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Kofod Petersen A, Forgie A, Bindslev DA, Villesen P, Staun Larsen L. Automatic removal of soft tissue from 3D dental photo scans; an important step in automating future forensic odontology identification. Sci Rep 2024; 14:12421. [PMID: 38816447 PMCID: PMC11139984 DOI: 10.1038/s41598-024-63198-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 05/27/2024] [Indexed: 06/01/2024] Open
Abstract
The potential of intraoral 3D photo scans in forensic odontology identification remains largely unexplored, even though the high degree of detail could allow automated comparison of ante mortem and post mortem dentitions. Differences in soft tissue conditions between ante- and post mortem intraoral 3D photo scans may cause ambiguous variation, burdening the potential automation of the matching process and underlining the need for limiting inclusion of soft tissue in dental comparison. The soft tissue removal must be able to handle dental arches with missing teeth, and intraoral 3D photo scans not originating from plaster models. To address these challenges, we have developed the grid-cutting method. The method is customisable, allowing fine-grained analysis using a small grid size and adaptation of how much of the soft tissues are excluded from the cropped dental scan. When tested on 66 dental scans, the grid-cutting method was able to limit the amount of soft tissue without removing any teeth in 63/66 dental scans. The remaining 3 dental scans had partly erupted third molars (wisdom teeth) which were removed by the grid-cutting method. Overall, the grid-cutting method represents an important step towards automating the matching process in forensic odontology identification using intraoral 3D photo scans.
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Affiliation(s)
| | - Andrew Forgie
- School of Medicine, Dentistry and Nursing, University of Glasgow, Glasgow, Scotland
| | - Dorthe Arenholt Bindslev
- Department of Forensic Medicine, Aarhus University, Aarhus, Denmark
- Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Palle Villesen
- Bioinformatics Research Centre, Aarhus University, Aarhus, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Line Staun Larsen
- Department of Forensic Medicine, Aarhus University, Aarhus, Denmark
- Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
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Angelone F, Ponsiglione AM, Ricciardi C, Cesarelli G, Sansone M, Amato F. Diagnostic Applications of Intraoral Scanners: A Systematic Review. J Imaging 2023; 9:134. [PMID: 37504811 PMCID: PMC10381333 DOI: 10.3390/jimaging9070134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/08/2023] [Accepted: 06/19/2023] [Indexed: 07/29/2023] Open
Abstract
In addition to their recognized value for obtaining 3D digital dental models, intraoral scanners (IOSs) have recently been proven to be promising tools for oral health diagnostics. In this work, the most recent literature on IOSs was reviewed with a focus on their applications as detection systems of oral cavity pathologies. Those applications of IOSs falling in the general area of detection systems for oral health diagnostics (e.g., caries, dental wear, periodontal diseases, oral cancer) were included, while excluding those works mainly focused on 3D dental model reconstruction for implantology, orthodontics, or prosthodontics. Three major scientific databases, namely Scopus, PubMed, and Web of Science, were searched and explored by three independent reviewers. The synthesis and analysis of the studies was carried out by considering the type and technical features of the IOS, the study objectives, and the specific diagnostic applications. From the synthesis of the twenty-five included studies, the main diagnostic fields where IOS technology applies were highlighted, ranging from the detection of tooth wear and caries to the diagnosis of plaques, periodontal defects, and other complications. This shows how additional diagnostic information can be obtained by combining the IOS technology with other radiographic techniques. Despite some promising results, the clinical evidence regarding the use of IOSs as oral health probes is still limited, and further efforts are needed to validate the diagnostic potential of IOSs over conventional tools.
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Affiliation(s)
- Francesca Angelone
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
| | - Alfonso Maria Ponsiglione
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
| | - Carlo Ricciardi
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
| | - Giuseppe Cesarelli
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
| | - Mario Sansone
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
| | - Francesco Amato
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
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Lee JH, Lee HL, Park IY, On SW, Byun SH, Yang BE. Effectiveness of creating digital twins with different digital dentition models and cone-beam computed tomography. Sci Rep 2023; 13:10603. [PMID: 37391453 PMCID: PMC10313775 DOI: 10.1038/s41598-023-37774-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 06/27/2023] [Indexed: 07/02/2023] Open
Abstract
Distortion of dentition may occur in cone-beam computed tomography (CBCT) scans due to artifacts, and further imaging is frequently required to produce digital twins. The use of a plaster model is common; however, it has certain drawbacks. This study aimed to assess the feasibility of different digital dentition models over that of plaster casts. Plaster models, alginate impressions, intraoral scan (IOS) images, and CBCT images of 20 patients were obtained. The desktop model scanner was used to scan the alginate impression twice, five minutes and two hours after impression-making. Using an IOS, the full arch was scanned in segments using CS 3600 and simultaneously with i700 wireless. The digital twins obtained from the alginate impression and IOS were superimposed with those obtained from the plaster cast. The differences and distances at each reference point were measured. Scans of alginate impressions after two hours showed the greatest discrepancies, but these were all less than the CBCT voxel size of 0.39 mm. Alginate impression scans and IOS are suitable supplements to CBCT compared to the plaster model. Accuracy can be improved by scanning the alginate impression within five minutes or by intraoral scanning of the entire arch with segmentation.
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Affiliation(s)
- Joo-Hee Lee
- Division of Pediatric Dentistry, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Hye-Lim Lee
- Division of Pediatric Dentistry, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - In-Young Park
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Sung-Woon On
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Soo-Hwan Byun
- Division of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Byoung-Eun Yang
- Division of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea.
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea.
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea.
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Wu Q, Wu J, Tan Y, Sun J, Yu H. A chairside digital radiographic guide for registering digital casts to cone beam computed tomography scans with strong metallic artifacts. J Prosthet Dent 2023:S0022-3913(22)00758-2. [PMID: 36610844 DOI: 10.1016/j.prosdent.2022.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/07/2022] [Accepted: 11/07/2022] [Indexed: 01/06/2023]
Abstract
Accurate registration of digital casts and cone beam computed tomography (CBCT) scans with strong metallic artifacts is essential for the accuracy of guided implant surgery. This article describes a procedure for mapping digital casts onto CBCT scans containing significant scatter artifacts in the virtual implant planning stage. The technique uses a chairside segmented occlusal wing-like radiographic guide, which is constructed of digital splints fabricated using a desktop 3-dimensional printer and composite resin spheres as markers to accurately superimpose the bimaxillary digital scans onto the CBCT scans in a single procedure. This cost-effective technique is timesaving for clinicians and patients, and the digital information for implant planning can be collected in a single visit.
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Affiliation(s)
- Qin Wu
- Doctoral candidate, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Jiacheng Wu
- Graduate student, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Ying Tan
- Graduate student, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Jikui Sun
- Graduate student, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Haiyang Yu
- Professor, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China.
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