Caries detection with tooth surface segmentation on intraoral photographic images using deep learning

Eun Young Park, Hyeonrae Cho, Sohee Kang, Sungmoon Jeong, Eun Kyong Kim

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Background: Intraoral photographic images are helpful in the clinical diagnosis of caries. Moreover, the application of artificial intelligence to these images has been attempted consistently. This study aimed to evaluate a deep learning algorithm for caries detection through the segmentation of the tooth surface using these images. Methods: In this prospective study, 2348 in-house intraoral photographic images were collected from 445 participants using a professional intraoral camera at a dental clinic in a university medical centre from October 2020 to December 2021. Images were randomly assigned to training (1638), validation (410), and test (300) datasets. For image segmentation of the tooth surface, classification, and localisation of caries, convolutional neural networks (CNN), namely U-Net, ResNet-18, and Faster R-CNN, were applied. Results: For the classification algorithm for caries images, the accuracy and area under the receiver operating characteristic curve were improved to 0.813 and 0.837 from 0.758 to 0.731, respectively, through segmentation of the tooth surface using CNN. Localisation algorithm for carious lesions after segmentation of the tooth area also showed improved performance. For example, sensitivity and average precision improved from 0.890 to 0.889 to 0.865 and 0.868, respectively. Conclusion: The deep learning model with segmentation of the tooth surface is promising for caries detection on photographic images from an intraoral camera. This may be an aided diagnostic method for caries with the advantages of being time and cost-saving.

Original languageEnglish
Article number573
JournalBMC Oral Health
Volume22
Issue number1
DOIs
StatePublished - Dec 2022

Keywords

  • Artificial intelligence
  • Caries localisation
  • Convolutional neural network
  • Deep learning
  • Intraoral camera
  • Tooth surface segmentation

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