Accuracy of Intraoral Scanner versus Conventional Method for Bolton Ratio Assessment in A Sample of Duhok Population
Abstract
Aims: The study aimed to compare the accuracy and reliability of the measurement of the anterior and overall Bolton ratio between plaster models (by silicone impressions) and intraoral scanner (IOS) images (by TRIOS scanner). Materials and Methods: Fifty-one patients were selected from the Duhok University College of Dentistry - Prevention, Orthodontic & Pedodontics Department auditors. Their ages ranged between 18 and 35 years. Each one underwent a silicone impression of the jaws to obtain the plaster models and IOS digital images to obtain the digital models. Both records formed the two study groups: the plaster model group (PMG) and the IOS group (IOSG). Measurements (the anterior and overall Bolton's ratio) were made on plaster and IOS digital images. The Bolton ratios were re-measured on 5 samples for each group by the same researcher a month after the first measurement to determine the accuracy of the re-measurement, and the inter-examiner intraclass correlation coefficients (ICCs) were applied. A paired T-test was conducted to compare the two groups and to study the reliability of the measurement. Results: When performing the intraclass correlation (ICC), the results showed the reliability of Bolton ratio measurements in the plaster models and IOS digital images (ICC = 0.998, 0.991 respectively). There were no statistically significant differences between the plaster models and IOS groups concerning the anterior Bolton ratio p = 0.999. There were no statistically significant differences between the plaster models and IOS groups concerning the overall Bolton ratio p = 0.971. Conclusions: Plaster models (by silicone impressions) or IOS digital images (by TRIOS scanner) can be used in orthodontic diagnosis to measure the Bolton ratio (anterior and overall) with the same accuracy and reliability.
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