Evidence map›Paper›PMID 33405976›Full record

ArticleDento maxillo facial radiology2021

Deep-learning for predicting C-shaped canals in mandibular second molars on panoramic radiographs.

Su-Jin Jeon, Jong-Pil Yun, Han-Gyeol Yeom, Woo-Sang Shin, Jong-Hyun Lee, Seung-Hyun Jeong, Min-Seock Seo

Abstract read
In one paragraph

Article in Dento maxillo facial radiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

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0cells of the map it votes in
31citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed.

  1. Review
  2. Artificial Intelligence in Endodontics-A Bibliometric Analysis.Australian endodontic journal : the journal of the Australian Society of Endodontology Inc · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Su-Jin JeonDepartment of Conservative Dentistry, Wonkwang University Daejeon Dental Hospital, Daejeon, South Korea.
Jong-Pil YunSafety System Research Group, Korea Institute of Industrial Technology (KITECH), Gyeongsan, South Korea.
Han-Gyeol YeomDepartment of Oral and Maxillofacial Radiology, Wonkwang University Daejeon Dental Hospital, Daejeon, South Korea.
Woo-Sang ShinSafety System Research Group, Korea Institute of Industrial Technology (KITECH), Gyeongsan, South Korea.
Jong-Hyun LeeSafety System Research Group, Korea Institute of Industrial Technology (KITECH), Gyeongsan, South Korea.
Seung-Hyun JeongSafety System Research Group, Korea Institute of Industrial Technology (KITECH), Gyeongsan, South Korea.
Min-Seock SeoDepartment of Conservative Dentistry, Wonkwang University Daejeon Dental Hospital, Daejeon, South Korea.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe aim of this study was to evaluate the use of a convolutional neural network (CNN) system for predicting C-shaped canals in mandibular second molars on panoramic radiographs.

methodsPanoramic and cone beam CT (CBCT) images obtained from June 2018 to May 2020 were screened and 1020 patients were selected. Our dataset of 2040 sound mandibular second molars comprised 887 C-shaped canals and 1153 non-C-shaped canals. To confirm the presence of a C-shaped canal, CBCT images were analyzed by a radiologist and set as the gold standard. A CNN-based deep-learning model for predicting C-shaped canals was built using Xception. The training and test sets were set to 80 to 20%, respectively. Diagnostic performance was evaluated using accuracy, sensitivity, specificity, and precision. Receiver-operating characteristics (ROC) curves were drawn, and the area under the curve (AUC) values were calculated. Further, gradient-weighted class activation maps (Grad-CAM) were generated to localize the anatomy that contributed to the predictions.

resultsThe accuracy, sensitivity, specificity, and precision of the CNN model were 95.1, 92.7, 97.0, and 95.9%, respectively. Grad-CAM analysis showed that the CNN model mainly identified root canal shapes converging into the apex to predict the C-shaped canals, while the root furcation was predominantly used for predicting the non-C-shaped canals.

conclusionsThe deep-learning system had significant accuracy in predicting C-shaped canals of mandibular second molars on panoramic radiographs.

Indexed as

Deep LearningCone-Beam Computed TomographyDental Pulp CavityHumansMandibleMolarRadiography, PanoramicTooth RootConvolutional neural networkC-shaped canalDeep learningDiagnostic imagingPanoramic radiograph

Identifiers

PMID33405976
PMCPMC8231674

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.