Semi-supervised segmentation of tooth from 3D scanned dental arches

Ammar Alsheghri; Farnoosh Ghadiri; Ying Zhang; Olivier Lessard; Julia Keren; Farida Cheriet; François Guibault

doi:10.1117/12.2612655

4 April 2022 Semi-supervised segmentation of tooth from 3D scanned dental arches

Ammar Alsheghri, Farnoosh Ghadiri, Ying Zhang, Olivier Lessard, Julia Keren, Farida Cheriet, François Guibault

Proceedings Volume 12032, Medical Imaging 2022: Image Processing; 120322W (2022) https://doi.org/10.1117/12.2612655
Event: SPIE Medical Imaging, 2022, San Diego, California, United States

Conference Poster

Abstract

Dental offices tackle thousands of dental reconstructions every year. Complexity and abnormalities in dentition make segmentation of an optical scan a challenging manual task that takes 45 minutes on average. The present work improves the generalization of currently available deep learning segmentation model on 3D dental arches by introducing a new loss function to leverage unlabeled available data. The semi-supervised segmentation network is trained using a joint loss that combines a supervised loss of annotated input and a self-supervised loss of non-labeled input. Our results showed that combining self-supervised and supervised learning improved the segmentation score by 13 % compared with purely supervised learning for the same amount of labeled data. It is concluded that combining representations obtained from self-supervised learning with supervised learning improves the generalization of the 3D tooth segmentation model in the case of few available labeled data.

Conference Presentation

Citation Download Citation

Ammar Alsheghri, Farnoosh Ghadiri, Ying Zhang, Olivier Lessard, Julia Keren, Farida Cheriet, and François Guibault "Semi-supervised segmentation of tooth from 3D scanned dental arches", Proc. SPIE 12032, Medical Imaging 2022: Image Processing, 120322W (4 April 2022); https://doi.org/10.1117/12.2612655

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