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Appl. Sci. 2017, 7(7), 719;

Analysis on the Accuracy of Intraoral Scanners: The Effects of Mandibular Anterior Interdental Space

Graduate School of Clinical Dentistry, Ewha Womans Universiy, Seoul 07985, Korea
Harvard School of Dental Medicine, Harvard University, Boston, MA 02115, USA
Department of Orthodontics, Ewha Womans University, Seoul 07985, Korea
Department of Prosthodontics and Dental Research Institute, Seoul National University Gwanak Dental Hospital, Seoul 08826, Korea
Department of Orthodontics, School of Medicine, Ewha Womans University Mokdong Hospital, 1071 Anyangcheon-ro, Yang Cheon-Gu, Seoul 07985, Korea
Author to whom correspondence should be addressed.
Academic Editors: Francesco Pirotti, Xinlian Liang and Qi Chen
Received: 20 June 2017 / Revised: 7 July 2017 / Accepted: 10 July 2017 / Published: 13 July 2017
(This article belongs to the Special Issue Laser Scanning)
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In this study, we evaluated the effects of mandibular anterior interdental space on the accuracy of intraoral scanners. Four models of mandibular arch with varying distances of anterior interdental space were analyzed; incisors were evenly spaced out between the two canines by 0 mm, 1 mm, 3 mm, and 5 mm. The full arch of each model was scanned 10 times with iTero® and Trios®. The images were superimposed with those from the reference scanner (Sensable S3) and compared using Geomagic Verify. Statistical analysis was conducted using a t-test, paired t-test, and one-way analysis of variance (ANOVA). Differences in the accuracy of images were statistically significant according to both iTero® and Trios®; a greater deviation was noted with increasing anterior interdental space (p < 0.05). Upon dividing the lower arch into five sections, larger deviation was observed with iTero® in the molar area, except in the model with 1 mm space. With Trios®, the largest deviation was observed in the right molar area in all models. The maximum deviations of intermolar width were 0.66 mm and 0.76 mm in iTero® and Trios®, respectively. This comparison suggests that Trios® demonstrates a higher accuracy than iTero® in all models and in all sections of the arch. However, the mean deviations indicate that both iTero® and Trios® are clinically acceptable. View Full-Text
Keywords: intraoral scanner; scanning mandibular arch; interdental space; accuracy intraoral scanner; scanning mandibular arch; interdental space; accuracy

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Chun, J.-H.; Tahk, J.H.; Chun, Y.-S.; Park, J.-M.; Kim, M. Analysis on the Accuracy of Intraoral Scanners: The Effects of Mandibular Anterior Interdental Space. Appl. Sci. 2017, 7, 719.

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