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KJO Korean Journal of Orthodontics

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pISSN 2234-7518
eISSN 2005-372X
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Korean J Orthod   

First Published Date November 21, 2022

Copyright © The Korean Association of Orthodontists.

Accuracy of periodontal bone loss assessed by three-dimensional periodontal ligament models using cone-beam computed tomography at different resolutions

Hangmiao Lyu1, Li Xu2, Huimin Ma1, Jianxia Hou2, Xiaoxia Wang3, Yong Wang4, Yijiao Zhao4, Weiran Li1, Xiaotong Li1

1Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China.
2Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, 100081, People's Republic of China. 3Department of Oral and Maxillofacial Surgery, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China.
4Center of Digital Dentistry, Peking University School and Hospital of Stomatology; National Engineering Laboratory for Digital and Material Technology of Stomatology; Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China.

Correspondence to:1, Weiran Li (DDS, PhD, Professor)
Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, No. 22 ZhongGuanCun Nandajie, HaiDian District, Beijing 100081, People’s Republic of China.
Zip code:10080
Telephone number: 010-82195381
E-mail: weiranli2003@163.com; weiranli@bjmu.edu.cn
2, Xiaotong Li (DDS, PhD, Associate Professor)
Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, No. 22 ZhongGuanCun Nandajie, HaiDian District, Beijing 100081, People’s Republic of China.
Zip code:100081
Telephone number: 010-82195739
E-mail: xiaotonglee@hotmail.com

Abstract

Objective: The present study aimed to introduce a method for obtaining three-dimensional (3D) digital models of the periodontal ligament (PDL) using 3D cone-beam computed tomography (CBCT) reconstruction and to evaluate the accuracy and agreement of the periodontal bone loss assessed by 3D PDL models.
Methods: CBCT data collected from four skeletal class III patients prior to periodontal surgery were reconstructed at 3 voxel sizes (0.2 mm, 0.25 mm and 0.3 mm), and 3D teeth and alveolar bone models were generated to obtain PDL digital models of the upper and lower anterior teeth. Linear measurements of the alveolar bone crest obtained during periodontal surgery were compared with digital measurements to examine the accuracy of the digital models. The agreement and reliability of the digital PDL models were analysed using intra- and interexaminer correlations and Bland–Altman plots.
Results: Digital models of the upper and lower anterior teeth, PDL and alveolar bone of four patients were successfully established. Linear measurements obtained from the 3D digital models were accurate compared with the measurements obtained intraoperatively, and there were no significant differences among different voxel sizes at different sites. High diagnostic coincidence rates were found for the upper anterior teeth, and high intra- and interexaminer agreement was found for the digital models.
Conclusions: Digital PDL models acquired by 3D CBCT reconstruction provide accurate and useful information regarding the alveolar crest morphology and allow reproducible measurements, which could assist clinicians to evaluate periodontal prognosis and determine an appropriate orthodontic treatment plan.

Keywords: Digital models, 3D reconstruction, Cone-beam computed tomography

Article

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Korean J Orthod   

First Published Date November 21, 2022

Copyright © The Korean Association of Orthodontists.

Accuracy of periodontal bone loss assessed by three-dimensional periodontal ligament models using cone-beam computed tomography at different resolutions

Hangmiao Lyu1, Li Xu2, Huimin Ma1, Jianxia Hou2, Xiaoxia Wang3, Yong Wang4, Yijiao Zhao4, Weiran Li1, Xiaotong Li1

1Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China.
2Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, 100081, People's Republic of China. 3Department of Oral and Maxillofacial Surgery, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China.
4Center of Digital Dentistry, Peking University School and Hospital of Stomatology; National Engineering Laboratory for Digital and Material Technology of Stomatology; Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China.

Correspondence to:1, Weiran Li (DDS, PhD, Professor)
Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, No. 22 ZhongGuanCun Nandajie, HaiDian District, Beijing 100081, People’s Republic of China.
Zip code:10080
Telephone number: 010-82195381
E-mail: weiranli2003@163.com; weiranli@bjmu.edu.cn
2, Xiaotong Li (DDS, PhD, Associate Professor)
Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, No. 22 ZhongGuanCun Nandajie, HaiDian District, Beijing 100081, People’s Republic of China.
Zip code:100081
Telephone number: 010-82195739
E-mail: xiaotonglee@hotmail.com

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective: The present study aimed to introduce a method for obtaining three-dimensional (3D) digital models of the periodontal ligament (PDL) using 3D cone-beam computed tomography (CBCT) reconstruction and to evaluate the accuracy and agreement of the periodontal bone loss assessed by 3D PDL models.
Methods: CBCT data collected from four skeletal class III patients prior to periodontal surgery were reconstructed at 3 voxel sizes (0.2 mm, 0.25 mm and 0.3 mm), and 3D teeth and alveolar bone models were generated to obtain PDL digital models of the upper and lower anterior teeth. Linear measurements of the alveolar bone crest obtained during periodontal surgery were compared with digital measurements to examine the accuracy of the digital models. The agreement and reliability of the digital PDL models were analysed using intra- and interexaminer correlations and Bland–Altman plots.
Results: Digital models of the upper and lower anterior teeth, PDL and alveolar bone of four patients were successfully established. Linear measurements obtained from the 3D digital models were accurate compared with the measurements obtained intraoperatively, and there were no significant differences among different voxel sizes at different sites. High diagnostic coincidence rates were found for the upper anterior teeth, and high intra- and interexaminer agreement was found for the digital models.
Conclusions: Digital PDL models acquired by 3D CBCT reconstruction provide accurate and useful information regarding the alveolar crest morphology and allow reproducible measurements, which could assist clinicians to evaluate periodontal prognosis and determine an appropriate orthodontic treatment plan.

Keywords: Digital models, 3D reconstruction, Cone-beam computed tomography