the study aimed to evaluate the difference in total ABO Cast Radiographic-Evaluation (CRE) score and individual differences among six ABO CRE parameters. The null hypothesis is that there are no statistically different scores between digital and manual measurements. Methods: 33 samples were measured based on standardized parameters determined by the ABO. The first measurements were obtained manually using ABO measuring gauge on 3D printed plastic models and the second set of measurements were obtained digitally using Ortho Share 360 program. Intra-examiner reliability was determined with the Spearman test. The model score values for the manual measurements and digital measurements were compared using two-sample T-tests. Pearson analysis was used to test the correlation between manual CRE and digital CRE. A p-value less than 0.05 was considered statistically different. Results: An intra-examiner correlation coefficient (ICC) of 0.99 indicated a good consistency of measurements (p < 0.001). The scores from digital models were significantly (p < 0.001) higher than those obtained from manual measurement, with an average of 5.27 points and a standard deviation of 1.39. This difference was due to statistically significant differences in 3 ABO CRE parameters: alignment (1.79, p < 0.001), marginal ridge (1.18, p < 0.001), and buccolingual inclination (1.15, p < 0.001). Digital CRE was significantly correlated with manual CRE (correlation coefficient = 0.828, p < 0.001). Conclusion: On average, digital scores were 5.27 higher than manual measurements, with a standard deviation of 1.39. The ABO CRE scores from Ortho Share 3D differed significantly statistically and clinically compared to manual measurements and, therefore, cannot fully replace manual measurements. Based on the results, the null hypothesis was rejected. If the digital measurements were to be utilized, the range for a passing score for ABO CRE should be re-evaluated to take into consideration the inflated digital scores.