Three-dimensional analysis of aligner gaps and thickness distributions using advanced laboratory-based hard x-ray tomography

Remi Ammann; Christine Tanner; Georg Schulz; Bekim Osmani; Prasad Nalabothu; Tino Töpper; Bert Müller

doi:10.1117/12.2592821

12 October 2021 Three-dimensional analysis of aligner gaps and thickness distributions using advanced laboratory-based hard x-ray tomography

Remi Ammann, Christine Tanner, Georg Schulz, Bekim Osmani, Prasad Nalabothu, Tino Töpper, Bert Müller

Author Affiliations +

Proceedings Volume 11840, Developments in X-Ray Tomography XIII; 1184008 (2021) https://doi.org/10.1117/12.2592821
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Physical and mechanical properties of aligners determine the clinical success of orthodontic treatments. A main element of the successful orthodontic tooth movements is the fitting of the aligner’s surface to the backside of the related teeth. The complex human tooth anatomy and the aligner’s production make gaps inevitable. The aim of the tomography study is the morphological assessment of the recently introduced NaturAligner (Bottmedical AG, Basel, Switzerland). Using the advanced micro-CT system (nanotom m, phoenix|xray, Waygate Technologies, Wunstorf, Germany), a series of eight different aligners, placed on the 3D-printed model of the upper jaw, were visualized. Based on these 3D datasets, the gaps between model and aligner were automatically segmented and the thickness distribution of the aligners automatically determined. This quantification, validated by manual inspection, clearly indicated that aligners fitted better the model, when higher process temperatures were applied.

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Citation Download Citation

Remi Ammann, Christine Tanner, Georg Schulz, Bekim Osmani, Prasad Nalabothu, Tino Töpper, and Bert Müller "Three-dimensional analysis of aligner gaps and thickness distributions using advanced laboratory-based hard x-ray tomography", Proc. SPIE 11840, Developments in X-Ray Tomography XIII, 1184008 (12 October 2021); https://doi.org/10.1117/12.2592821

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