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Grillo R, Balel Y, Reis BAQ, Stanbouly D, Samieirad S, Melhem-Elias F. The online attention analysis on orthognathic surgery research. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2024; 125:101826. [PMID: 38484842 DOI: 10.1016/j.jormas.2024.101826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/01/2024] [Accepted: 03/11/2024] [Indexed: 03/19/2024]
Abstract
OBJECTIVES Altmetrics is one of the fields of bibliometrics that seeks to assess the impact and interest of a given subject through Internet users. The aim of this study is to make an altmetric analysis of the orthognathic surgery literature. METHODS A literature search was conducted using Dimensions app up to December 2023. A list of the 100 most mentioned articles on the topic was compiled. A Google Trends search was performed with same strategy to visualize important data regarding internet search. Charts and tables were created using Microsoft Excel and VOSviewer software to allow bibliometric visualization. RESULTS There was a very poor correlation between the number of mentions and the number of citations (r = 0.0202). Most articles discussed on technical innovations associated to orthognathic surgery, majority related to virtual planning (n = 26). Other topics considered interesting to internet readers were complications (n = 18), surgical technique (n = 14), and psychological aspects/quality of life (n = 13). CONCLUSION Online interest in orthognathic surgery closely aligns with the level of academic interest but is also influenced by factors such as location and economic status. The internet is a powerful tool for disseminating scientific research to a broad audience, making it more accessible and engaging than traditional academic channels.
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Affiliation(s)
- Ricardo Grillo
- Department of Oral & Maxillofacial Surgery, School of Dentistry of the University of São Paulo, São Paulo-SP, Brazil; Department of Oral & Maxillofacial Surgery, Faculdade Patos de Minas, Brasília-DF, Brazil.
| | - Yunus Balel
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Tokat Gaziosmanpaşa University, Tokat, Turkey
| | | | - Dani Stanbouly
- Columbia University College of Dental Medicine, New York, NY, USA
| | - Sahand Samieirad
- Department of Oral & Maxillofacial surgery, Mashhad dental school, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fernando Melhem-Elias
- Department of Oral & Maxillofacial Surgery, School of Dentistry of the University of São Paulo, São Paulo-SP, Brazil; Private Practice in Oral and Maxillofacial Surgery, São Paulo-SP, Brazil
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Jang TJ, Yun HS, Hyun CM, Kim JE, Lee SH, Seo JK. Fully automatic integration of dental CBCT images and full-arch intraoral impressions with stitching error correction via individual tooth segmentation and identification. Med Image Anal 2024; 93:103096. [PMID: 38301347 DOI: 10.1016/j.media.2024.103096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 12/31/2023] [Accepted: 01/25/2024] [Indexed: 02/03/2024]
Abstract
We present a fully automated method of integrating intraoral scan (IOS) and dental cone-beam computerized tomography (CBCT) images into one image by complementing each image's weaknesses. Dental CBCT alone may not be able to delineate precise details of the tooth surface due to limited image resolution and various CBCT artifacts, including metal-induced artifacts. IOS is very accurate for the scanning of narrow areas, but it produces cumulative stitching errors during full-arch scanning. The proposed method is intended not only to compensate the low-quality of CBCT-derived tooth surfaces with IOS, but also to correct the cumulative stitching errors of IOS across the entire dental arch. Moreover, the integration provides both gingival structure of IOS and tooth roots of CBCT in one image. The proposed fully automated method consists of four parts; (i) individual tooth segmentation and identification module for IOS data (TSIM-IOS); (ii) individual tooth segmentation and identification module for CBCT data (TSIM-CBCT); (iii) global-to-local tooth registration between IOS and CBCT; and (iv) stitching error correction for full-arch IOS. The experimental results show that the proposed method achieved landmark and surface distance errors of 112.4μm and 301.7μm, respectively.
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Affiliation(s)
- Tae Jun Jang
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea
| | - Hye Sun Yun
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea.
| | - Chang Min Hyun
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea
| | - Jong-Eun Kim
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Sang-Hwy Lee
- Department of Oral and Maxillofacial Surgery, Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Jin Keun Seo
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea
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Kazimierczak N, Kazimierczak W, Serafin Z, Nowicki P, Jankowski T, Jankowska A, Janiszewska-Olszowska J. Skeletal facial asymmetry: reliability of manual and artificial intelligence-driven analysis. Dentomaxillofac Radiol 2024; 53:52-59. [PMID: 38214946 PMCID: PMC11003660 DOI: 10.1093/dmfr/twad006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/29/2023] [Accepted: 11/11/2023] [Indexed: 01/13/2024] Open
Abstract
OBJECTIVES To compare artificial intelligence (AI)-driven web-based platform and manual measurements for analysing facial asymmetry in craniofacial CT examinations. METHODS The study included 95 craniofacial CT scans from patients aged 18-30 years. The degree of asymmetry was measured based on AI platform-predefined anatomical landmarks: sella (S), condylion (Co), anterior nasal spine (ANS), and menton (Me). The concordance between the results of automatic asymmetry reports and manual linear 3D measurements was calculated. The asymmetry rate (AR) indicator was determined for both automatic and manual measurements, and the concordance between them was calculated. The repeatability of manual measurements in 20 randomly selected subjects was assessed. The concordance of measurements of quantitative variables was assessed with interclass correlation coefficient (ICC) according to the Shrout and Fleiss classification. RESULTS Erroneous AI tracings were found in 16.8% of cases, reducing the analysed cases to 79. The agreement between automatic and manual asymmetry measurements was very low (ICC < 0.3). A lack of agreement between AI and manual AR analysis (ICC type 3 = 0) was found. The repeatability of manual measurements and AR calculations showed excellent correlation (ICC type 2 > 0.947). CONCLUSIONS The results indicate that the rate of tracing errors and lack of agreement with manual AR analysis make it impossible to use the tested AI platform to assess the degree of facial asymmetry.
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Affiliation(s)
| | - Wojciech Kazimierczak
- Kazimierczak Private Dental Practice, 85-009 Bydgoszcz, Poland
- Department of Radiology and Diagnostic Imaging, Collegium Medicum, Nicolaus Copernicus University in Torun, 85-067 Bydgoszcz, Poland
| | - Zbigniew Serafin
- Department of Radiology and Diagnostic Imaging, Collegium Medicum, Nicolaus Copernicus University in Torun, 85-067 Bydgoszcz, Poland
| | - Paweł Nowicki
- Kazimierczak Private Dental Practice, 85-009 Bydgoszcz, Poland
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Liu J, Hao J, Lin H, Pan W, Yang J, Feng Y, Wang G, Li J, Jin Z, Zhao Z, Liu Z. Deep learning-enabled 3D multimodal fusion of cone-beam CT and intraoral mesh scans for clinically applicable tooth-bone reconstruction. PATTERNS (NEW YORK, N.Y.) 2023; 4:100825. [PMID: 37720330 PMCID: PMC10499902 DOI: 10.1016/j.patter.2023.100825] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/24/2023] [Accepted: 07/21/2023] [Indexed: 09/19/2023]
Abstract
High-fidelity three-dimensional (3D) models of tooth-bone structures are valuable for virtual dental treatment planning; however, they require integrating data from cone-beam computed tomography (CBCT) and intraoral scans (IOS) using methods that are either error-prone or time-consuming. Hence, this study presents Deep Dental Multimodal Fusion (DDMF), an automatic multimodal framework that reconstructs 3D tooth-bone structures using CBCT and IOS. Specifically, the DDMF framework comprises CBCT and IOS segmentation modules as well as a multimodal reconstruction module with novel pixel representation learning architectures, prior knowledge-guided losses, and geometry-based 3D fusion techniques. Experiments on real-world large-scale datasets revealed that DDMF achieved superior segmentation performance on CBCT and IOS, achieving a 0.17 mm average symmetric surface distance (ASSD) for 3D fusion with a substantial processing time reduction. Additionally, clinical applicability studies have demonstrated DDMF's potential for accurately simulating tooth-bone structures throughout the orthodontic treatment process.
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Affiliation(s)
- Jiaxiang Liu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Hangzhou 310000, China
- Zhejiang University-University of Illinois at Urbana-Champaign Institute, Zhejiang University, Haining 314400, China
- College of Computer Science and Technology, Zhejiang University, Hangzhou 310058, China
| | - Jin Hao
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Harvard School of Dental Medicine, Harvard University, Boston, MA 02115, USA
| | - Hangzheng Lin
- Zhejiang University-University of Illinois at Urbana-Champaign Institute, Zhejiang University, Haining 314400, China
| | - Wei Pan
- OPT Machine Vision Tech Co., Ltd., Tokyo 135-0064, Japan
| | - Jianfei Yang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Yang Feng
- Angelalign Inc., Shanghai 200433, China
| | - Gaoang Wang
- Zhejiang University-University of Illinois at Urbana-Champaign Institute, Zhejiang University, Haining 314400, China
| | - Jin Li
- Department of Stomatology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People’s Hospital, Shenzhen 518025, China
| | - Zuolin Jin
- Department of Orthodontics, School of Stomatology, Air Force Medical University, Xi’an 710032, China
| | - Zhihe Zhao
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Zuozhu Liu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Hangzhou 310000, China
- Zhejiang University-University of Illinois at Urbana-Champaign Institute, Zhejiang University, Haining 314400, China
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Al-Ubaydi AS, Al-Groosh D. The Validity and Reliability of Automatic Tooth Segmentation Generated Using Artificial Intelligence. ScientificWorldJournal 2023; 2023:5933003. [PMID: 37497386 PMCID: PMC10368498 DOI: 10.1155/2023/5933003] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 07/03/2023] [Accepted: 07/08/2023] [Indexed: 07/28/2023] Open
Abstract
This study aimed at evaluating the precision of the segmented tooth model (STM) that was produced by the artificial intelligence (AI) program (CephX®) with an intraoral scan (IOS) and insignia outcomes. Methods. 10 patients with Cl I malocclusion (mild-to-moderate crowding) who underwent nonextraction orthodontic therapy with the Insignia™ system had IOS and CBCT scans taken before treatment. AI was used to produce a total of 280 STMs; each tooth will be measured from three aspects (apexo-occlusal, mesiodistal, and labiolingual) for DICOM and STL formats. Also, root volume measurements for each tooth generated by using the CephX® software and Insignia™ system were compared. The software used for these measurements was the OnDemand3D program used for the multiplanar reconstruction for DICOM format and Geomagic® Control X™ used for STL format. Statistics. An intraclass correlation (ICC) analysis was used to check the agreement between the volume measurement of the segmented teeth generated by using the CephX® and Insignia™ system. Also, it was used to check the agreement between the STL (IOS), STL (CephX®), and DICOM tooth models. In addition, it was used to determine the intraexaminer repeatability by remeasuring five randomly selected individuals two weeks after the initial measurement. After confirmation of the data normality using the Shapiro-Wilk test, the right and left tooth models and the differences between the DICOM, CephX® (STL), and IOS (STL) tooth models were compared using a paired t-test. The STL (IOS), STL (CephX®), and DICOM tooth models were compared utilizing the ANOVA test. p < 0.05 was set as the statistical significance level. Result. Overall data showed good agreement with ICC. The measurements of the various tooth types on the right and left sides did not differ significantly. Also, there was no significant difference between the three groups. Conclusions. The automatic AI approach (CephX®) may be advised in the clinical practice for patients with mild crowding and no teeth restorations due to its speed and effectiveness.
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Affiliation(s)
- Ammar Sh. Al-Ubaydi
- College of Dentistry, University of Baghdad, Baghdad, Iraq
- Ministry of Health, Baghdad, Iraq
| | - Dheaa Al-Groosh
- Orthodontic Department, College of Dentistry, University of Baghdad, Baghdad, Iraq
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Yang S, Lee SJ, Yoo JY, Kang SR, Kim JM, Kim JE, Huh KH, Lee SS, Heo MS, Yang HJ, Yi WJ. V 2-Net: An Attention-guided Volumetric Regression Network for Tooth Landmark Localization on CT Images with Metal Artifacts. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-5. [PMID: 38083381 DOI: 10.1109/embc40787.2023.10340891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
For virtual surgical planning in orthognathic surgery, marking tooth landmarks on CT images is an important procedure. However, the manual localization procedure of tooth landmarks is time-consuming, labor-intensive, and requires expert knowledge. Also, direct and automatic tooth landmark localization on CT images is difficult because of the lower resolution and metal artifacts of dental images. The purpose of this study was to propose an attention-guided volumetric regression network (V2-Net) for accurate tooth landmark localization on CT images with metal artifacts and lower resolution. V2-Net has an attention-guided network architecture using a coarse-to-fine-attention mechanism that guided the 3D probability distribution of tooth landmark locations within anatomical structures from the coarse V-Net to the fine V-Net for more focus on tooth landmarks. In addition, we combined attention-guided learning and a 3D attention module with optimal Pseudo Huber loss to improve the localization accuracy. Our results show that the proposed method achieves state-of-the-art accuracy of 0.85 ± 0.40 mm in terms of mean radial error, outperforming previous studies. In ablation studies, we observed that the proposed attention-guided learning and a 3D attention module improved the accuracy of tooth landmark localization in CT images of lower resolution and metal artifacts. Furthermore, our method achieved 97.92% in terms of the success detection rate within the clinically accepted accuracy range of 2.0 mm.
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Zhao J, Xu Y, Wang J, Lu Z, Qi K. 3-dimensional analysis of hard- and soft-tissue symmetry in a Chinese population. BMC Oral Health 2023; 23:432. [PMID: 37386472 PMCID: PMC10308641 DOI: 10.1186/s12903-023-03163-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 06/22/2023] [Indexed: 07/01/2023] Open
Abstract
BACKGROUND Facial symmetry severely affects appearance and function. Large numbers of patients seek orthodontic treatment to improve facial symmetry. However, the correlation between hard- and soft-tissue symmetry is still unclear. Our aim was to investigate the hard- and soft-tissue symmetry in subjects with different levels of menton deviation and sagittal skeletal classes with 3D digital analysis and to investigate the relationship between the entire and individual hard- and soft-tissues. METHODS A total of 270 adults (135 males and 135 females) consisting of 45 subjects of each sex in each sagittal skeletal classification group. All subjects were further classified into relative symmetry (RS), moderate asymmetry (MA) and severe asymmetry (SA) groups based on the degree of menton deviation from the mid-sagittal plane (MSP). The 3D images were segmented into anatomical structures and mirrored across the MSP after establishing a coordinate system. Original and mirrored images were registered by a best-fit algorithm, and the corresponding root mean square (RMS) values and colormap were obtained. The Mann‒Whitney U test and Spearman correlation were conducted for statistical analysis. RESULTS The RMS increased with greater deviations with regard to the deviation of the menton in most of anatomical structures. Asymmetry was represented in the same way regardless of sagittal skeletal pattern. The soft-tissue asymmetry had a significant correlation with dentition in the RS group (0.409), while in the SA group, it was related to the ramus (0.526) and corpus (0.417) in males and was related to the ramus in the MA (0.332) and SA (0.359) groups in females. CONCLUSIONS The mirroring method combining CBCT and 3dMD provides a new approach for symmetry analysis. Asymmetry might not be influenced by sagittal skeletal patterns. Soft-tissue asymmetry might be reduced by improving the dentition in individuals with RS group, while among those with MA or SA, whose menton deviation was larger than 2 mm, orthognathic treatment should be considered.
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Affiliation(s)
- Jiamin Zhao
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China
- Department of Orthodontics, Stomatological Hospital of Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China
| | - Yifei Xu
- Department of Oral Anatomy and Physiology and TMD, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Jinxiu Wang
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China
- Department of Orthodontics, Stomatological Hospital of Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China
| | - Zhen Lu
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China
- Department of Orthodontics, Stomatological Hospital of Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China
| | - Kun Qi
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China.
- Department of Orthodontics, Stomatological Hospital of Xi'an Jiaotong University, 98 XiWu Road, 710004, Xi'an, Shaanxi, P.R. China.
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Abstract
Three-dimensional symmetry and coordination are important factors in facial aesthetics, and analysis of facial asymmetry is the basis for clinical diagnosis, treatment, and doctor–patient communication. With the development of three-dimensional measurement and data analysis technology, facial asymmetry analysis methods are mainly based on facial anatomic landmarks, original-mirror alignment algorithm, facial anthropometric mask, and artificial intelligence. This review summarizes the methods of three-dimensional facial asymmetry analysis, and current research progress in the field. The advantages and limitations of various methods are analyzed and discussed to provide a reference for oral clinical application.
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Zou B, Kim JH, Kim SH, Choi TH, Shin Y, Kook YA, Lee NK. Accuracy of a surface-based fusion method when integrating digital models and the cone beam computed tomography scans with metal artifacts. Sci Rep 2022; 12:8034. [PMID: 35577911 PMCID: PMC9110746 DOI: 10.1038/s41598-022-11677-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 04/22/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractThe aim of this study was to evaluate the intra- and inter-observer reliability of maxillary digital dental model integration into cone-beam computed tomography (CBCT) scans to reconstruct three-dimensional (3D) skeletodental models for orthognathic patients. This retrospective study consisted of CBCT and digital maxillary dentition images of 20 Class III orthognathic patients. After two repeated fusions of digital cast images with reconstructed CBCT images by a digital engineer and an orthodontist respectively, the 3D coordinate values of the canines, first molars, and central incisors were evaluated. The intra- and inter-observer reliability of 3D positions of maxillary teeth were compared using intraclass correlation coefficients (ICCs). Intra-observer reliability of x-, y-, and z-coordinate values of maxillary teeth showed significant and excellent agreement in an engineer (0.946 ≤ ICC ≤ 1.000) and an orthodontist (0.876 ≤ ICC ≤ 1.000). The inter-observer reliability of the y- and z-coordinates of each tooth was significantly excellent or good, but that of the x-coordinates showed insignificantly poor to moderate agreement. This study showed that the integration of maxillary digital models into CBCT scans was clinically reliable. However, considering the low inter-observer reliability on the x-coordinates of dentition, clinical experience and repeated learning are needed for accurate application of digital skeletodental model in orthognathic patients.
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Lee SC, Hwang HS, Lee KC. Accuracy of deep learning-based integrated tooth models by merging intraoral scans and CBCT scans for 3D evaluation of root position during orthodontic treatment. Prog Orthod 2022; 23:15. [PMID: 35527317 PMCID: PMC9081076 DOI: 10.1186/s40510-022-00410-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 04/12/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Objective
This study aimed to evaluate the accuracy of deep learning-based integrated tooth models (ITMs) by merging intraoral scans and cone-beam computed tomography (CBCT) scans for three-dimensional (3D) evaluation of root position during orthodontic treatment and to compare the fabrication process of integrated tooth models (ITMs) with manual method.
Material and methods
Intraoral scans and corresponding CBCT scans before and after treatment were obtained from 15 patients who completed orthodontic treatment with premolar extraction. A total of 600 ITMs were generated using deep learning technology and manual methods by merging the intraoral scans and CBCT scans at pretreatment. Posttreatment intraoral scans were integrated into the tooth model, and the resulting estimated root positions were compared with the actual root position at posttreatment CBCT. Discrepancies between the estimated and actual root position including average surface differences, arch widths, inter-root distances, and root axis angles were obtained in both the deep learning and manual method, and these measurements were compared between the two methods.
Results
The average surface differences of estimated and actual ITMs in the manual method were 0.02 mm and 0.03 mm for the maxillary and mandibular arches, respectively. In the deep learning method, the discrepancies were 0.07 mm and 0.08 mm for the maxillary and mandibular arches, respectively. For the measurements of arch widths, inter-root distances, and root axis angles, there were no significant differences between estimated and actual models both in the manual and in the deep learning methods, except for some measurements. Comparing the two methods, only three measurements showed significant differences. The procedure times taken to obtain the measurements were longer in the manual method than in the deep learning method.
Conclusion
Both deep learning and manual methods showed similar accuracy in the integration of intraoral scans and CBCT images. Considering time and efficiency, the deep learning automatic method for ITMs is highly recommended for clinical practice.
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Zoabi A, Redenski I, Oren D, Kasem A, Zigron A, Daoud S, Moskovich L, Kablan F, Srouji S. 3D Printing and Virtual Surgical Planning in Oral and Maxillofacial Surgery. J Clin Med 2022; 11:jcm11092385. [PMID: 35566511 PMCID: PMC9104292 DOI: 10.3390/jcm11092385] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 04/15/2022] [Accepted: 04/18/2022] [Indexed: 02/01/2023] Open
Abstract
Compared to traditional manufacturing methods, additive manufacturing and 3D printing stand out in their ability to rapidly fabricate complex structures and precise geometries. The growing need for products with different designs, purposes and materials led to the development of 3D printing, serving as a driving force for the 4th industrial revolution and digitization of manufacturing. 3D printing has had a global impact on healthcare, with patient-customized implants now replacing generic implantable medical devices. This revolution has had a particularly significant impact on oral and maxillofacial surgery, where surgeons rely on precision medicine in everyday practice. Trauma, orthognathic surgery and total joint replacement therapy represent several examples of treatments improved by 3D technologies. The widespread and rapid implementation of 3D technologies in clinical settings has led to the development of point-of-care treatment facilities with in-house infrastructure, enabling surgical teams to participate in the 3D design and manufacturing of devices. 3D technologies have had a tremendous impact on clinical outcomes and on the way clinicians approach treatment planning. The current review offers our perspective on the implementation of 3D-based technologies in the field of oral and maxillofacial surgery, while indicating major clinical applications. Moreover, the current report outlines the 3D printing point-of-care concept in the field of oral and maxillofacial surgery.
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Affiliation(s)
- Adeeb Zoabi
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Idan Redenski
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Daniel Oren
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Adi Kasem
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Asaf Zigron
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Shadi Daoud
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Liad Moskovich
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Fares Kablan
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Samer Srouji
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Galilee Medical Center, Nahariya 2210001, Israel; (A.Z.); (I.R.); (D.O.); (A.K.); (A.Z.); (S.D.); (L.M.); (F.K.)
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
- Correspondence:
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Lee JH, Byun SH, Yi SM, Park IY, Yang BE, Lee HL. Efficacy of Constructing Digital Hybrid Skull-Dentition Images Using an Intraoral Scanner and Cone-Beam Computed Tomography. SCANNING 2022; 2022:8221514. [PMID: 35316954 PMCID: PMC8913058 DOI: 10.1155/2022/8221514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/27/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Cone-beam computed tomography (CBCT) can distort dentition, and additional imaging is often required. A plaster model to help digitize dental images has been widely used in clinical practice, but there are some inconveniences such as complexity of the process and the risk of damage. The aim of this study was to evaluate the potential for improving dentition imaging with CBCT scans using an intraoral scanner instead of a plaster model. The study used laser model-scanned images of plaster models, imaging from two intraoral scanners, and CBCT images from 20 patients aged 12-18 years. CS 3600 (Carestream Dental, Atlanta, USA) and i700 (Medit, Seoul, Korea) were used as intraoral scanners. The full arch was scanned at once or in three sections using intraoral scanners. The segmented scans were merged to obtain full-arch images. With i700, full-arch images were additionally acquired using its "smart stich" function. The virtual skull-dentition hybrid images obtained from intraoral scanners were superimposed with images obtained using a plaster cast. The difference and distance of coordinate values at each reference point were measured. The average distances from the images obtained with the plaster cast were smaller than 0.39 mm, which is the voxel size of CBCT. Scanning the complete or partial arch using CS 3600 or i700 satisfactorily complemented the CBCT when compared to the plaster model. The virtual skull-dentition hybrid image obtained from intraoral scanners will be clinically useful, especially for patients and surgeons who have difficulty in scanning the complete arch at once.
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Affiliation(s)
- Joo-Hee Lee
- Division of Pediatric Dentistry, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea
| | - Soo-Hwan Byun
- Division of Oral & Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
| | - Sang-Min Yi
- Division of Oral & Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
| | - In-Young Park
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Division of Orthodontics, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea
| | - Byoung-Eun Yang
- Division of Oral & Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
| | - Hye-Lim Lee
- Division of Pediatric Dentistry, Hallym University Sacred Heart Hospital, Anyang 14066, Republic of Korea
- Graduate School of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon 24252, Republic of Korea
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Andriola FDO, Haas Junior OL, Guijarro-Martínez R, Hernández-Alfaro F, de Oliveira RB, Pagnoncelli RM, Swennen GRJ. Computed tomography imaging superimposition protocols to assess outcomes in orthognathic surgery: a systematic review with comprehensive recommendations. Dentomaxillofac Radiol 2022; 51:20210340. [PMID: 34520241 PMCID: PMC8925870 DOI: 10.1259/dmfr.20210340] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES A systematic review was performed to analyze the current evidence on three-dimensional (3D) computed tomography (CT) superimposition protocols used to assess dentomaxillofacial changes after orthognathic and orthofacial surgery. Accuracy, reproducibility, and efficiency were evaluated. METHODS The search was divided into Main Search (PubMed, EMBASE, Cochrane Library, LILACS, and SciELO), Grey Literature search (Google Scholar and Open Grey), and Manual search. Thirteen studies were included. Of these, 10 reported data on accuracy, 10 on reproducibility and five on efficiency. Seven proposed or evaluated methods of voxel-based superimposition, three focused on the surface-based technique, one compared surface- and voxel-based superimposition protocols, one used the maximum mutual information algorithm, and one described a landmark-based superimposition method. Cone-beam computed tomography (CBCT) was the most common imaging technique, being used in 10 studies. RESULTS The accuracy of most methods was high, showing mean differences smaller than voxels' dimensions, ranging between 0.05 and 1.76 mm for translational accuracy, and 0.10-1.09° for rotational accuracy. The overall reproducibility was considered good as demonstrated by the small mean error (range: 0.01-0.26 mm) and high correlation coefficients (range: 0.53-1.00). Timing to complete virtual superimposition techniques ranged between a few seconds up to 40 min. CONCLUSIONS Voxel-based superimposition protocols presented the highest accuracy and reproducibility. Moreover, superimposition protocols that used automated processes and involved only one software were the most efficient.
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Affiliation(s)
| | | | | | | | - Rogério Belle de Oliveira
- Department of Oral and Maxillofacial Surgery, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Rogério Miranda Pagnoncelli
- Department of Oral and Maxillofacial Surgery, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
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Lee SJ, Yoo JY, Woo SY, Yang HJ, Kim JE, Huh KH, Lee SS, Heo MS, Hwang SJ, Yi WJ. A Complete Digital Workflow for Planning, Simulation, and Evaluation in Orthognathic Surgery. J Clin Med 2021; 10:jcm10174000. [PMID: 34501449 PMCID: PMC8432567 DOI: 10.3390/jcm10174000] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 12/15/2022] Open
Abstract
The purpose of this study was to develop a complete digital workflow for planning, simulation, and evaluation for orthognathic surgery based on 3D digital natural head position reproduction, a cloud-based collaboration platform, and 3D landmark-based evaluation. We included 24 patients who underwent bimaxillary orthognathic surgery. Surgeons and engineers could share the massive image data immediately and conveniently and collaborate closely in surgical planning and simulation using a cloud-based platform. The digital surgical splint could be optimized for a specific patient before or after the physical fabrication of 3D printing splints through close collaboration. The surgical accuracy was evaluated comprehensively via the translational (linear) and rotational (angular) discrepancies between identical 3D landmarks on the simulation and postoperative computed tomography (CT) models. The means of the absolute linear discrepancy at eight tooth landmarks were 0.61 ± 0.55, 0.86 ± 0.68, and 1.00 ± 0.79 mm in left–right, advance–setback, and impaction–elongation directions, respectively, and 1.67 mm in the root mean square direction. The linear discrepancy in the left–right direction was significantly different from the other two directions as shown by analysis of variance (ANOVA, p < 0.05). The means of the absolute angular discrepancies were 1.43 ± 1.06°, 0.50 ± 0.31°, and 0.58 ± 0.41° in the pitch, roll, and yaw orientations, respectively. The angular discrepancy in the pitch orientation was significantly different from the other two orientations (ANOVA, p < 0.05). The complete digital workflow that we developed for orthognathic patients provides efficient and streamlined procedures for orthognathic surgery and shows high surgical accuracy with efficient image data sharing and close collaboration.
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Affiliation(s)
- Sang-Jeong Lee
- Dental Research Institute, Seoul National University, Seoul 03080, Korea;
| | - Ji-Yong Yoo
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Korea; (J.-Y.Y.); (S.-Y.W.)
| | - Sang-Yoon Woo
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Korea; (J.-Y.Y.); (S.-Y.W.)
| | - Hoon Joo Yang
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Korea
- Correspondence: (H.J.Y.); (W.-J.Y.)
| | - Jo-eun Kim
- Department of Oral and Maxillofacial Radiology, Seoul National University Dental Hospital, Seoul 03080, Korea;
| | - Kyung-Hoe Huh
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Korea; (K.-H.H.); (S.-S.L.); (M.-S.H.)
| | - Sam-Sun Lee
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Korea; (K.-H.H.); (S.-S.L.); (M.-S.H.)
| | - Min-Suk Heo
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Korea; (K.-H.H.); (S.-S.L.); (M.-S.H.)
| | - Soon Jung Hwang
- Hwang Soon Jung’s Dental Clinic for Oral and Maxillofacial Surgery, Seoul 06626, Korea;
| | - Won-Jin Yi
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Korea; (J.-Y.Y.); (S.-Y.W.)
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Korea; (K.-H.H.); (S.-S.L.); (M.-S.H.)
- Correspondence: (H.J.Y.); (W.-J.Y.)
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Yu HY. The question about the numerical value and quantitative data transfer of implant prosthodontics-orom experience guidance to digital guidance. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2021; 39:386-397. [PMID: 34409793 DOI: 10.7518/hxkq.2021.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The correct implant site design and placement are the basic clinical techniques that must be known for implant restoration. For a long time, most implants have been placed by free hands, and the choice of site is mostly dependent on the accumulation of long-term experience of the surgeon. The selection of implant site guided by this experience analogy logic is often based on the surgeon's level of experience,which often makes it very easy to produce complications related to the implant restoration of the incorrect site. In contrast, a clinical program using digital guidance and real-time measurable verification has emerged based on the restoration-oriented implantation concept, which marks the formation of an accurate, measurable and verifiable whole-process digital implant prototype. Furthermore, from the perspective of surveying, the numerical requirements that digital implant restoration relies on are actually incomplete to the four elements of measurement, which leading to the doubts about its authenticity. This article will question the numbers in implant restoration, and conduct a preliminary demonstration, and propose a new reliable actual measurement and verification method of the correct location and the numerical requirements of the restoration space and a new clinical program that relies on numbers from the perspective of the evolution of digital restoration, guided implantology and actual measurement technology. And this article further discusses the current mainstream implant restoration technology based on experience analogy which cannot effectively support the whole process of digital implant restoration and provides a new logical cognitive basis for the final realization of the entire process of digital implant restoration.
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Affiliation(s)
- Hai-Yang Yu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Grillo R. Orthognathic Surgery: A Bibliometric Analysis of the Top 100 Cited Articles. J Oral Maxillofac Surg 2021; 79:2339-2349. [PMID: 34245705 DOI: 10.1016/j.joms.2021.06.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/19/2021] [Accepted: 06/02/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE An increasing number of articles on orthognathic surgery are published every year. This paper aims to provide a list of the top 100 cited articles on orthognathic surgery to help any professional level with interest in this topic and to map the trends of orthognathic surgery publications over time. METHODS A bibliographic search (retrospective study) following STROBE guidelines was performed on Google Scholar (GS) and Dimensions with the term "orthognathic surgery" in the title, abstract, and keywords. The number of citations, citations per year, authors, and publication year were evaluated. A ranking was created in GS citations order with the top 100 cited articles and variables discussed individually. A graphical illustration of keywords was created using VOSviewer. These steps are fundamental in creating this list and relating it to all published articles on the topic. RESULTS A helpful list of the top 100 articles was developed to help professionals in entirely different manners. Virtual planning and complications in orthognathic surgery were the most cited topics, with a 95% confidence interval (P < .05). Some curiosities are discussed, such as increasing interest in surgery first and the relation between airway/obstructive sleep apnea and orthognathic surgery. CONCLUSIONS Bibliometric and altmetric analysis for free using Google Scholar and Dimensions is laborious but possible. Bibliometrics is a powerful tool to become actualized at any health professional level, from students to academics; and could save considerable effort and time for parties interested in the topic. Appropriate keywords are a crucial step to wider article dissemination.
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Affiliation(s)
- Ricardo Grillo
- Assistant Professor, Department of Oral & Maxillofacial Surgery, Faculdade São Leopoldo Mandic, Campinas, Brazil.
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Baan F, Bruggink R, Nijsink J, Maal TJJ, Ongkosuwito EM. Fusion of intra-oral scans in cone-beam computed tomography scans. Clin Oral Investig 2021; 25:77-85. [PMID: 32495223 PMCID: PMC7785548 DOI: 10.1007/s00784-020-03336-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/08/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the clinical accuracy of the fusion of intra-oral scans in cone-beam computed tomography (CBCT) scans using two commercially available software packages. MATERIALS AND METHODS Ten dry human skulls were subjected to structured light scanning, CBCT scanning, and intra-oral scanning. Two commercially available software packages were used to perform fusion of the intra-oral scans in the CBCT scan to create an accurate virtual head model: IPS CaseDesigner® and OrthoAnalyzer™. The structured light scanner was used as a gold standard and was superimposed on the virtual head models, created by IPS CaseDesigner® and OrthoAnalyzer™, using an Iterative Closest Point algorithm. Differences between the positions of the intra-oral scans obtained with the software packages were recorded and expressed in six degrees of freedom as well as the inter- and intra-observer intra-class correlation coefficient. RESULTS The tested software packages, IPS CaseDesigner® and OrthoAnalyzer™, showed a high level of accuracy compared to the gold standard. The accuracy was calculated for all six degrees of freedom. It was noticeable that the accuracy in the cranial/caudal direction was the lowest for IPS CaseDesigner® and OrthoAnalyzer™ in both the maxilla and mandible. The inter- and intra-observer intra-class correlation coefficient showed a high level of agreement between the observers. CLINICAL RELEVANCE IPS CaseDesigner® and OrthoAnalyzer™ are reliable software packages providing an accurate fusion of the intra-oral scan in the CBCT. Both software packages can be used as an accurate fusion tool of the intra-oral scan in the CBCT which provides an accurate basis for 3D virtual planning.
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Affiliation(s)
- F Baan
- Radboudumc 3DLab The Netherlands, Radboud university medical center, Radboud Institute for Health Sciences, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands.
- Department of Dentistry, section of Orthodontics and Craniofacial Biology, Radboud university medical center, Philips van Leydenlaan 25, 6525, EX, Nijmegen, The Netherlands.
| | - R Bruggink
- Radboudumc 3DLab The Netherlands, Radboud university medical center, Radboud Institute for Health Sciences, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands
- Department of Dentistry, section of Orthodontics and Craniofacial Biology, Radboud university medical center, Philips van Leydenlaan 25, 6525, EX, Nijmegen, The Netherlands
| | - J Nijsink
- Radboudumc 3DLab The Netherlands, Radboud university medical center, Radboud Institute for Health Sciences, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands
| | - T J J Maal
- Radboudumc 3DLab The Netherlands, Radboud university medical center, Radboud Institute for Health Sciences, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands
- Department of Oral and Maxillofacial Surgery, Radboud university medical center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands
| | - E M Ongkosuwito
- Department of Dentistry, section of Orthodontics and Craniofacial Biology, Radboud university medical center, Philips van Leydenlaan 25, 6525, EX, Nijmegen, The Netherlands
- Amalia Cleft and Craniofacial Centre, Radboud university medical centre, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands
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房 硕, 杨 广, 康 艳, 孙 玉, 谢 秋. [Method and accuracy of determining the jaw position of repositioning splint with the aid of digital technique]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2020; 53:76-82. [PMID: 33550339 PMCID: PMC7867963 DOI: 10.19723/j.issn.1671-167x.2021.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Indexed: 06/12/2023]
Abstract
OBJECTIVE To establish the workflow of determining the jaw position of repositioning splint with the aid of digital technique, and to evaluate the accuracy of this workflow and compare the accuracy of raising different vertical dimensions in vitro. METHODS A volunteer was recruited. The data of full-arch scans, cone beam computed tomography (CBCT) image and ultrasonic jaw motion tracking of the volunteer were acquired. The full-arch scans were merged with the CBCT image, which were then matched to the jaw motion tracking reference system. The jaw position of repositioning splint was determined when the anterior teeth opening was 3 mm and the condyle was in centric relation of the fossa in the sagittal plane. A digital repositioning splint was designed in the software based on virtual articulator and fabricated with additive manufacturing technique. After the splint was tried in, another CBCT image was taken and a qualitative analysis was conducted to compare the position of condyle between these two CBCT images. In the in vitro study, standard dental plaster casts with resin ball markers attached to the base were mounted onto a fully adjustable articulator in the intercuspal position. The dental casts were scanned by an extraoral scanner to establish digital models. The ultrasonic jaw motion tracking device was used to obtain simulated jaw movements on the articulator, which was repeated for three times. The digital models and data of jaw movements were merged in one coordination with the aid of bite forks. The jaw position of repositioning splint was determined by adjusting data of jaw movements, each of which was used to determine three vertical jaw positions 4 mm, 5 mm, and 6 mm with the horizontal jaw position of protrusion 2 mm. The virtual articulators with differently adjusted jaw movements were applied in designing repositioning splints, and the final repositioning splints and virtual jaw relationships were exported in STL format. Then the repositioning splints were fabricated with additive manufacturing technique and tried in plaster casts on the mechanical articulator, which were scanned and the jaw relationships on the mechanical articulator were exported later. The virtual jaw relationships and scanned jaw relationships were registered according to lower models and displacement of upper models was calculated. Ball markers were fit to acquire the coordinates of centers and absolute difference values of centers along three coordinating axes X, Y, and Z were calculated. One-way analysis of variance was conducted using SPSS 18.0 software to compare deviations of the three different vertical jaw relationships in two-side test and the significance level was 0.05. RESULTS With the aid of multi-source data fusion and individualized jaw motion, the clinical workflow of determining jaw position of repositioning splint was preliminarily established. The designed jaw position was realized on the right and the condyle was more inferior than the designed position on the left. Both displacement of the upper models and absolute difference values of centers showed no significant differences (P>0.05) in different vertical jaw dimensions. The displacement of the upper models was (0.25±0.04) mm. The absolute difference values of centers along the three coordinating axes X, Y, and Z were respectively (0.08±0.01) mm, (0.30±0.02) mm, and (0.21±0.04) mm. CONCLUSION A novel method of determining the jaw position of repositioning splint with the aid of digital technique is established. It is proved to be feasible by try-in after multi-data fusion, computer-aided design and computer-aided manufacturing. As is shown in vitro, it is accurate to apply this method in adjusting jaw position. Further clinical trial will be designed to evaluate its clinical effect.
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Affiliation(s)
- 硕博 房
- 北京大学口腔医学院·口腔医院,修复科 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
- 北京大学口腔医学院·口腔医院,口颌功能诊疗研究中心 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Center for Oral and Jaw Functional Diagnosis, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - 广聚 杨
- 北京大学口腔医学院·口腔医院,修复科 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
- 北京大学口腔医学院·口腔医院,口颌功能诊疗研究中心 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Center for Oral and Jaw Functional Diagnosis, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - 艳凤 康
- 北京大学口腔医学院·口腔医院,修复科 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
- 北京大学口腔医学院·口腔医院,口颌功能诊疗研究中心 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Center for Oral and Jaw Functional Diagnosis, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - 玉春 孙
- 北京大学口腔医学院·口腔医院,修复科 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - 秋菲 谢
- 北京大学口腔医学院·口腔医院,修复科 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
- 北京大学口腔医学院·口腔医院,口颌功能诊疗研究中心 国家口腔疾病临床医学研究中心 口腔数字化医疗技术和材料国家工程实验室 口腔数字医学北京市重点实验室,北京 100081Center for Oral and Jaw Functional Diagnosis, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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A dual scan approach to creating an accurate dental surface for virtual implant planning: A dental technique. J Prosthet Dent 2020; 126:464-470. [PMID: 32972712 DOI: 10.1016/j.prosdent.2020.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 06/22/2020] [Accepted: 06/22/2020] [Indexed: 11/23/2022]
Abstract
Artifacts from metal restorations can make it challenging or impossible to accurately orient a digital dental cast to cone beam computed tomography (CBCT) scan data for virtual implant planning. A dual scan technique is described that uses an alginate impression with fiducial markers in a stock tray to create a digital dental cast that is precisely oriented to the scan in the same patient coordinate system for surgical guide design.
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Park JH, Hwang CJ, Choi YJ, Houschyar KS, Yu JH, Bae SY, Cha JY. Registration of digital dental models and cone-beam computed tomography images using 3-dimensional planning software: Comparison of the accuracy according to scanning methods and software. Am J Orthod Dentofacial Orthop 2020; 157:843-851. [PMID: 32487314 DOI: 10.1016/j.ajodo.2019.12.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 12/01/2019] [Accepted: 12/01/2019] [Indexed: 01/22/2023]
Abstract
INTRODUCTION The registration of cone-beam computed tomography (CBCT) images and digital dental models is required for the design and manufacturing of dental devices such as implant guides and surgical wafers. This study aims to register intraoral scan (IS) models and cast scan (CS) models onto CBCT images using 3-dimensional (3D) planning software and evaluate the registration accuracy according to scanning methods and 3D planning software. METHODS The CBCT image of an artificial skull model with reference markers was taken. The CS model and the IS model were obtained from the same skull model, registered onto the CBCT image using 3D planning software packages providing manual registration (MR) function and point-based registration (PR) functions, and set as the experimental groups. After registration, shell to shell deviations and positional differences between the reference model and the experimental models were evaluated. RESULTS The shell to shell deviations ranged from 0.03 to 0.18 mm. Deviations in both the maxilla and mandible were significantly different according to scanning methods and software packages. In the anteroposterior direction, the IS-MR and CS-MR groups showed significantly different positions. In the superoinferior direction, the MR and PR groups showed significantly different positions. CONCLUSIONS The registration using the PR function of the 3D planning software packages was significantly more accurate than the registration using the MR function. There was no significant difference between the registrations using the IS model and the CS model when using the PR functions.
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Affiliation(s)
- Jin-Ho Park
- Department of Orthodontics, Institute of Craniofacial Deformities, Yonsei University College of Dentistry, Seoul, South Korea
| | - Chung-Ju Hwang
- Department of Orthodontics, Institute of Craniofacial Deformities, Yonsei University College of Dentistry, Seoul, South Korea
| | - Yoon-Jeong Choi
- Department of Orthodontics, Institute of Craniofacial Deformities, Yonsei University College of Dentistry, Seoul, South Korea
| | - Khosrow Siamak Houschyar
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Jae-Hun Yu
- Department of Orthodontics, Institute of Craniofacial Deformities, Yonsei University College of Dentistry, Seoul, South Korea; BK PLUS project, Yonsei University College of Dentistry, Seoul, South Korea
| | - So-Yeon Bae
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, South Korea
| | - Jung-Yul Cha
- Department of Orthodontics, Institute of Craniofacial Deformities, Yonsei University College of Dentistry, Seoul, South Korea; BK PLUS project, Yonsei University College of Dentistry, Seoul, South Korea.
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Chang YJ, Lai JP, Tsai CY, Wu TJ, Lin SS. Accuracy assessment of computer-aided three-dimensional simulation and navigation in orthognathic surgery (CASNOS). J Formos Med Assoc 2020; 119:701-711. [DOI: 10.1016/j.jfma.2019.09.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 09/19/2019] [Accepted: 09/27/2019] [Indexed: 11/27/2022] Open
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Jamjoom FZ, Yilmaz B, Johnston WM. Impact of number of registration points on the positional accuracy of a prosthetic treatment plan incorporated into a cone beam computed tomography scan by surface scan registration: An in vitro study. Clin Oral Implants Res 2019; 30:826-832. [PMID: 31161678 DOI: 10.1111/clr.13490] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 04/05/2019] [Accepted: 05/30/2019] [Indexed: 01/05/2023]
Abstract
OBJECTIVES To evaluate the accuracy of a prosthetic treatment plan incorporation into a cone beam computed tomography (CBCT) scan using point-based registration with three registration points selected and to evaluate the impact of number of registration points on prosthetic plan accuracy. MATERIAL AND METHODS A CBCT scan of a completely dentate master model with removable teeth was exposed after removing the mandibular left first premolar, second premolar, and first molar. A digital scan of the master model with all teeth present was made by scanning a stone replica using a laboratory scanner. The digital model was registered onto the three-dimensional (3D) volume rendering of the CBCT scan using implant planning software. The point-based registration was repeated using three, four, five, six, seven, eight, nine, and 10 reference points. Metrology software was used to measure the 3D deviation of the registered models for each reference point group on standard tessellation language (STL) files obtained from the CBCT scans. An STL file of the master model with all teeth present obtained from another CBCT scan was used as reference. RESULTS Using three registration points, the registered prosthetic plan had a mean absolute deviation of 17.63 µm from the reference. Increasing the number of registration points failed to demonstrate statistically significant effects on the deviation (p > 0.05). CONCLUSIONS For this clinical scenario, three registration points provided adequate accuracy for prosthetic plan incorporation into CBCT scans. Increasing the number of registration points had no significant impact on the prosthetic plan accuracy in this study.
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Affiliation(s)
- Faris Z Jamjoom
- Advanced Graduate Program in Implant Dentistry, Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Boston, Massachusetts
| | - Burak Yilmaz
- Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio
| | - William M Johnston
- Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio
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Tsuchida Y, Takahashi H, Watanabe H, Oki M, Shiozawa M, Kurabayashi T, Suzuki T. Effects of number of metal restorations and mandibular position during computed tomography imaging on accuracy of maxillofacial models. J Prosthodont Res 2019; 63:239-244. [DOI: 10.1016/j.jpor.2018.12.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 12/10/2018] [Accepted: 12/12/2018] [Indexed: 10/27/2022]
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Kang SH, Kim CS, Lee JY. Digital setting of postoperative planned occlusion using occlusal contact points on a dental cast model in digital maxillofacial surgery. Oral Radiol 2019; 36:307-312. [PMID: 30756219 DOI: 10.1007/s11282-019-00371-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 01/12/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVES This study analyzed the accuracy of digital occlusion settings for maxillofacial surgery simulation using occlusal contact points obtained from dental cast models. METHODS Twenty-nine paired dental cast models of patients were used. The orthodontist set the dental cast for postoperative planned occlusion in the articulator. In the experimental group, a digital dental cast was placed in the occlusion state between the maxillary cast and the mandibular cast by the paired points matching method according to the more than four paired occlusal contact points. In the control group, the obtained digital dental cast data and occlusal lateral surface scan data were used to create maxillary and mandibular digital occlusions of the dental cast. RESULTS Significantly greater error occurred when occlusion was set based on paired points matched by occlusal contact points than when direct intraoral scanning was used. CONCLUSIONS This paired points matching method may be considered an alternative in cases in which superimposition using occlusal surfaces or the external surface of dental cast models is difficult in the clinical setting. However, the occlusal surface-based method for digital dental casts is recommended for digital planned occlusion in maxillofacial simulation.
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Affiliation(s)
- Sang-Hoon Kang
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro, Ilsan-donggu, Goyang, Gyeonggi-do, 10444, Republic of Korea
| | - Chan-Seung Kim
- Department of Orthodontics, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro, Ilsan-donggu, Goyang, Gyeonggi-do, 10444, Republic of Korea
| | - Ji-Yeon Lee
- Department of Orthodontics, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro, Ilsan-donggu, Goyang, Gyeonggi-do, 10444, Republic of Korea.
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Kim JE, Park JH, Kim JH, Shim JS. Computer-based implant planning involving a prefabricated custom tray with alumina landmark structures. J Prosthet Dent 2018; 121:373-377. [PMID: 30409722 DOI: 10.1016/j.prosdent.2018.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/31/2018] [Accepted: 06/01/2018] [Indexed: 11/17/2022]
Abstract
The purpose of this technical report was to describe a method for the fabrication of a custom tray with landmark structures to coordinate cone beam computed tomography and scan data for use in guided implant surgery in patients with numerous artifact-causing metal prostheses. The fabricated custom tray can be used to coordinate cone beam computed tomography data and scan data from the dentition, as well as to fabricate the prostheses.
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Affiliation(s)
- Jong-Eun Kim
- Clinical Assistant Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Ji-Hyun Park
- Graduate student, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Jee-Hwan Kim
- Associate Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - June-Sung Shim
- Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
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Lee SJ, Yang HJ, Choi MH, Woo SY, Huh KH, Lee SS, Heo MS, Choi SC, Hwang SJ, Yi WJ. Real-time augmented model guidance for mandibular proximal segment repositioning in orthognathic surgery, using electromagnetic tracking. J Craniomaxillofac Surg 2018; 47:127-137. [PMID: 30447987 DOI: 10.1016/j.jcms.2018.10.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 09/17/2018] [Accepted: 10/18/2018] [Indexed: 10/28/2022] Open
Abstract
It is essential to reposition the mandibular proximal segment (MPS) as close to its original position as possible during orthognathic surgery. Conventional methods cannot pinpoint the exact position of the condyle in the fossa in real time during repositioning. In this study, based on an improved registration method and a separable electromagnetic tracking tool, we developed a real-time, augmented, model-guided method for MPS surgery to reposition the condyle into its original position more accurately. After virtual surgery planning, using a complex maxillomandibular model, the final position of the virtual MPS model was simulated via 3D rotations. The displacements resulting from the MPS simulation were applied to the MPS landmarks to indicate their final postoperative positions. We designed a new registration body with 24 fiducial points for registration, and determined the optimal point group on the registration body through a phantom study. The registration between the patient's CT image and physical spaces was performed preoperatively using the optimal points. We also developed a separable frame for installing the electromagnetic tracking tool on the patient's MPS. During MPS surgery, the electromagnetic tracking tool was repeatedly attached to, and separated from, the MPS using the separable frame. The MPS movement resulting from the surgeon's manipulation was tracked by the electromagnetic tracking system. The augmented condyle model and its landmarks were visualized continuously in real time with respect to the simulated model and landmarks. Our method also provides augmented 3D coronal and sagittal views of the fossa and condyle, to allow the surgeon to examine the 3D condyle-fossa positional relationship more accurately. The root mean square differences between the simulated and intraoperative MPS models, and between the simulated and postoperative CT models, were 1.71 ± 0.63 mm and 1.89 ± 0.22 mm respectively at three condylar landmarks. Thus, the surgeons could perform MPS repositioning conveniently and accurately based on real-time augmented model guidance on the 3D condyle positional relationship with respect to the glenoid fossa, using augmented and simulated models and landmarks.
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Affiliation(s)
- Sang-Jeong Lee
- Department of Biomedical Radiation Sciences (Head: Sung-Joon Ye, PhD), Graduate School of Convergence Science and Technology, Seoul National University, South Korea
| | - Hoon Joo Yang
- Orthognathic Surgery Center (Head: Soon Jung Hwang, DDS, MD, PhD), Seoul National University Dental Hospital, South Korea
| | - Min-Hyuk Choi
- Department of Biomedical Radiation Sciences (Head: Sung-Joon Ye, PhD), Graduate School of Convergence Science and Technology, Seoul National University, South Korea
| | - Sang-Yoon Woo
- Department of Biomedical Radiation Sciences (Head: Sung-Joon Ye, PhD), Graduate School of Convergence Science and Technology, Seoul National University, South Korea
| | - Kyung-Hoe Huh
- Department of Oral and Maxillofacial Radiology (Head: Min-Suk Heo, DDS, PhD), School of Dentistry and Dental Research Institute, Seoul National University, South Korea
| | - Sam-Sun Lee
- Department of Oral and Maxillofacial Radiology (Head: Min-Suk Heo, DDS, PhD), School of Dentistry and Dental Research Institute, Seoul National University, South Korea
| | - Min-Suk Heo
- Department of Oral and Maxillofacial Radiology (Head: Min-Suk Heo, DDS, PhD), School of Dentistry and Dental Research Institute, Seoul National University, South Korea
| | - Soon-Chul Choi
- Department of Oral and Maxillofacial Radiology (Head: Min-Suk Heo, DDS, PhD), School of Dentistry and Dental Research Institute, Seoul National University, South Korea
| | - Soon Jung Hwang
- Department of Oral and Maxillofacial Surgery (Head: Jin-Young Choi, DDS, MD, PhD), School of Dentistry, Dental Research Institute, BK21 Plus, Seoul National University, South Korea.
| | - Won-Jin Yi
- Department of Biomedical Radiation Sciences (Head: Sung-Joon Ye, PhD), Graduate School of Convergence Science and Technology, Seoul National University, South Korea; Department of Oral and Maxillofacial Radiology (Head: Min-Suk Heo, DDS, PhD), School of Dentistry and Dental Research Institute, Seoul National University, South Korea.
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Jamjoom FZ, Kim DG, McGlumphy EA, Lee DJ, Yilmaz B. Positional accuracy of a prosthetic treatment plan incorporated into a cone beam computed tomography scan using surface scan registration. J Prosthet Dent 2018; 120:367-374. [PMID: 29703673 DOI: 10.1016/j.prosdent.2017.11.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 11/01/2017] [Accepted: 11/02/2017] [Indexed: 10/17/2022]
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A Method for Tooth Model Reconstruction Based on Integration of Multimodal Images. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2018:4950131. [PMID: 30026903 PMCID: PMC6031084 DOI: 10.1155/2018/4950131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 05/07/2018] [Indexed: 12/02/2022]
Abstract
A complete digital tooth model is needed for computer-aided orthodontic treatment. However, current methods mainly use computed tomography (CT) images to reconstruct the tooth model which may require multiple CT scans during orthodontic progress, and the reconstructed model is also inaccurate in crown area. This study developed a tooth model reconstruction method based on integration of CT images and laser scan images to overcome these disadvantages. In the method, crown models and complete tooth models are first reconstructed, respectively, from laser scan images and CT images. Then, crown models from laser scan images and tooth models from CT images are registered. Finally, the crown from laser scan images and root from CT images were fused to obtain a new tooth model. Experimental results verified that the developed method is effective to generate the complete tooth model by integrating CT images and laser scan images. Using the proposed method, the reconstructed models provide more accurate crown than CT images, and it is feasible to obtain complete tooth models at any stage of orthodontic treatment by using one CT scan at the pretreatment stage and one laser scan at that stage to avoid multiple CT scans.
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Registration area and accuracy when integrating laser-scanned and maxillofacial cone-beam computed tomography images. Am J Orthod Dentofacial Orthop 2018; 153:355-361. [PMID: 29501110 DOI: 10.1016/j.ajodo.2017.06.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 06/01/2017] [Accepted: 06/01/2017] [Indexed: 11/23/2022]
Abstract
INTRODUCTION The purpose of this study was to examine changes in registration accuracy after including occlusal surface and incisal edge areas in addition to the buccal surface when integrating laser-scanned and maxillofacial cone-beam computed tomography (CBCT) dental images. METHODS CBCT scans and maxillary dental casts were obtained from 30 patients. Three methods were used to integrate the images: R1, only the buccal and labial surfaces were used; R2, the incisal edges of the anterior teeth and the buccal and distal marginal ridges of the second molars were used; and R3, labial surfaces, including incisal edges of anterior teeth, and buccal surfaces, including buccal and distal marginal ridges of the second molars, were used. Differences between the 2 images were evaluated by color-mapping methods and average surface distances by measuring the 3-dimensional Euclidean distances between the surface points on the 2 images. RESULTS The R1 method showed more discrepancies between the laser-scanned and CBCT images than did the other methods. The R2 method did not show a significant difference in registration accuracy compared with the R3 method. CONCLUSIONS The results of this study indicate that accuracy when integrating laser-scanned dental images into maxillofacial CBCT images can be increased by including occlusal surface and incisal edge areas as registration areas.
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Replacement of the Distorted Dentition of the Cone-Beam Computed Tomography Scans for Orthognathic Surgery Planning. J Oral Maxillofac Surg 2018; 76:1561.e1-1561.e8. [PMID: 29572134 DOI: 10.1016/j.joms.2018.02.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 02/13/2018] [Accepted: 02/16/2018] [Indexed: 10/17/2022]
Abstract
PURPOSE Cone-beam computed tomography (CBCT) does not record dental morphology accurately because of the scattering produced by metallic restorations and the reported magnification of the dentition. The aim of this study was the development and evaluation of a new method for the replacement of the distorted dentition of CBCT scans with a 3-dimensional (3D) dental image captured by a digital intraoral camera. MATERIALS AND METHODS Six dried skulls with orthodontic brackets fixed on the teeth were used in this study. Three intraoral markers made of dental stone were constructed and attached to orthodontic brackets. The skulls were scanned by CBCT and the occlusal surfaces were captured using the TRIOS 3D intraoral scanner. The digital intraoral scan (IOS) was fused into the CBCT models. This produced a new composite digital model of the skull and the dentition. The skulls were scanned again using the commercially accurate Faro laser arm to produce the 3D model the skull and teeth gold standard for the assessment of the accuracy of the developed method. This was assessed by measuring the distance between the occlusal surfaces of the new composite model and the gold standard 3D laser produced model. RESULTS The results showed the errors related to the superimposition of the intraoral image on the CBCT to replace the distorted dentition were 0.11 to 0.20 mm. CONCLUSION The results of this novel method suggest that the dentition on the CBCT scan can be accurately replaced with the digital IOS image captured by an intraoral scanner to create a composite model that will improve the accuracy of digital orthognathic surgical planning and the fabrication of the guiding occlusal wafer.
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Jamjoom FZ, Kim DG, Lee DJ, McGlumphy EA, Yilmaz B. Effect of length and location of edentulous area on the accuracy of prosthetic treatment plan incorporation into cone-beam computed tomography scans. Clin Implant Dent Relat Res 2018; 20:300-307. [PMID: 29399999 DOI: 10.1111/cid.12582] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 12/22/2017] [Accepted: 12/22/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Faris Z. Jamjoom
- Advanced Graduate Program in Implant Dentistry, Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine; Boston Massachusetts
- Division of Restorative Sciences and Prosthodontics; The Ohio State University College of Dentistry; Columbus Ohio
| | - Do-Gyoon Kim
- Division of Orthodontics; The Ohio State University College of Dentistry; Columbus Ohio
| | - Damian J. Lee
- Division of Restorative Sciences and Prosthodontics; The Ohio State University College of Dentistry; Columbus Ohio
| | - Edwin A. McGlumphy
- Division of Restorative Sciences and Prosthodontics; The Ohio State University College of Dentistry; Columbus Ohio
| | - Burak Yilmaz
- Division of Restorative Sciences and Prosthodontics; The Ohio State University College of Dentistry; Columbus Ohio
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Rangel FA, Maal TJJ, de Koning MJJ, Bronkhorst EM, Bergé SJ, Kuijpers-Jagtman AM. Integration of digital dental casts in cone beam computed tomography scans-a clinical validation study. Clin Oral Investig 2017; 22:1215-1222. [PMID: 28932947 PMCID: PMC5866842 DOI: 10.1007/s00784-017-2203-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 09/04/2017] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Images derived from cone beam computed tomography (CBCT) scans lack detailed information on the dentition and interocclusal relationships needed for proper surgical planning and production of surgical splints. To get a proper representation of the dentition, integration of a digital dental model into the CBCT scan is necessary. The aim of this study was to validate a simplified protocol to integrate digital dental models into CBCT scans using only one scan. MATERIALS AND METHODS Conventional protocol A used one combined upper and lower impression and two CBCT scans. The new protocol B included placement of ten markers on the gingiva, one CBCT scan, and two separate impressions of the upper and lower dentition. Twenty consecutive patients, scheduled for mandibular advancement surgery, were included. To validate protocol B, 3-dimensional reconstructions were made, which were compared by calculating the mean intersurface distances obtained with both protocols. RESULTS The mean distance for all patients for the upper jaw is 0.39 mm and for the lower jaw is 0.30 mm. For ten out of 20 patients, all distances were less than 1 mm. For the other ten patients, all distances were less than 2 mm. CONCLUSIONS Mean distances of 0.39 and 0.30 mm are clinically acceptable and comparable to other studies; therefore, this new protocol is clinically accurate. CLINICAL RELEVANCE This new protocol seems to be clinically accurate. It is less time consuming, gives less radiation exposure for the patient, and has a lower risk for positional errors of the impressions compared to other integration protocols.
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Affiliation(s)
- Frits A Rangel
- Department of Orthodontics and Craniofacial Biology, Radboud University Medical Centre, 309 Dentistry, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Thomas J J Maal
- Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Martien J J de Koning
- Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Ewald M Bronkhorst
- Department of Preventive and Restorative Dentistry, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Stefaan J Bergé
- Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Anne Marie Kuijpers-Jagtman
- Department of Orthodontics and Craniofacial Biology, Radboud University Medical Centre, 309 Dentistry, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.
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Chin SJ, Wilde F, Neuhaus M, Schramm A, Gellrich NC, Rana M. Accuracy of virtual surgical planning of orthognathic surgery with aid of CAD/CAM fabricated surgical splint-A novel 3D analyzing algorithm. J Craniomaxillofac Surg 2017; 45:1962-1970. [PMID: 29066041 DOI: 10.1016/j.jcms.2017.07.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 05/31/2017] [Accepted: 07/24/2017] [Indexed: 10/19/2022] Open
Abstract
The benefit of computer-assisted planning in orthognathic surgery has been extensively documented over the last decade. This study aims to evaluate the accuracy of a virtual orthognathic surgical plan by a novel three dimensional (3D) analysis method. Ten patients who required orthognathic surgery were included in this study. A virtual surgical plan was achieved by the combination of a 3D skull model acquired from computed tomography (CT) and surface scanning of the upper and lower dental arch respectively and final occlusal position. Osteotomies and movement of maxilla and mandible were simulated by Dolphin Imaging 11.8 Premium® (Dolphin Imaging and Management Solutions, Chatsworth, CA). The surgical plan was transferred to surgical splints fabricated by means of Computer Aided Design/Computer Aided Manufacturing (CAD/CAM). Differences of three dimensional measurements between the virtual surgical plan and postoperative results were evaluated. The results from all parameters showed that the virtual surgical plans were successfully transferred by the assistance of CAD/CAM fabricated surgical splint. Wilcoxon's signed rank test showed that no statistically significant deviation between surgical plan and post-operational result could be detected. However, deviation of angle U1 axis-HP and distance of A-CP could not fulfill the clinical success criteria. Virtual surgical planning and CAD/CAM fabricated surgical splint are proven to facilitate treatment planning and offer an accurate surgical result in orthognathic surgery.
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Affiliation(s)
- Shih-Jan Chin
- Department of Craniomaxillofacial Surgery, Hannover Medical School, Germany
| | - Frank Wilde
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, Military Hospital Ulm and Academic Hospital University, Ulm, Germany
| | - Michael Neuhaus
- Department of Craniomaxillofacial Surgery, Hannover Medical School, Germany
| | - Alexander Schramm
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, Military Hospital Ulm and Academic Hospital University, Ulm, Germany
| | | | - Majeed Rana
- Department of Craniomaxillofacial Surgery, Hannover Medical School, Germany.
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Comparison of digital dental images yielded by digital dental casts, cone-beam computed tomography, and multislice computed tomography for measurement of dental area. Oral Radiol 2016. [DOI: 10.1007/s11282-016-0242-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lee SJ, Woo SY, Huh KH, Lee SS, Heo MS, Choi SC, Han JJ, Yang HJ, Hwang SJ, Yi WJ. Virtual skeletal complex model- and landmark-guided orthognathic surgery system. J Craniomaxillofac Surg 2016; 44:557-68. [PMID: 27012762 DOI: 10.1016/j.jcms.2016.02.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 01/30/2016] [Accepted: 02/19/2016] [Indexed: 11/26/2022] Open
Abstract
In this study, correction of the maxillofacial deformities was performed by repositioning bone segments to an appropriate location according to the preoperative planning in orthognathic surgery. The surgery was planned using the patient's virtual skeletal models fused with optically scanned three-dimensional dentition. The virtual maxillomandibular complex (MMC) model of the patient's final occlusal relationship was generated by fusion of the maxillary and mandibular models with scanned occlusion. The final position of the MMC was simulated preoperatively by planning and was used as a goal model for guidance. During surgery, the intraoperative registration was finished immediately using only software processing. For accurate repositioning, the intraoperative MMC model was visualized on the monitor with respect to the simulated MMC model, and the intraoperative positions of multiple landmarks were also visualized on the MMC surface model. The deviation errors between the intraoperative and the final positions of each landmark were visualized quantitatively. As a result, the surgeon could easily recognize the three-dimensional deviation of the intraoperative MMC state from the final goal model without manually applying a pointing tool, and could also quickly determine the amount and direction of further MMC movements needed to reach the goal position. The surgeon could also perform various osteotomies and remove bone interference conveniently, as the maxillary tracking tool could be separated from the MMC. The root mean square (RMS) difference between the preoperative planning and the intraoperative guidance was 1.16 ± 0.34 mm immediately after repositioning. After surgery, the RMS differences between the planning and the postoperative computed tomographic model were 1.31 ± 0.28 mm and 1.74 ± 0.73 mm for the maxillary and mandibular landmarks, respectively. Our method provides accurate and flexible guidance for bimaxillary orthognathic surgery based on intraoperative visualization and quantification of deviations for simulated postoperative MMC and landmarks. The guidance using simulated skeletal models and landmarks can complement and improve conventional navigational surgery for bone repositioning in the craniomaxillofacial area.
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Affiliation(s)
- Sang-Jeong Lee
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Sang-Yoon Woo
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Kyung-Hoe Huh
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Sam-Sun Lee
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Min-Suk Heo
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Soon-Chul Choi
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Jeong Joon Han
- Department of Oral and Maxillofacial Surgery, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Hoon Joo Yang
- Department of Oral and Maxillofacial Surgery, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea
| | - Soon Jung Hwang
- Department of Oral and Maxillofacial Surgery, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea.
| | - Won-Jin Yi
- Department of Oral and Maxillofacial Radiology, BK21, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea.
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de Waard O, Baan F, Verhamme L, Breuning H, Kuijpers-Jagtman AM, Maal T. A novel method for fusion of intra-oral scans and cone-beam computed tomography scans for orthognathic surgery planning. J Craniomaxillofac Surg 2016; 44:160-6. [DOI: 10.1016/j.jcms.2015.11.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 11/10/2015] [Accepted: 11/25/2015] [Indexed: 10/22/2022] Open
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Dimensional accuracy of digital dental models from cone-beam computed tomography scans of alginate impressions according to time elapsed after the impressions. Am J Orthod Dentofacial Orthop 2016; 149:287-94. [PMID: 26827986 DOI: 10.1016/j.ajodo.2015.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 08/01/2015] [Accepted: 08/01/2015] [Indexed: 11/23/2022]
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Abstract
In traditional virtual 3D orthognathic surgery, after repositioning the maxillary segment to the desired position, surgeons usually roughly rotate or adjust the mandibular segment to obtain a relatively good relationship with maxillary dentition to calculate the virtual terminal occlusion splint. However, surgeons are not easy to avoid penetrability, overlap, or an overly large space existing between the maxillary and mandibular dentitions during this process. The present report offered a new method to obtain a suitable virtual terminal occlusal splint that could avoid penetrability, overlap, or an overly large space between the maxillary and mandibular dentitions, and simultaneously accurately moving the maxillary or mandibular segment to the desired position utilizing the planned terminal occlusion plaster models in virtual orthognathic surgery. For double jaw surgery, after aligning the planned plaster models to the 3D maxilla and mandible, we could simultaneously move the maxillary and mandibular segment as a whole that maintain the planned terminal occlusion to the desired position. This present method may enhance the accuracy of 3D virtual orthognathic surgery and save plenty of time spend on virtual surgery simulation, which also offers a useful educational method for training junior surgeons and students.
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Yang WM, Ho CT, Lo LJ. Automatic Superimposition of Palatal Fiducial Markers for Accurate Integration of Digital Dental Model and Cone Beam Computed Tomography. J Oral Maxillofac Surg 2015; 73:1616.e1-10. [PMID: 25957873 DOI: 10.1016/j.joms.2015.04.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/22/2015] [Accepted: 04/06/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE Obtaining a detailed dentition image is important for 3-dimensional orthognathic surgical simulation. The purpose of the present study was to evaluate the accuracy of a method using automatic superimposition of intraoral fiducial markers for integrating the digital dental model with the cone beam computed tomography (CBCT) scan. PATIENTS AND METHODS A preliminary test was performed on a plastic skull model for the proper selection of the size and number of the fiducial markers fixed to the palatal plate. Five patients were enrolled in the present study. Plaster dental models were taken and scanned. Integration of the upper dental and occlusion dental image with the CBCT scan was performed by superimposition of the markers. The occlusion dental image was used to connect the lower dental image and the corresponding position of the CBCT mandibular dentition. The root mean square difference (RMSD) was used to evaluate the accuracy of fiducial marker superimposition, and the Euclidean distances were measured between 2 occlusion surfaces to evaluate the registration accuracy. RESULTS The RMSD was less than 0.13 mm in the superimposition of fiducial markers, and the Euclidean distance was less than 0.28 mm in the occlusal surface deviation. The results showed high accuracy on integration. The patients reported good tolerance to the markers. CONCLUSION This superimposition method provided high accuracy for the replacement of dentition using CBCT and was patient- and user-friendly for clinical application.
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Affiliation(s)
- Wei-Min Yang
- Attending Staff, Department of Dentistry, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Cheng-Ting Ho
- Assistant Professor, Department of Orthodontics, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Lun-Jou Lo
- Professor, Department of Plastic and Reconstructive Surgery, and Craniofacial Research Center, and Chairman, Department of Surgery, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan.
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Uechi J, Tsuji Y, Konno M, Hayashi K, Shibata T, Nakayama E, Mizoguchi I. Generation of virtual models for planning orthognathic surgery using a modified multimodal image fusion technique. Int J Oral Maxillofac Surg 2015; 44:462-9. [DOI: 10.1016/j.ijom.2014.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 07/29/2014] [Accepted: 11/07/2014] [Indexed: 11/16/2022]
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Lin HH, Lo LJ. Three-dimensional computer-assisted surgical simulation and intraoperative navigation in orthognathic surgery: a literature review. J Formos Med Assoc 2015; 114:300-7. [PMID: 25744942 DOI: 10.1016/j.jfma.2015.01.017] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 01/26/2015] [Accepted: 01/31/2015] [Indexed: 10/23/2022] Open
Abstract
By incorporating three-dimensional (3D) imaging and computer-aided design and manufacturing techniques, 3D computer-assisted technology has been applied widely to provide accurate guidance for assessment and treatment planning in clinical practice. This technology has recently been used in orthognathic surgery to improve surgical planning and outcome. The modality will gradually become popular. This study reviewed the literature concerning the use of computer-assisted techniques in orthognathic surgery including surgical planning, simulation, intraoperative translation of the virtual surgery, and postoperative evaluation. A Medline, PubMed, ProQuest, and ScienceDirect search was performed to find relevant articles with regard to 3D computer-assisted orthognathic surgery in the past 10 years. A total of 460 articles were revealed, out of which 174 were publications addressed the topic of this study. The purpose of this article is to present an overview of the state-of-art methods for 3D computer-assisted technology in orthognathic surgery. From the review we can conclude that the use of computer-assisted technique in orthognathic surgery provides the benefit of optimal functional and aesthetic results, patient satisfaction, precise translation of the treatment plan, and facilitating intraoperative manipulation.
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Affiliation(s)
- Hsiu-Hsia Lin
- Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
| | - Lun-Jou Lo
- Plastic and Reconstructive Surgery, and Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan.
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Raschke GF, Rieger UM, Peisker A, Djedovic G, Gomez-Dammeier M, Guentsch A, Schaefer O, Schultze-Mosgau S. Morphologic outcome of bimaxillary surgery--an anthropometric appraisal. Med Oral Patol Oral Cir Bucal 2015; 20:e103-10. [PMID: 25475769 PMCID: PMC4320412 DOI: 10.4317/medoral.19978] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 06/17/2014] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To adequately perform orthognathic surgery procedures, it is from basic interest to understand the morphologic changes caused by orthognathic surgery. Anthropometric analyses of standardized frontal view and profile photographs could help to investigate and understand such changes. STUDY DESIGN We present a pre- to postoperative evaluation of orthognathic surgery results based on anthropometric indices described by Farkas and cephalometric measurements. 30 Class III patients undergoing maxillary advancement by Le Fort I Osteotomy and mandibular setback by bilateral sagittal split osteotomy were evaluated. Preoperative as well as three and nine months postoperative lateral cephalograms as well as standardized frontal view and profile photographs were taken. On the photographs 21 anthropometric indices given by Farkas were evaluated. In cephalograms SNA and SNB angle as well as Wits appraisal were investigated. RESULTS The investigated anthropometric indices showed a significant increase of the vertical height of the upper lip without changing the relation of the upper vermilion to the cutaneous upper lip. The lower vermilion height increased relatively to the cutaneous lower lip without vertical changes in the lower lip. Due to maxillary advancement the upper face height increased meanwhile the lower face height decreased due to mandibular setback. SNA and SNB angle and Wits appraisal showed typical changes related to surgery. CONCLUSIONS The investigated photo-assisted anthropometric measurements presented reproducible results related to bimaxillary surgery.
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Affiliation(s)
- Gregor F Raschke
- Department of Oral & Maxillofacial/Plastic Surgery, Friedrich Schiller University Jena, Erlanger Allee 101, 07747 Jena, Germany,
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An integrated orthognathic surgery system for virtual planning and image-guided transfer without intermediate splint. J Craniomaxillofac Surg 2014; 42:2010-7. [DOI: 10.1016/j.jcms.2014.09.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 08/22/2014] [Accepted: 09/25/2014] [Indexed: 11/22/2022] Open
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Lin X, Chen T, Liu J, Jiang T, Yu D, Shen SGF. Point-based superimposition of a digital dental model on to a three-dimensional computed tomographic skull: an accuracy study in vitro. Br J Oral Maxillofac Surg 2014; 53:28-33. [PMID: 25300890 DOI: 10.1016/j.bjoms.2014.09.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 09/10/2014] [Indexed: 11/18/2022]
Abstract
We investigated the accuracy of point-based superimposition of a digital dental model on to a 3-dimensional computed tomographic (CT) skull with intact dentition. The physical model was scanned by CT to give a virtual skull model, and a plaster dental model was taken and laser-scanned to give a digital dental model. Three different background investigators were recruited and calibrated to make the point-based superimposition, and afterwards were asked to repeat 5 superimpositions each. Five bone-to-tooth measurements for the maxilla and 6 for the mandible were selected to indicate the relation of teeth to skull. Repeated measures were made on the physical model to act as a control group, and on the virtual model to act as the test group. The absolute agreement intra-class correlation coefficient (ICC) was used to assess the intra/inter-investigator reliability; Bland-Altman analysis was used to calculate the general differences, limits of agreement, and precision ranges of the estimated limits. Inter/intra-investigator reliability was excellent with ICC varying from 0.986 to 1; Bland-Altman analysis indicated that general difference was 0.01 (0.25)mm, the upper limit of agreement was 0.50mm and the lower limit -0.47 mm, and the precision range for the upper limit was 0.43 mm to 0.57 mm and for the lower limit -0.54 mm to -0.40 mm. Clinically acceptable accuracy can be achieved using a direct point-based method to superimpose a digital dental model on to a 3-dimensional CT skull.
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Affiliation(s)
- X Lin
- Department of Stomatology, The Chinese PLA General Hospital Hainan Branch, Sanya, Hainan, China; Department of Oral & Maxillofacial Surgery, The Chinese PLA General Hospital Institution of Stomatology, Beijing, China; Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - T Chen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - J Liu
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - T Jiang
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - D Yu
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - S G F Shen
- Department of Oral and Craniomaxillofacial Science, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China.
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Nabha W, Hong YM, Cho JH, Hwang HS. Assessment of metal artifacts in three-dimensional dental surface models derived by cone-beam computed tomography. Korean J Orthod 2014; 44:229-35. [PMID: 25309862 PMCID: PMC4192524 DOI: 10.4041/kjod.2014.44.5.229] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 03/17/2014] [Accepted: 03/18/2014] [Indexed: 11/18/2022] Open
Abstract
Objective The aim of this study was to assess artifacts induced by metallic restorations in three-dimensional (3D) dental surface models derived by cone-beam computed tomography (CBCT). Methods Fifteen specimens, each with four extracted human premolars and molars embedded in a plaster block, were scanned by CBCT before and after the cavitated second premolars were restored with dental amalgam. Five consecutive surface models of each specimen were created according to increasing restoration size: no restoration (control) and small occlusal, large occlusal, disto-occlusal, and mesio-occluso-distal restorations. After registering each restored model with the control model, maximum linear discrepancy, area, and intensity of the artifacts were measured and compared. Results Artifacts developed mostly on the buccal and lingual surfaces. They occurred not only on the second premolar but also on the first premolar and first molar. The parametric values increased significantly with increasing restoration size. Conclusions Metallic restorations induce considerable artifacts in 3D dental surface models. Artifact reduction should be taken into consideration for a proper diagnosis and treatment planning when using 3D surface model derived by CBCT in dentofacial deformity patients.
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Affiliation(s)
- Wael Nabha
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Young-Min Hong
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jin-Hyoung Cho
- Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Hyeon-Shik Hwang
- Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
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Modification of planned postoperative occlusion in orthognathic surgery, based on computer-aided design/computer-aided manufacturing-engineered preoperative surgical simulation. J Oral Maxillofac Surg 2014; 73:134-51. [PMID: 25315304 DOI: 10.1016/j.joms.2014.07.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 07/05/2014] [Accepted: 07/14/2014] [Indexed: 11/24/2022]
Abstract
In orthognathic surgery, it is important to have a planned postoperative occlusion. A 3-dimensional preoperative simulation, based on 3-dimensional optically scanned occlusion data, can predict how the planned postoperative occlusion will affect the maxilla-mandibular relationship that results from orthognathic surgery. In this study we modified the planned postoperative occlusion, based on computer-aided design/computer-aided manufacturing-engineered preoperative surgical simulations. This modification made it possible to resolve the facial asymmetry of the patient successfully with a simple bilateral intraoral vertical ramus osteotomy and no additional maxillary or mandibular surgery.
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Kang SH, Lee JW, Lim SH, Kim YH, Kim MK. Dental image replacement on cone beam computed tomography with three-dimensional optical scanning of a dental cast, occlusal bite, or bite tray impression. Int J Oral Maxillofac Surg 2014; 43:1293-301. [PMID: 25015906 DOI: 10.1016/j.ijom.2014.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 04/29/2014] [Accepted: 06/17/2014] [Indexed: 11/28/2022]
Abstract
The goal of the present study was to compare the accuracy of dental image replacement on a cone beam computed tomography (CBCT) image using digital image data from three-dimensional (3D) optical scanning of a dental cast, occlusal bite, and bite tray impression. A Bracket Typodont dental model was used. CBCT of the dental model was performed and the data were converted to stereolithography (STL) format. Three experimental materials, a dental cast, occlusal bite, and bite tray impression, were optically scanned in 3D. STL files converted from the CBCT of the Typodont model and the 3D optical-scanned STL files of the study materials were image-registered. The error range of each methodology was measured and compared with a 3D optical scan of the Typodont. For the three materials, the smallest error observed was 0.099±0.114mm (mean error±standard deviation) for registering the 3D optical scan image of the dental cast onto the CBCT dental image. Although producing a dental cast can be laborious, the study results indicate that it is the preferred method. In addition, an occlusal bite is recommended when bite impression materials are used.
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Affiliation(s)
- S-H Kang
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
| | - J-W Lee
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - S-H Lim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - Y-H Kim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - M-K Kim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea
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48
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Ye N, Long H, Xue J, Wang S, Yang X, Lai W. Integration accuracy of laser-scanned dental models into maxillofacial cone beam computed tomography images of different voxel sizes with different segmentation threshold settings. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 117:780-6. [DOI: 10.1016/j.oooo.2014.02.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 02/05/2014] [Accepted: 02/19/2014] [Indexed: 11/25/2022]
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Abstract
Esthetic judgments are surely subjective, but as surely, that does not preclude them being studied objectively through rigorous scientific methods. The factual basis of a science of esthetics is not to settle whether some person or image is "objectively beautiful" but rather to determine whether some representative set or sets of individuals judge or experience him/her/it as beautiful or unattractive. The aim of this paper is to review the definitional, theoretical and methodological aspects pertaining to the perception of facial/dental attractiveness by a group of representative individuals. The first part lays down the basic principles of the perception of facial/dental attractiveness: the perception involves a jury, a field of investigation and a test providing quantitative data; the following general determinants of beauty perception are reviewed: the average morphology, the judge's cultural background, the numerology, the judge's ethnical origin. Indirect determinants are the dentition, the osseous architecture and the muscular envelope. Some disruptive factors might alter the judges' facial perception. They might be qualified as either peripheral to the face or psycho-social factors. Peripheral factors include hair style and color, skin hue, wrinkles, lips color... Psycho-social factors cover the personality of the subject being evaluated, his/her intelligence or behavior. The second part deals specifically with the methodology used to determine facial attractiveness and to correlate this latter with a specific morphology. Typically such a study aims to determine average esthetic preferences for some set of visual displays among a particular jury, given a specific task to judge esthetic quality or qualities. The sample being studied, the displays, the jury or jurys, the rating procedure must all be specified prior to collecting data. A specific emphasis will be given to the rating process and the associated morphometrics, the ultimate goal being to discriminate morphologies judged as attractive among our patients.
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Affiliation(s)
| | - Yves Bolender
- Faculté de Chirurgie Dentaire, 1 place de l'Hôpital, 67000 Strasbourg, France
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50
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Digital replacement of the distorted dentition acquired by cone beam computed tomography (CBCT): a pilot study. Int J Oral Maxillofac Surg 2013; 42:1488-93. [DOI: 10.1016/j.ijom.2013.01.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 12/07/2012] [Accepted: 01/10/2013] [Indexed: 11/20/2022]
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