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El Bachaoui S, Verhelst PJ, de Faria Vasconcelos K, Shaheen E, Coucke W, Swennen G, Jacobs R, Politis C. The impact of CBCT-head tilting on 3D condylar segmentation reproducibility. Dentomaxillofac Radiol 2023; 52:20230072. [PMID: 37606052 PMCID: PMC10461261 DOI: 10.1259/dmfr.20230072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 06/26/2023] [Accepted: 06/29/2023] [Indexed: 08/23/2023] Open
Abstract
OBJECTIVES To investigate whether variations in head positioning may influence the reproducibility of cone-beam CT (CBCT) three-dimensional (3D) segmented models of the mandibular condyle. METHODS Five fresh frozen cadaver heads were scanned in four different positions: reference position (RP) and a set of three tilted alternative head positions (AP) in anteroposterior direction (AP1: 2 cm anterior translation, AP2: 5° pitch rotation, AP3: 10° pitch rotation). Surface models of mandibular condyles were constructed and compared with the condylar reference position using voxel-based registration. Descriptive statistics and a linear mixed-effects model were performed to compare condylar volumetric differences and root mean square (RMS) distance between surfaces of AP vs RP. RESULTS The mean differences in condylar volumes of AP vs RP were 14.1 mm³ (95% CI [-79.3, 107.4]) for AP1, 1.0 mm³ (95% CI [-87.2, 89.2]) for AP2 and 0.1 mm³ (95% CI [-88.3, 88.4]) for AP3. Mean and absolute volumetric differences did not exceed earlier reported intraoperator differences of 30 mm³. The RMS distance values obtained per group were 0.12 mm (95% CI [0.05,0.20]) for AP1, 0.17 mm (95% CI [0.10, 0.22]) for AP2 and 0.17 mm for AP3 (95% CI [0.10,0.22]). The confidence intervals (CI) for RMS distance remained far below the threshold for clinical acceptability (0.5 mm). CONCLUSIONS Within the limits of the present study, it is suggested that tilted head positions may affect the reproducibility of 3D condylar segmentation, thereby influencing outcome in repeated CBCT scanning. Nevertheless, observed differences are unlikely to have a meaningful impact on clinical patient diagnosis and management.
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Affiliation(s)
| | | | | | | | - Wim Coucke
- Certified Freelance Statistician, Heverlee, Belgium
| | - Gwen Swennen
- Division of Maxillofacial Surgery, AZ Sint-Jan Brugge-Oostende AV, Brugge, Belgium
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2
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Rodrigues CT, Jacobs R, Ezeldeen M, Vasconcelos KDF, Lambrechts P, Tanomaru Filho M, Pinto JC, Duarte MAH. How does nano-focus computed tomography impact the quantification of debris within the root canal system? Braz Oral Res 2023; 37:e059. [PMID: 37341232 DOI: 10.1590/1807-3107bor-2023.vol37.0059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 01/05/2023] [Indexed: 06/22/2023] Open
Abstract
The aim of this study was to compare the quantification of hard-tissue debris by using micro-computed tomography (micro-CT) and nano-focus computed tomography (nano-CT) after root canal instrumentation. Ten mandibular molars containing an isthmus in the mesial root were scanned in a SkyScan 1172 micro-CT device with a voxel size of 12.8 µm and in a NanoTom nano-CT device with 5.5 µm. The mesial root canals were irrigated with 5 mL of saline solution at the orifice level, instrumented with Reciproc R25 files and a second scanning was performed by micro-CT and nano-CT devices for post-instrumentation images. DataViewer software was used for registering the pre- and post-operative micro-CT and nano-CT images. The root canal and the debris were segmented for quantitative analysis of the volume of the canal and volume of debris using CTAn software. Statistical analysis was performed using the T test for comparison between volume of the canal after instrumentation and volume of debris in both image modalities. The level of significance was set at p < 0.05. Nano-CT images showed higher values of debris when compared with micro-CT (p < 0.05) after root canal instrumentation. No difference was observed between the volume of the root canal after instrumentation in the two imaging methods used (p > 0.05). Nano-CT technology can be recommended as a more precise method for quantitative analysis of hard-tissue debris. Moreover, in Endodontic research it is a promising method, as it is capable of providing higher spatial and contrast resolution, faster scanning and higher image quality.
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Affiliation(s)
- Clarissa Teles Rodrigues
- Universidade de São Paulo - USP, Bauru School of Dentistry, Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru, SP, Brazil
| | - Reinhilde Jacobs
- University Hospitals Leuven, Faculty of Medicine, Department of Imaging and Pathology, Leuven, Belgium
| | - Mostafa Ezeldeen
- University Hospitals Leuven, Faculty of Medicine, Department of Imaging and Pathology, Leuven, Belgium
| | | | - Paul Lambrechts
- University Hospitals Leuven, KU Leuven and Dentistry, Department of Oral Health Sciences, Endodontology, Leuven, Belgium
| | - Mario Tanomaru Filho
- Universidade Estadual Paulista - Unesp, School of Dentistry, Department of Restorative Dentistry, Araraquara, SP, Brazil
| | - Jader Camilo Pinto
- Universidade Estadual Paulista - Unesp, School of Dentistry, Department of Restorative Dentistry, Araraquara, SP, Brazil
| | - Marco Antonio Hungaro Duarte
- Universidade de São Paulo - USP, Bauru School of Dentistry, Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru, SP, Brazil
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3
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Fontenele RC, Picoli FF, Pinto JC, Coudyzer W, de Faria Vasconcelos K, Farias Gomes A, Binst J, Jacobs R. Feasibility of photon-counting computed tomography as a novel imaging modality for challenging endodontic diagnostic tasks. Sci Rep 2023; 13:6266. [PMID: 37069172 PMCID: PMC10110619 DOI: 10.1038/s41598-023-33322-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 04/11/2023] [Indexed: 04/19/2023] Open
Abstract
Photon-counting computed tomography (PCCT) is an innovative technological advancement in relation to x-ray detectors which offers ultra-high-resolution images. The current study aimed to evaluate the visualization ability of PCCT compared to cone-beam computed tomographic (CBCT) devices for challenging endodontic diagnostic tasks. A reference image of an anthropomorphic phantom was acquired using an industrial micro-CT device. Thereafter, the phantom was scanned with three imaging devices, which included PCCT scanner (NAEOTOM Alpha) and two CBCT devices (3D Accuitomo 170 and NewTom VGi evo) having standard and high-resolution acquisition protocols. The diagnostic tasks involved visualizing fine endodontic structures (apical delta, narrow canal, and isthmus) and root cracks. Three experienced examiners assessed the images and were blinded to the PCCT and CBCT devices. Each image was rated according to a three-grade scale (appropriate, acceptable, or inappropriate) for the diagnostic tasks. In relation to fine endodontic structures grouped together, PCCT showed similar diagnostic performance compared to the reference image (p > 0.05). As for the CBCT devices, an excellent performance was only observed with the 3D Accuitomo 170 device at a high-resolution acquisition mode (p > 0.05). The visualization of root cracks was also better with 3D Accuitomo 170 compared to other devices (p < 0.05). Overall, PCCT and 3D Accuitomo 170 at a high-resolution setting showed similar performance for visualizing fine endodontic structures. In addition, the high-resolution CBCT protocol was superior for visualizing root cracks compared to both PCCT and other standard- and high-resolution CBCT protocols.
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Affiliation(s)
- Rocharles Cavalcante Fontenele
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
- Department of Oral & Maxillofacial Surgery, University Hospitals Leuven, KU Leuven, Leuven, Belgium
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Fernando Fortes Picoli
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
- Department of Oral & Maxillofacial Surgery, University Hospitals Leuven, KU Leuven, Leuven, Belgium
- Department of Dentistry, School of Dentistry, Federal University of Goiás, Goiânia, GO, Brazil
| | - Jader Camilo Pinto
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
- Department of Oral & Maxillofacial Surgery, University Hospitals Leuven, KU Leuven, Leuven, Belgium
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | | | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
- Department of Oral & Maxillofacial Surgery, University Hospitals Leuven, KU Leuven, Leuven, Belgium
| | - Amanda Farias Gomes
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Joke Binst
- Department of Radiology, UZ Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, KU Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium.
- Department of Oral & Maxillofacial Surgery, University Hospitals Leuven, KU Leuven, Leuven, Belgium.
- Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden.
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Gaêta-Araujo H, Pinheiro MCR, Leite AF, Vasconcelos KDF, Jacobs R, Oliveira-Santos C. Radiographic perception of anatomical structures and bony changes in oncologic patients under antiresorptive therapy. Support Care Cancer 2023; 31:149. [PMID: 36737557 DOI: 10.1007/s00520-023-07613-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 01/25/2023] [Indexed: 02/05/2023]
Abstract
PURPOSE To assess radiographic presentation of anatomical structures, bony changes and soft tissue calcifications on panoramic radiographs of oncologic patients under high dose antiresorptive drug therapy (ART) before exposure to dental extraction. METHODS Panoramic radiographs of 57 patients under ART, taken previously to tooth extraction, and 57 control patients were evaluated by two oral radiologists regarding bone pattern, anatomical structures visibility, estimation of cortical width, mandibular cortical index (MCI), and presence of soft tissue calcifications. Parameters were compared between ART and age- and gender-matched healthy control groups. Bone patterns were further assessed by regions with or without tooth extractions and according to uneventful healing or MRONJ development. All comparisons were made using chi-square test with significance level set at 5%. RESULTS Mandible and posterior maxilla presented more sclerotic bone patterns in patients under ART, regardless of tooth extraction and MRONJ development status (p < 0.05). Heterogeneous bone pattern was identified in two regions that both were subsequently affected by MRONJ. Anatomical structure visibility and presence of soft tissue calcifications was not different among groups (p > 0.05). ART patients showed significantly more C0 (thickening) and C1 MCI (p < 0.05). CONCLUSION Sclerotic bone pattern and thicker mandibular cortices may represent a consequence of ART rather than MRONJ specific findings. Prospective studies on larger patient samples radiographically followed-up during the ART treatment are advised, with specific attention to heterogenous trabecular bone pattern as a possible MRONJ predictor.
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Affiliation(s)
- Hugo Gaêta-Araujo
- Department of Stomatology, Public Oral Health, and Forensic Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. Do Café, S/N, 14040-904, Ribeirão Preto, Brazil.
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
| | - Maria Clara Rodrigues Pinheiro
- Division of Oral Radiology, Department of Oral Diagnosis, School of Dentistry of Piracicaba, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - André Ferreira Leite
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
- Department of Dentistry, Faculty of Health Sciences, University of Brasilia, Brasilia, Brazil
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
- Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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5
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Evangelista K, de Faria Vasconcelos K, Teodoro AB, Cavalcanti MGP, de Mendonça EF, Watanabe S, Silva MAG. Malignant tumours mimicking periapical lesions: A report of three cases and literature review. AUST ENDOD J 2022; 48:515-521. [PMID: 34939718 DOI: 10.1111/aej.12597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 11/12/2021] [Accepted: 12/05/2021] [Indexed: 12/14/2022]
Abstract
Apical periodontitis shows radiographic signs such as widening of the periodontal ligament and periapical radiolucency, which differ in extent depending on the stage of the lesion. However, other lesions can be associated with or coincidental to the apical region, representing developmental lesions and benign or malignant tumours. This article describes three cases of malignant tumours, a central mucoepidermoid carcinoma (CMEC), a chondroblast osteosarcoma and an osteosarcoma of the jaw (OSJ) that presented as periapical lesions. Endodontists must be aware of unsuccessful treatment, persistent pain, signs of paraesthesia, a rapid growth rate and delayed response to therapy associated with atypical features. Complementary examinations, such as biopsy and computed tomography, can allow the early diagnosis of malignant tumours, leading to a better prognosis and thus increased survival rates and improvement in quality of life.
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Affiliation(s)
- Karine Evangelista
- Division of Orthodontics, Dental School, Federal University of Goiás, Goiás, Brazil
| | - Karla de Faria Vasconcelos
- Department of Imaging and Pathology & Department of Oral Health Sciences, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Ana Beatriz Teodoro
- Department of Stomatology, Dental School, Federal University of Goiás, Goiás, Brazil
| | | | | | - Satiro Watanabe
- Department of Oral and Maxillofacial Surgery, Dental School, Federal University of Goiás, Goiás, Brazil
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6
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Tarce M, de Greef A, Lahoud P, de Faria Vasconcelos K, Jacobs R, Quirynen M. The impact of implant-related characteristics on dental implant blooming: An in vitro study. Clin Oral Implants Res 2022; 33:1199-1211. [PMID: 36189488 DOI: 10.1111/clr.14002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/22/2022] [Accepted: 09/20/2022] [Indexed: 12/13/2022]
Abstract
AIM To assess, in vitro, variables potentially influencing implant blooming using a human-like imaging phantom and 3D-printed mandibles. MATERIAL AND METHODS Sixty implants were inserted in 3D-printed mandibles in 26 different configurations in order to examine the impact of implant diameter, presence of a cover screw, implant design/material, implant position, and the presence of additional implants on implant blooming using two cone-beam computed tomography (CBCT) devices (Accuitomo [ACC] and NewTom [NWT]). Two observers measured the amount of implant blooming in both buccolingual and mesiodistal directions. Inter-rater agreement and descriptive statistics, grouped by implant characteristic and CBCT device, were calculated. RESULTS Both CBCT devices increased implant diameter (a mean increase of 9.2% and 11.8% for titanium, 20.3% and 24.4% for zirconium, for ACC and NWT, respectively). An increase in implant diameter did not increase the amount of blooming, whereas placing a cover screw did (from 8.0% to 10.9% for ACC, and from 10.0% to 15.6% for NWT). Moreover, implant design, anatomical region, and the presence of another implant also affected the extent of the blooming. CONCLUSIONS Dental implants show a clear diameter increase on CBCT, with the effect being more pronounced for zirconium than for titanium implants. Similar effects are likely to occur in the clinical setting, potentially masking nonosseointegration, reducing the dimensions of peri-implant defects, and/or causing underestimation of the buccal bone thickness.
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Affiliation(s)
- Mihai Tarce
- Department of Oral Health Sciences, KU Leuven & Dentistry (Periodontology), University Hospitals Leuven, Leuven, Belgium
| | - Alexander de Greef
- Department of Oral Health Sciences, KU Leuven & Dentistry (Periodontology), University Hospitals Leuven, Leuven, Belgium
| | - Pierre Lahoud
- Department of Oral Health Sciences, KU Leuven & Dentistry (Periodontology), University Hospitals Leuven, Leuven, Belgium.,OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University Hospitals Leuven, Leuven, Belgium.,Department of Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University Hospitals Leuven, Leuven, Belgium.,Department of Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Marc Quirynen
- Department of Oral Health Sciences, KU Leuven & Dentistry (Periodontology), University Hospitals Leuven, Leuven, Belgium
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7
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Lobo NS, Jacobs R, Vasconcelos KDF, Wanderley VA, Santos BCD, Marciano MA, Zaia AA. Influence of working length and anatomical complexities on the apical root canal filling: a nano-CT study. Braz Dent J 2022; 33:1-7. [PMID: 35766712 PMCID: PMC9645203 DOI: 10.1590/0103-6440202204576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 12/08/2021] [Indexed: 12/02/2022] Open
Abstract
The present study aimed to compare the filled volume by gutta-percha and sealer
in the apical region of the main canal and ramifications, after instrumentation
at two different working lengths using nano-computed tomography (nano-CT).
Twenty-two premolars with apical ramifications were selected after
micro-computed tomography evaluation and were randomly divided into groups for
further endodontic instrumentation at two different working lengths: G1 - Root
canals shaped 1 mm short of the apical foramen (n=11), and G2 - Root canals
shaped at the apical foramen (n=11). After completing root treatment, nano-CT
images were acquired, and the filled volume by gutta-percha and sealer in the
main canal apical 0-4 mm and 0-1 mm ranges, and apical ramifications were
objectively measured by an operator specialized in both radiology and
endodontics, blinded for both groups. The Mann-Whitney test was applied to
compare both groups regarding the filling of the main canal apical ranges and
apical ramifications with a significance level of 5% (α ≤ 0.05). It was observed
that root canals shaped at the apical foramen had a larger volume of the main
canal filled than root canals shaped 1 mm short of the apical foramen, at both
apical ranges (0-4 and 0-1 mm) (p<0.05). Regarding the filling of the apical
ramifications, there was no significant difference between groups (p>0.05).
In conclusion, the root canals shaped at apical foramen exhibited increased
filling volume of the main canal in the apical region. However, neither of both
working lengths influenced filling of the apical ramifications.
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Affiliation(s)
- Natalia Siqueira Lobo
- Department of Restorative Dentistry, Endodontic Division, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Reinhilde Jacobs
- OMFS IMPATH research group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Karla de Faria Vasconcelos
- OMFS IMPATH research group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, Leuven, Belgium
| | - Victor Aquino Wanderley
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | | | - Marina Angélica Marciano
- Department of Restorative Dentistry, Endodontic Division, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Alexandre Augusto Zaia
- Department of Restorative Dentistry, Endodontic Division, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
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Wanderley VA, Leite AF, de Faria Vasconcelos K, Pauwels R, Müller-García F, Becker K, Oliveira ML, Jacobs R. Impact of metal artefacts on subjective perception of image quality of 13 CBCT devices. Clin Oral Investig 2022; 26:4457-4466. [PMID: 35166942 DOI: 10.1007/s00784-022-04409-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 02/09/2022] [Indexed: 12/01/2022]
Abstract
OBJECTIVES The overall objective of this study was to assess how metal artefacts impact image quality of 13 CBCT devices. As a secondary objective, the influence of scanning protocols and field of view on CBCT image quality with and without metal artefacts was also assessed. MATERIALS AND METHODS CBCT images were acquired of a dry human skull phantom considering three clinical simulated conditions: one without metal and two with metallic materials (metallic pin and implant). An industrial micro-CT was used as a reference to register the CBCT images. Afterwards, four observers evaluated 306 representative image slices from 13 devices, ranking them from best to worst. Furthermore, within each device, medium FOV and small FOV standard images were compared. General linear mixed models were used to assess subjective perception of examiners on overall image quality in the absence and presence of metal-related artefacts (p < 0.05). RESULTS Image quality perception significantly differed amongst CBCT devices (p < 0.05). Some devices performed significantly better, independently of scanning protocol and clinical condition. In the presence of metal artefacts, medium FOV standard scanning protocols scored significantly better, while in the absence of metal, small FOV standard yielded the highest performance. CONCLUSIONS Subjective image quality differs significantly amongst CBCT devices and scanning protocols. Metal-related artefacts may highly impact image quality, with a significant device-dependent variability and only few scanners being more robust against metal artefacts. Often, metal artefact expression may be somewhat reduced by proper protocol selection. CLINICAL RELEVANCE Metallic objects may severely impact image quality in several CBCT devices.
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Affiliation(s)
- Victor Aquino Wanderley
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium. .,Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
| | - Andre Ferreira Leite
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dentistry, Faculty of Health Sciences, University of Brasília, Brasília, Brazil
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Ruben Pauwels
- Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark.,Department of Mechanical Engineering, Catholic University of Leuven, Leuven, Belgium
| | - Francisca Müller-García
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Kathrin Becker
- Department of Orthodontics, Universitätsklinikum Düsseldorf, Düsseldorf, Germany
| | - Matheus L Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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9
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Wanderley VA, de Faria Vasconcelos K, Leite AF, Pauwels R, Shujaat S, Jacobs R, Oliveira ML. Impact of the blooming artefact on dental implant dimensions in 13 cone-beam computed tomography devices. Int J Implant Dent 2021; 7:67. [PMID: 34258634 PMCID: PMC8277908 DOI: 10.1186/s40729-021-00347-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 04/22/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The purpose of this study was to objectively assess dimensional alteration (blooming artefact) on dental implant using 13 cone-beam computed tomography (CBCT) devices adjusted to device-specific scanning protocols and to assess whether subjective adjustment of brightness and contrast (B&C) could alter its visualization. METHODS An anthropomorphic phantom containing a dental implant was scanned in 13 CBCT devices adjusted to three scanning protocols: medium-FOV standard resolution, small-FOV standard resolution, and small-FOV high resolution. The diameter of the implant was measured at five levels, averaged, and compared with those from a reference standard industrial CT image. B&C adjustments were performed and measurements were repeated. The intraclass correlation coefficient assessed the reliability of the measurements and general linear mixed models were applied for multiples comparisons at a 95% confidence interval. RESULTS Implant diameter obtained from small-FOV high-resolution protocols in most CBCT devices was not significantly different when compared to that from the reference (p > 0.05). For standard protocols, significant dimensional alteration of the implant ranging from 23 to 34% (0.67 to 1.02 mm) was observed in 9 CBCT devices for small-FOV scanning (p < 0.05), and in 8 CBCT devices for medium-FOV scanning, implant dimensional alteration ranged significantly from 21 to 35% (0.62 to 1.04 mm). After B&C adjustments, dimensional alteration was reduced for several of the CBCT devices tested (p < 0.05). CONCLUSIONS The visualization of the implant dimensional alteration differed between CBCT devices and scanning protocols with an increase in diameter ranging from 0.27 to 1.04 mm. For most CBCT devices, B&C adjustments allowed to reduce visualization of implant blooming.
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Affiliation(s)
- Victor Aquino Wanderley
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium. .,Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
| | - Karla de Faria Vasconcelos
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Andre Ferreira Leite
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dentistry, Faculty of Health Sciences University of Brasília, Brasília, Brazil
| | - Ruben Pauwels
- Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark.,Department of Mechanical Engineering, Catholic University of Leuven, Leuven, Belgium
| | - Sohaib Shujaat
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Matheus L Oliveira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
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Gaêta-Araujo H, Ferreira Leite A, de Faria Vasconcelos K, Coropciuc R, Politis C, Jacobs R, Oliveira-Santos C. Why do some extraction sites develop medication-related osteonecrosis of the jaw and others do not? A within-patient study assessing radiographic predictors. Int J Oral Implantol (Berl) 2021; 14:87-98. [PMID: 34006074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
PURPOSE To compare radiographic predictors of medication-related osteonecrosis of the jaw in dental extraction sites. MATERIALS AND METHODS Forty-one oncological patients undergoing intravenous or subcutaneous antiresorptive treatment, with a history of dental extraction visualised by panoramic imaging, were included in this retrospective study. Age-, sex- and extracted tooth-matched healthy patients who had previously undergone panoramic imaging were selected as controls (n = 57). A total of 288 extraction sites were independently evaluated by two oral and maxillofacial radiologists, who assessed eight distinct radiographic features. The radiographic features of extraction sites were noted to allow comparison between and within subjects regarding healing and osteonecrosis development. The association between radiographic findings, underlying dental disease and medication-related osteonecrosis of the jaw was also tested. The level of significance was set at 5%. RESULTS Patients under antiresorptive treatment presented with widening of the periodontal ligament space, thickening of the lamina dura, sclerotic bone pattern, horizontal bone loss and periapical radiolucency with bone reaction (P ≤ 0.05). Development of medication-related osteonecrosis of the jaw was associated with altered bone pattern, angular bone loss, furcation involvement and unsatisfactory endodontic treatment (P ≤ 0.05). An association between medication-related osteonecrosis of the jaw and previous dental disease was also found, particularly for periapical lesions and endodontic-periodontal disease (P ≤ 0.05). CONCLUSIONS Radiographic predictors of further development of medication-related osteonecrosis of the jaw in extraction sites include heterogeneous bone pattern, angular bone loss and furcation involvement. Extraction sites with underlying bony changes related to endodontic and endodontic-periodontal disease are more prone to development of medication-related osteonecrosis of the jaw.
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11
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Pinto JC, Wanderley VA, de Faria Vasconcelos K, Leite AF, Pauwels R, Nadjmi M, Oliveira ML, Tanomaru-Filho M, Jacobs R. Evaluation of 10 Cone-beam Computed Tomographic Devices for Endodontic Assessment of Fine Anatomic Structures. J Endod 2021; 47:947-953. [PMID: 33691170 DOI: 10.1016/j.joen.2021.02.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 02/15/2021] [Accepted: 02/27/2021] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The purpose of this study was to classify 10 cone-beam computed tomographic (CBCT) devices using a ranking model according to the detection of fine endodontic structures. METHODS A dedicated dentate anthropomorphic phantom was scanned 2 times using 10 CBCT devices without any metal (metal-free condition) and with an endodontically treated tooth containing a metallic post (metal condition). A reference image acquired on an industrial micro-CT scanner was used to register all CBCT images, yielding corresponding anatomic slices. Afterward, 3 experienced observers assessed all acquired CBCT images for their ability to assess a narrow canal, isthmus, and apical delta ramification using a categoric rank from 1 (best) to 10 (worst). Fleiss kappa statistics were used to calculate intra- and interobserver agreements for each CBCT device separately. Based on the observers' scores, general linear mixed models were applied to compare image quality among different CBCT devices for performing endodontic diagnostic tasks (α = .05). RESULTS The 10 CBCT devices performed differently for the evaluated endodontic tasks (P < .05), with 3 devices performing better for endodontic feature detection. Yet, in the presence of metal, only 2 devices were able to keep a high level of endodontic feature detection. CONCLUSIONS The evaluated endodontic tasks were CBCT device dependent, and their detection was influenced by the presence of metal.
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Affiliation(s)
- Jader Camilo Pinto
- Department of Restorative Dentistry, São Paulo State University, School of Dentistry, Araraquara, São Paulo, Brazil; OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
| | - Victor Aquino Wanderley
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - André Ferreira Leite
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Dentistry, Faculty of Health Sciences University of Brasília, Brasília, Brazil
| | - Ruben Pauwels
- Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark; Department of Mechanical Engineering, Catholic University of Leuven, Leuven, Belgium
| | - Mansour Nadjmi
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Matheus L Oliveira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Mario Tanomaru-Filho
- Department of Restorative Dentistry, São Paulo State University, School of Dentistry, Araraquara, São Paulo, Brazil
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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12
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Gaêta-Araujo H, Leite AF, Vasconcelos KDF, Jacobs R. Two decades of research on CBCT imaging in DMFR - an appraisal of scientific evidence. Dentomaxillofac Radiol 2021; 50:20200367. [PMID: 33555198 DOI: 10.1259/dmfr.20200367] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE This article aims to appraise how scientific evidence related to CBCT has changed over the years, based on levels of evidence and diagnostic efficacy. METHODS A general search strategy was used in different databases (Pubmed, Embase, and Web of Science) to identify systematic reviews (SRs) on CBCT until November of 2020. The SRs included were divided according to different specialties of dentistry. A critical review of the articles was made, describing the level of evidence and efficacy. RESULTS In total, 75 articles were selected. There was an increase in the number of SRs on CBCT from 2014 onwards, as 83% of the SRs on this topic were published after 2013, and 72% between 2016 and to date. Twenty SRs (27%) performed meta-analysis. Only 28% of the SRs provided a detailed description of CBCT protocols. According to SR evidence, almost all specialties of dentistry have advanced concomitantly with the introduction of CBCT. The majority of SRs were related to clinical applications (level 2 of efficacy), followed by technical parameters (level 1 of efficacy). Only some CBCT models were mentioned in the SRs selected. CONCLUSION Over the course of 20 years, SRs related to CBCT applications for a broad range of dental specialties have been published, with the vast majority of studies at levels 1 and 2 of diagnostic efficacy. Not all CBCT models available on the market have been scientifically validated. At all times, one should remain cautious as such not to simply extrapolate in vitro results to the clinical setting. Also, considering the wide variety of CBCT devices and protocols, reported results should not be overstated or generalized, as outcomes often refer to specific CBCT devices and protocols.
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Affiliation(s)
- Hugo Gaêta-Araujo
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, 13414-903, Piracicaba, Sao Paulo, Brazil
| | - André Ferreira Leite
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dentistry, Faculty of Health Sciences, University of Brasilia, Brasilia, Brazil
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institute, Stockholm, Sweden
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13
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Song D, Shujaat S, de Faria Vasconcelos K, Huang Y, Politis C, Lambrichts I, Jacobs R. Diagnostic accuracy of CBCT versus intraoral imaging for assessment of peri-implant bone defects. BMC Med Imaging 2021; 21:23. [PMID: 33568085 PMCID: PMC7877020 DOI: 10.1186/s12880-021-00557-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 02/01/2021] [Indexed: 01/28/2023] Open
Abstract
Background Early detection of marginal bone loss is vital for treatment planning and prognosis of teeth and implant. This study was conducted to assess diagnostic accuracy of CBCT compared to intra-oral (IO) radiography for detection, classification, and measurement of peri-implant bone defects in an animal model. Methods Fifty-four mandible blocks with implants were harvested from nine male health adult beagle dogs with acquisition of IO, CBCT and micro-CT images from all samples. Peri-implant bone defects from 16 samples were diagnosed using micro-CT and classified into 3 defect categories: dehiscence (n = 5), infrabony defect (n = 3) and crater-like defect (n = 8). Following training and calibration of the observers, they asked to detect location (mesial, distal, buccal, lingual) and shape of the defect (dehiscence, horizontal defect, vertical defect, carter-like defect) utilizing both IO and CBCT images. Both observers assessed defect depth and width on IO, CBCT and micro-CT images at each side of peri-implant bone defect via CT-analyzer software. Data were analyzed using SPSS software and a p value of < 0.05 was considered as statistically significant. Results Overall, there was a high diagnostic accuracy for detection of bone defects with CBCT images (sensitivity: 100%/100%), while IO images showed a reduction in accuracy (sensitivity: 69%/63%). Similarly, diagnostic accuracy for defect classification was significantly higher for CBCT, whereas IO images were unable to correctly identify vestibular dehiscence, with incorrect assessment of half of the infrabony defects. For accuracy of measuring defect depth and width, a higher correlation was observed between CBCT and gold standard micro-CT (r = 0.91, 95% CI 0.86–0.94), whereas a lower correlation was seen for IO images (r = 0.82, 95% CI 0.67–0.91). Conclusions The diagnostic accuracy and reliability of CBCT was found to be superior to IO imaging for the detection, classification, and measurement of peri-implant bone defects. The application of CBCT adds substantial information related to the peri-implant bone defect diagnosis and decision-making which cannot be achieved with conventional IO imaging.
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Affiliation(s)
- Dandan Song
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium.
| | - Sohaib Shujaat
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium
| | - Yan Huang
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium.,West China College of Stomatology, State Key Laboratory of Oral Disease & National Clinical Research Center for Oral Disease, Sichuan University, Chengdu, China
| | - Constantinus Politis
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium
| | - Ivo Lambrichts
- Department of Morphology, Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institute, Stockholm, Sweden
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14
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Van Hoe S, Shaheen E, de Faria Vasconcelos K, Schoenaers J, Politis C, Jacobs R. Contribution of three-dimensional images in the planning of cementoblastoma resection. BJR Case Rep 2021; 7:20200156. [PMID: 34131494 PMCID: PMC8171136 DOI: 10.1259/bjrcr.20200156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/17/2020] [Accepted: 12/20/2020] [Indexed: 12/02/2022] Open
Abstract
Cementoblastomas are rare benign tumours that represent less than 1% of all odontogenic tumours. Complete resection is mandatory to avoid recurrence. This case report describes the contribution of three-dimensional imaging and three-dimensional printing in the pre-operative surgical planning of a large cementoblastoma that not only caused substantial compression on the inferior alveolar and mental nerves, but also caused thinning and partial erosion of the lingual and vestibular cortical bone, thus increasing the risk of pre-operative mandibular fracture.
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Affiliation(s)
| | - Eman Shaheen
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven. Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven. Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Joseph Schoenaers
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven. Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Constantinus Politis
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven. Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
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15
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Shujaat S, Letelier C, De Grauwe A, Desard H, Orhan K, Vasconcelos KDF, Mangione F, Coucke W, Jacobs R. The influence of image display systems on observers' preference for visualizing subtle dental radiographic abnormalities. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 132:475-482. [PMID: 33495123 DOI: 10.1016/j.oooo.2020.12.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 12/12/2020] [Accepted: 12/23/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The objectives of this study were to assess observers' preference for standard screens (SSs) or medical displays (MDs) in visualizing difficult-to-diagnose radiographic dental abnormalities and their preference for dental filter tools when utilized with MD systems. STUDY DESIGN A retrospective data set of 60 in vivo radiographs consisting of intraoral (n = 20), panoramic (n = 20), and cone beam computed tomography (n = 20) images was created. Three image display monitors, including an SS, an MD, and an MD with 3 dental filter configurations (bone-low density enhancement filter, tooth-high density enhancement filter, and a combined filter representing regular MD), were utilized to assess 4 observers' monitor preferences in detecting radiographically subtle dental abnormalities. The data were analyzed by using binomial distribution. A P value ≤.05 was considered statistically significant. RESULTS Although observers expressed preference for MD for visualizing some abnormalities when examining intraoral and panoramic radiographs, MD was not preferred for detection of any abnormalities with cone beam computed tomography. There were no significant differences in preference for SS or MD overall (P ≥ .2024). Observers expressed significant preference for the filters in visualizing all but 2 abnormalities (P ≤ .0252). CONCLUSIONS The use of MD monitors enabled with dental filter tools may be preferred for visualizing certain subtle abnormalities.
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Affiliation(s)
- Sohaib Shujaat
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
| | - Carolina Letelier
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Annelore De Grauwe
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Hadewych Desard
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Kaan Orhan
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Francesca Mangione
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Oral Pathology and Surgery Department & Orofacial Pathologies, Imaging and Biotherapies (EA2496), Faculty of Dental Surgery, Paris Descartes University, Paris, France
| | - Wim Coucke
- Scientific Institute of Public Health, Department of Quality of Medical Laboratories, Brussels, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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16
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Wanderley VA, Vasconcelos KDF, Leite AF, Oliveira ML, Jacobs R. Dentomaxillofacial CBCT: Clinical Challenges for Indication-oriented Imaging. Semin Musculoskelet Radiol 2020; 24:479-487. [PMID: 33036036 DOI: 10.1055/s-0040-1709428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This critical review discusses the clinical challenges for patient-specific and indication-oriented dentomaxillofacial cone beam computed tomography (CBCT). Large variations among units and protocols may lead to variable degrees of diagnostic and three-dimensional model accuracy, impacting both specific diagnostic tasks and treatment planning. Particular indications, whether diagnostic or therapeutic, may give rise to very specific challenges with regard to CBCT unit and parameter setup, considering the required image quality, segmentation accuracy, and artifact level. Considering that dental materials are in the field of view needed for diagnosis or treatment planning, artifact expression is a dominant factor in proper CBCT selection. The heterogeneity of dental CBCT units and performances may highly impact the scientific results. Thus research findings cannot be simply generalized as published evidence, and a demonstrated clinical applicability for a specific indication should not be simply extrapolated from one CBCT unit to another.
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Affiliation(s)
- Victor Aquino Wanderley
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.,OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - André Ferreira Leite
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dentistry, Faculty of Health Sciences, University of Brasília, Brasília, Brazil
| | - Matheus L Oliveira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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17
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Gaêta-Araujo H, Vanderhaeghen O, Vasconcelos KDF, Coucke W, Coropciuc R, Politis C, Jacobs R. Osteomyelitis, osteoradionecrosis, or medication-related osteonecrosis of the jaws? Can CBCT enhance radiographic diagnosis? Oral Dis 2020; 27:312-319. [PMID: 32623770 DOI: 10.1111/odi.13534] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 05/25/2020] [Accepted: 06/25/2020] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To attempt defining differential radiographic diagnostic characteristics for osteonecrotic lesions using 2D as opposed to 3D images. MATERIALS AND METHODS This was a cross-sectional study. Subjects presenting mandibular osteonecrotic lesions (osteomyelitis, osteoradionecrosis, and medication-related osteonecrosis of the jaws) were selected and compared to a group of age- and gender-matched controls, all having both cone-beam computed tomographic images (CBCT) and panoramic radiographs (PANO). Both imaging modalities (predictor variables) were evaluated by two radiologists that scored lesion presence, eight additional radiological features, and a composite severity index (outcome variables). For each pathologic condition, characteristic features were assessed in PANO and CBCT by the Wilcoxon signed-rank test. Regression tree analysis revealed the predictive value of PANO and CBCT (α = 5%). RESULTS Overall, the predictive value of PANO reached 74%, while for CBCT it became 90%. Regarding the composite severity index, CBCT enabled to detect more subtle lesions. Also, CBCT imaging allowed showing more distinct radiographic diagnostic features as compared to PANO imaging, more specifically when distinguishing osteomyelitis from both other lesions. CONCLUSIONS Cone-beam computed tomography enabled showing more differences in radiological features between distinct osteonecrosis disease entities. CBCT imaging might be a better contributor for the detection of early lesions and to monitor further pathological developments in the mandible.
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Affiliation(s)
- Hugo Gaêta-Araujo
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil.,OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium
| | - Olivier Vanderhaeghen
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.,Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.,Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Wim Coucke
- Scientific Institute of Public Health Section Quality of Medical Laboratories, Brussels, Belgium
| | - Ruxandra Coropciuc
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.,Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Constantinus Politis
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.,Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.,Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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Mazzi-Chaves JF, de Faria Vasconcelos K, Pauwels R, Jacobs R, Sousa-Neto MD. Cone-beam Computed Tomographic-based Assessment of Filled C-shaped Canals: Artifact Expression of Cone-beam Computed Tomography as Opposed to Micro-computed Tomography and Nano-computed Tomography. J Endod 2020; 46:1702-1711. [PMID: 32682791 DOI: 10.1016/j.joen.2020.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/05/2020] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The present study investigated the assessment of root canal fillings in a series of cone-beam computed tomographic (CBCT) images obtained from endodontically treated mandibular molars with C-shaped canals. METHODS Clinically comparable high (HR) and normal (NR) resolution protocols were selected in 3D Accuitomo 170 (J Morita Corporation, Kyoto, Japan), NewTom VGi evo (Cefla QR Verona, Verona, Italy), ProMax 3D Max (Pro; Planmeca, Helsinki, Finland), and Pax-i3D Green Premium (Pax; Vatech, Gyeonggi, South Korea). Micro-computed tomographic and nano-computed tomographic images were considered as the reference standard. The set of images was evaluated according to beam hardening artifact patterns (dark streaks, hypodense areas, and volume distortion). RESULTS Regarding dark streaks, the Fleiss kappa test showed that Pax HR and NR and Pro HR images showed the highest artifact expression. Hypodense areas were detected in 100% and 99.1% of the images obtained using Pax HR and NR, respectively. Kappa tests showed highest distortion for images derived from the Pax and Pro CBCT devices. Root canal filling assessment was considered appropriate in 100% of the 3D Accuitomo 170 HR, NewTom VGi evo NR, micro-computed tomographic, and nano-computed tomographic images. CONCLUSIONS The present study confirms the large variability in CBCT-derived artifact expression. Highlighting the increased artifact expression for particular CBCT systems, it may be concluded that for diagnosis of endodontically filled molars with C-shaped canals, the choice of CBCT unit and protocol is essential.
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Affiliation(s)
- Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium
| | - Ruben Pauwels
- Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium; Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark; Faculty of Dentistry, Department of Radiology, Chulalongkorn University, Bangkok, Thailand
| | - Reinhilde Jacobs
- Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Gaêta-Araujo H, Alzoubi T, Vasconcelos KDF, Orhan K, Pauwels R, Casselman JW, Jacobs R. Cone beam computed tomography in dentomaxillofacial radiology: a two-decade overview. Dentomaxillofac Radiol 2020; 49:20200145. [PMID: 32501720 DOI: 10.1259/dmfr.20200145] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVES The aim of this study was to evaluate and summarise features of currently and formerly available cone beam CT (CBCT) devices from 1996 to 2019. Additionally, a recommendation for standardised reporting of CBCT characteristics was provided. METHODS AND MATERIALS Information about the features of all available CBCT devices was obtained from the manufacturers' available data. Moreover, site visits to newly developed CBCT machines' manufacturers were performed in order to obtain relevant information. RESULTS A total of 279 CBCT models from 47 manufacturers located in 12 countries (Brazil, China, Denmark, Finland, France, Germany, Italy, Japan, Republic of Korea, Slovakia, Thailand, and USA) could be listed. Overall, wide variations in CBCT features and technical specifications were identified. CONCLUSIONS CBCT in dentomaxillofacial radiology is a generic term applicable to a broad range of CBCT machines and features. Experimental outcomes and literature statements regarding radiation doses, imaging performance and diagnostic applicability of dental CBCT cannot be simply transferred from one CBCT model to another considering a wide variation in technical characteristics and clinical diagnostic performance. The information tabulated in the present study will be later provided on the International Association of DentoMaxilloFacial Radiology website (www.iadmfr.one).
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Affiliation(s)
- Hugo Gaêta-Araujo
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Tamara Alzoubi
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Kaan Orhan
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of DentoMaxillofacial Radiology, Ankara University, Faculty of Dentistry, Ankara, Turkey
| | - Ruben Pauwels
- Medical Physics & Quality Assessment Department of Imaging & Pathology, Faculty of Medicine, Catholic University of Leuven, Leuven, Belgium.,Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark
| | | | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
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20
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de Faria Vasconcelos K, Queiroz PM, Codari M, Pinheiro Nicolielo LF, Freitas DQ, Jacobs R, Haiter-Neto F. A quantitative analysis of metal artifact reduction algorithm performance in volume correction with 3 CBCT devices. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:328-335. [PMID: 32439517 DOI: 10.1016/j.oooo.2020.03.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 03/20/2020] [Accepted: 03/31/2020] [Indexed: 11/20/2022]
Abstract
OBJECTIVE The aim of this study was to quantitatively assess the performance of metal artifact reduction (MAR) algorithms on the volume of metal cylinders, considering the influence of materials, positions, and fields of view (FOVs), by using 3 cone beam computed tomography (CBCT) devices (NewTom VGi evo, Picasso Trio, and ProMax 3-D Max). STUDY DESIGN Nine phantoms containing cylinders of amalgam, copper-aluminum (CuAl) metal alloy, and titanium, combined in up to 3 positions, were scanned by using 2 different FOVs. MATLAB software was used to evaluate the differences between volumes before and after MAR application, and the possible interference of materials, positions, and FOVs. Wilcoxon's test and the Kruskal-Wallis test were used at a level of significance of 5%. RESULTS In general, images containing amalgam and CuAl showed a significant difference in volume before and after MAR application. However, no significant difference after MAR was observed (P > .05) relative to positions and FOVs. MAR had an impact on the cylinder volumes only in the NewTom VGi evo and ProMax 3-D Max scanners. CONCLUSIONS The performance of MAR algorithms in volume correction of metal objects is dependent on the materials and the CBCT unit.
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Affiliation(s)
- Karla de Faria Vasconcelos
- OMFS IMPATH research group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Division of Oral Radiology, Department of Oral Diagnosis, School of Dentistry of Piracicaba, University of Campinas, Piracicaba, Sao Paulo, Brazil.
| | - Polyane Mazucatto Queiroz
- Division of Oral Radiology, Department of Oral Diagnosis, School of Dentistry of Piracicaba, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Marina Codari
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
| | - Laura Ferreira Pinheiro Nicolielo
- OMFS IMPATH research group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Deborah Queiroz Freitas
- Division of Oral Radiology, Department of Oral Diagnosis, School of Dentistry of Piracicaba, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Reinhilde Jacobs
- OMFS IMPATH research group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Francisco Haiter-Neto
- Division of Oral Radiology, Department of Oral Diagnosis, School of Dentistry of Piracicaba, University of Campinas, Piracicaba, Sao Paulo, Brazil
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21
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Shujaat S, Letelier C, De Grauwe A, de Faria Vasconcelos K, Celikten B, Jacobs R. Observer preference for a dedicated medical display vs a standard screen in the detection of dental radioanatomic features. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:217-224. [PMID: 32220597 DOI: 10.1016/j.oooo.2020.02.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 02/07/2020] [Accepted: 02/14/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The aim of this study was to assess observers' preference for a dentomaxillofacial dedicated medical display (MD) vs a general-purpose standard screen (SS) for in vitro and in vivo observation of normal radioanatomic features. STUDY DESIGN The in vitro sample consisted of 2-dimensional (2-D) intraoral (n = 15), panoramic (n = 2), cephalometric (n = 2), and 3-dimensional (3-D) cone beam computed tomography (CBCT) (n = 9) data sets, acquired by utilizing commercially available skull and head-and-neck phantoms. The in vivo sample consisted of 80 radiographs (intraoral = 20; panoramic = 20; cephalometric = 20; and CBCT = 20). In vitro and in vivo data sets were both acquired by using Minray, Promax2-D, and Vistapano Ceph for 2-D images and Accuitomo, NewTom VGi evo, and Promax3-D for CBCT images. Five observers entered screen preferences when evaluating the appearance of radioanatomic structures on MD and SS. RESULTS Both in vitro and in vivo assessments showed good interobserver and excellent intraobserver agreement. In vitro data suggested a significant preference for MD over SS for viewing radioanatomic features on panoramic and CBCT images, whereas MD was significantly preferred for in vivo images of all imaging modalities (P < .001). CONCLUSIONS Overall, observers preferred MD over SS for both in vitro and in vivo observation of normal radioanatomic features irrespective of the imaging modality.
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Affiliation(s)
- Sohaib Shujaat
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
| | - Carolina Letelier
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Oral and Maxillofacial Radiology, University of Los Andes, Santiago, Chile
| | - Annelore De Grauwe
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Sao Paulo, Brazil
| | - Berkan Celikten
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven & Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Sweden
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22
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Martins LAC, Queiroz PM, Nejaim Y, Vasconcelos KDF, Groppo FC, Haiter-Neto F. Evaluation of metal artefacts for two CBCT devices with a new dental arch phantom. Dentomaxillofac Radiol 2020; 49:20190385. [PMID: 32155087 DOI: 10.1259/dmfr.20190385] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVES To create a new phantom design to evaluate the real impact of artefacts caused by titanium on bone structures in cone beam CT images considering different positions and quantity of metals in the dental arch, with and without metal artefact reduction (MAR). METHODS A three cylindrical polymethyl methacrylate (PMMA) plate phantom was designed containing eight perforations arranged to simulate the lower dental arch in the intermediate plate. Three titanium cylinders were positioned in different locations and quantities to test different clinical conditions and to quantify the impact of the metal artefact around five bone cylinders. Scans were carried out in seven different protocols (Control, A-F) in two cone beam CT devices (OP300 Maxio and Picasso Trio). Eight regions of interest around each cortical and trabecular bone were used to measure the grey value standard deviation corresponding the artefact expression in the Image J software. Both the artefact expression and the MAR effect were assessed using the Wilcoxon, Friedman (Dunn) and Kruskal-Wallis tests (significance level of 5%). RESULTS For both devices, MAR was statistically efficient only for the protocols E, and F. Protocol F (three metals on the adjacent area of the analysis region) showed higher artefact expression when compared to the others. CONCLUSION In conclusion, the new phantom design allowed the quantification of the metal artefact expression caused by titanium. The metal artefact expression is higher when more metal objects are positioned in the adjacent bone structures. MAR may not be effective to reduce artefact expression on the adjacencies of those objects for the devices studied.
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Affiliation(s)
- Luciano Augusto Cano Martins
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
| | - Polyane Mazucatto Queiroz
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
| | - Yuri Nejaim
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
| | - Karla de Faria Vasconcelos
- Department of Imaging & Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Francisco Carlos Groppo
- Department of Physiological Sciences, Division of Pharmacology, Piracicaba Dental School, University of Campinas (UNICAMP), Campinas, Brazil
| | - Francisco Haiter-Neto
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
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23
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Leite AF, Vasconcelos KDF, Willems H, Jacobs R. Radiomics and Machine Learning in Oral Healthcare. Proteomics Clin Appl 2020; 14:e1900040. [PMID: 31950592 DOI: 10.1002/prca.201900040] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 12/09/2019] [Indexed: 12/12/2022]
Abstract
The increasing storage of information, data, and forms of knowledge has led to the development of new technologies that can help to accomplish complex tasks in different areas, such as in dentistry. In this context, the role of computational methods, such as radiomics and Artificial Intelligence (AI) applications, has been progressing remarkably for dentomaxillofacial radiology (DMFR). These tools bring new perspectives for diagnosis, classification, and prediction of oral diseases, treatment planning, and for the evaluation and prediction of outcomes, minimizing the possibilities of human errors. A comprehensive review of the state-of-the-art of using radiomics and machine learning (ML) for imaging in oral healthcare is presented in this paper. Although the number of published studies is still relatively low, the preliminary results are very promising and in a near future, an augmented dentomaxillofacial radiology (ADMFR) will combine the use of radiomics-based and AI-based analyses with the radiologist's evaluation. In addition to the opportunities and possibilities, some challenges and limitations have also been discussed for further investigations.
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Affiliation(s)
- André Ferreira Leite
- Department of Dentistry, Faculty of Health Sciences, University of Brasília, Brasília, 70910-900, Brazil.,Omfsimpath Research Group, Department of Imaging and Pathology, Biomedical Sciences, KU Leuven and Dentomaxillofacial Imaging Department, University Hospitals Leuven, Leuven, 3000, Belgium
| | - Karla de Faria Vasconcelos
- Omfsimpath Research Group, Department of Imaging and Pathology, Biomedical Sciences, KU Leuven and Dentomaxillofacial Imaging Department, University Hospitals Leuven, Leuven, 3000, Belgium
| | - Holger Willems
- Relu, Innovatie-en incubatiecentrum KU Leuven, Leuven, 3000, Belgium
| | - Reinhilde Jacobs
- Omfsimpath Research Group, Department of Imaging and Pathology, Biomedical Sciences, KU Leuven and Dentomaxillofacial Imaging Department, University Hospitals Leuven, Leuven, 3000, Belgium.,Department of Dental Medicine, Karolinska Institutet, Huddinge, 17177, Sweden
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Verhelst PJ, Shaheen E, de Faria Vasconcelos K, Van der Cruyssen F, Shujaat S, Coudyzer W, Salmon B, Swennen G, Politis C, Jacobs R. Validation of a 3D CBCT-based protocol for the follow-up of mandibular condyle remodeling. Dentomaxillofac Radiol 2019; 49:20190364. [PMID: 31674794 PMCID: PMC7068073 DOI: 10.1259/dmfr.20190364] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Three-dimensional models of mandibular condyles provide a way for condylar remodeling follow-up. The overall aim was to develop and validate a user-friendly workflow for cone beam CT (CBCT)-based semi-automatic condylar registration and segmentation. METHODS A rigid voxel-based registration (VBR) technique for registration of two post-operative CBCT-scans was tested. Two modified mandibular rami, with or without gonial angle, were investigated as the volume of interest for registration. Inter- and intraoperator reproducibility of this technique was tested on 10 mandibular rami of orthognathic patients by means of intraclass correlation coefficients (ICC's) and descriptive statistics of the transformation values from the VBR. The difference in reproducibility between the two modified rami was evaluated using a paired t-test (p < 0.05). For the segmentation, eight fresh frozen cadaver heads were scanned with CBCT and micro-CT. These data were used to test the inter- and intraoperator reproducibility (ICC's) and accuracy (Bland-Altman plot) of a newly designed workflow based on semi-automated contour enhancement. RESULTS Excellent ICC's (0.94-0.99) were obtained for the voxel-based registration technique using both modified rami. If the gonial angle was not included in the volume of interest, there was a trend of increased operator error suggested by significant higher interoperator differences in translation values (p = 0,0036). The segmentation workflow proved to be highly reproducible with excellent ICC's (0.99), low absolute mean volume differences between operators (23.19 mm3), within operators (28.93 mm3) and low surface distances between models of different operators (<0.20 mm). Regarding the accuracy, CBCT-models slightly overestimate the condylar volume compared to micro-CT. CONCLUSIONS This study provides a validated user-friendly and reproducible method of creating three-dimensional-surface models of mandibular condyles out of longitudinal CBCT-scans.
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Affiliation(s)
- Pieter-Jan Verhelst
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Eman Shaheen
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Fréderic Van der Cruyssen
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Sohaib Shujaat
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Walter Coudyzer
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - Benjamin Salmon
- Orofacial Pathologies, Imaging and Biotherapies EA2496 Lab, University of Paris, Montrouge, France.,Dental Medicine Department, AP-HP, Bretonneau Hospital, Paris, France
| | - Gwen Swennen
- Division of Maxillofacial Surgery, Department of Surgery, AZ Sint-Jan Brugge-Oostende AV, Bruges, Belgium
| | - Constantinus Politis
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
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25
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Vanderstuyft T, Tarce M, Sanaan B, Jacobs R, de Faria Vasconcelos K, Quirynen M. Inaccuracy of buccal bone thickness estimation on cone‐beam CT due to implant blooming: An ex‐vivo study. J Clin Periodontol 2019; 46:1134-1143. [DOI: 10.1111/jcpe.13183] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/30/2019] [Accepted: 08/21/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Tony Vanderstuyft
- Section of Periodontology Department of Oral Health Sciences KU Leuven & Dentistry University Hospitals Leuven Belgium
| | - Mihai Tarce
- Section of Periodontology Department of Oral Health Sciences KU Leuven & Dentistry University Hospitals Leuven Belgium
| | - Bahoz Sanaan
- Section of Periodontology Department of Oral Health Sciences KU Leuven & Dentistry University Hospitals Leuven Belgium
| | - Reinhilde Jacobs
- OMFS‐IMPATH Research Group Department of Imaging and Pathology Faculty of Medicine University of Leuven Leuven Belgium
- Department of Oral & Maxillofacial Surgery University Hospitals Leuven Leuven Belgium
| | - Karla de Faria Vasconcelos
- OMFS‐IMPATH Research Group Department of Imaging and Pathology Faculty of Medicine University of Leuven Leuven Belgium
- Department of Oral & Maxillofacial Surgery University Hospitals Leuven Leuven Belgium
| | - Marc Quirynen
- Section of Periodontology Department of Oral Health Sciences KU Leuven & Dentistry University Hospitals Leuven Belgium
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26
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Freire BB, Nascimento EHL, Vasconcelos KDF, Freitas DQ, Haiter-Neto F. Radiologic assessment of mandibular third molars: an ex vivo comparative study of panoramic radiography, extraoral bitewing radiography, and cone beam computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol 2019; 128:166-175. [DOI: 10.1016/j.oooo.2018.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 11/01/2018] [Accepted: 11/10/2018] [Indexed: 11/28/2022]
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Vasconcelos KDF, Codari M, Queiroz PM, Nicolielo LFP, Freitas DQ, Sforza C, Jacobs R, Haiter-Neto F. The performance of metal artifact reduction algorithms in cone beam computed tomography images considering the effects of materials, metal positions, and fields of view. Oral Surg Oral Med Oral Pathol Oral Radiol 2019; 127:71-76. [DOI: 10.1016/j.oooo.2018.09.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 09/11/2018] [Accepted: 09/18/2018] [Indexed: 01/08/2023]
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28
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Van der Cruyssen F, de Faria Vasconcelos K, Verhelst PJ, Shujaat S, Delsupehe AM, Hauben E, Orhan K, Politis C, Jacobs R. Metal debris after dental implant placement: A proof-of-concept study in fresh frozen cadavers using MRI and histological analysis. Int J Oral Implantol (Berl) 2019; 12:349-356. [PMID: 31535103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
PURPOSE This report originated from the finding of metal artefacts on magnetic resonance images (MRI) which were not detected on panoramic radiography or cone beam computed tomography (CBCT) imaging. It was hypothesised that drills or implants might release metal particles during surgical procedures in the jawbones. Therefore, the aim was to assess whether dental implants or surgical drills might cause metal debris in the surrounding tissues. MATERIALS AND METHODS The experiment consisted of a postmortem and an antemortem model. A split-mouth design was carried out in a postmortem fresh frozen cadaver head. In the left mandible only the drill preparation sequence was performed, whereas in the right mandible, the drill sequence was followed by implant placement. Before surgery, the postmortem model underwent a baseline MRI acquisition. A second MRI (MRI2) was acquired after performing the osteotomies on both sides and implant placement on the right side. Finally, the implants were carefully removed, and a final MRI (MRI3) was acquired. Bone blocks containing the implant and osteotomy sites were isolated. For the antemortem model, a fresh frozen cadaver head was selected that already had implants in place. An implant in the anterior maxilla was removed and the surrounding bone block was isolated as well. A histological analysis was prepared for both models. RESULTS In the antemortem model, histological analysis showed irregular-shaped dark particles near the bone-implant interface consistent with metal debris. Additionally, in the postmortem model, both sites showed metal artefacts on MRI2 and MRI3, and by using a balanced fast field echo sequence, and histological analysis, the suspected particles of metal debris were confirmed on both sides of the mandible. CONCLUSIONS Further studies should investigate the origin and extent of the metal debris following implant placement, as well as its clinical significance, possible risk factors and preventive measures.
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Celikten B, Jacobs R, de Faria Vasconcelos K, Huang Y, Shaheen E, Nicolielo LFP, Orhan K. Comparative evaluation of cone beam CT and micro-CT on blooming artifacts in human teeth filled with bioceramic sealers. Clin Oral Investig 2018; 23:3267-3273. [DOI: 10.1007/s00784-018-2748-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 11/19/2018] [Indexed: 12/01/2022]
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Lopes PA, Santaella GM, Lima CAS, Vasconcelos KDF, Groppo FC. Evaluation of soft tissues simulant materials in cone beam computed tomography. Dentomaxillofac Radiol 2018; 48:20180072. [PMID: 30004256 DOI: 10.1259/dmfr.20180072] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To evaluate different materials in simulating soft tissues and to analyze the influence of these materials on the mean (MPIV) and standard deviation of pixel intensity values comparing them to a gold-standard in CBCT images. METHODS Images of three piglet heads with their soft tissues intact (gold-standard) and different simulant materials were acquired: ice, modelling wax, and ballistic gelatin, with the same thickness of the original soft tissues. The pixel intensities were measured in dental, bone and soft tissues regions, in the mandible and maxilla, for all the groups. Analysis of variance, Dunnet's, Pearson's and linear regression tests were performed. RESULTS The simulators did not significantly change the MPIV of teeth in comparison with the gold-standard (p = 0.1017). Only ice (p = 0.0156) affected the MPIV of bone. Wax (p = 0.001) and ice (p = 0.0076), but not ballistic gelatin (p = 0.5814), altered the MPIV of soft tissue regions. When assessing the influence of the location (mandible or maxilla) among the simulants, the differences were significant only for the soft tissue regions. Standard deviation was not influenced by simulants (p > 0.05), but ballistic gelatin presented the lower variability. CONCLUSIONS The ballistic gelatin was the best soft tissue simulant since it had the lowest influence on the pixel intensity values for all regions.
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Affiliation(s)
- Priscila A Lopes
- Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Gustavo M Santaella
- Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Carlos Augusto S Lima
- Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Karla de Faria Vasconcelos
- Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Francisco C Groppo
- Department of Physiological Sciences, University of Campinas, Piracicaba, São Paulo, Brazil
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Orhan K, Jacobs R, Celikten B, Huang Y, de Faria Vasconcelos K, Nicolielo LFP, Buyuksungur A, Van Dessel J. Evaluation of Threshold Values for Root Canal Filling Voids in Micro-CT and Nano-CT Images. Scanning 2018; 2018:9437569. [PMID: 30116470 PMCID: PMC6079325 DOI: 10.1155/2018/9437569] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 06/05/2018] [Indexed: 06/08/2023]
Abstract
While several materials and techniques have been used to assess the quality of root canal fillings in micro-CT images, the lack of standardization in scanning protocols has produced conflicting results. Hence, the aim of this study was to determine a cutoff voxel size value for the assessment of root canal filling voids in micro-CT and nano-CT images. Twenty freshly extracted mandibular central incisors were used. Root canals were prepared with nickel titanium files to an ISO size 40/0.06 taper and then filled with a single cone (40/0.06 taper) and AH Plus sealer. The teeth were scanned with different voxel sizes with either micro-CT (5.2, 8.1, 11.2, and 16.73 μm) or nano-CT (1.5 and 5.0 μm) equipment. Images were reconstructed and analyzed with the NRecon and CTAn software. Void proportion and void volume were calculated for each tooth in the apical, middle, and coronal thirds of the root canal. Kruskal-Wallis and post hoc Mann-Whitney U tests were performed with a significance level of 5%. In micro-CT images, significantly different results were detected among the tested voxel sizes for void proportion and void volume, whereas no such differences were found in nano-CT images (p > 0.05). Micro-CT images showed higher void numbers over the entire root length, with statistically significant differences between the voxel size of 16.73 μm and the other sizes (p < 0.05). The values of the different nano-CT voxel sizes did not significantly differ from those of the micro-CT (5.2, 8.1, and 11.2 μm), except for the voxel size of 16.73 μm (p < 0.05). All tested voxel sizes enabled the detection of root canal filling voids except for the voxel size of 16.73 μm. Bearing in mind the limitations of this study, it seems that a voxel size of 11.2 μm can be used as a reliable cutoff value for the assessment of root canal filling voids in micro-CT imaging.
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Affiliation(s)
- Kaan Orhan
- Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Ankara University, Ankara, Turkey
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
- Oral Facial Diagnostics and Surgery, Department of Dental Medicine, Karolinska Institutet, Solna, Sweden
| | - Berkan Celikten
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
- Faculty of Dentistry, Department of Endodontics, Ankara University, Ankara, Turkey
| | - Yan Huang
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | - Karla de Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil
| | - Laura Ferreira Pinheiro Nicolielo
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | | | - Jeroen Van Dessel
- OMFS IMPATH Research Group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
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Rovaris K, Queiroz PM, Vasconcelos KDF, Corpas LDS, Silveira BMD, Freitas DQ. Segmentation Methods for Micro CT Images: A Comparative Study Using Human Bone Samples. Braz Dent J 2018; 29:150-153. [DOI: 10.1590/0103-6440201801385] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 11/13/2017] [Indexed: 11/22/2022] Open
Abstract
Abstract X-ray microtomography (microCT) is a nondestructive technique used to assess bone morphometry. For an accurate analysis, it is necessary to segment the bone tissue from the background images, avoiding under- or overestimation of the real bone volume. Thus, segmentation methods for microCT can influence the accuracy of bone morphometry analysis. The purpose of this study was to compare two different image segmentation methods available on microCT software (subjective and objective) regarding to the human bone morphometric analysis. Sixteen samples containing a fixation screws covered by 0.5-1mm of bone were scanned using the SkyScan 1173 scanner. Three examiners segmented the microCT images subjectively and recorded the threshold values. Subsequently, an objective segmentation was also done. The 3D analysis was performed for both images using the values previously determined in CTAn software. Five bone morphometric parameters were calculated (BV/TV, Tb.Th, Tb.N, Tb.Sp, Conn.Den) and used as dependent variables. ANOVA showed no significant differences between the methods concerning BV/TV (p=0.424), Tb.N (p=0.672), Tb.Th (p=0.183), Tb.Sp (p=0.973) and Conn.Den (p=0.204). Intra- and interobserver agreement ranged from satisfactory to excellent (0.55-1 and 0.546-0.991, respectively). Therefore, results obtained with subjective threshorlding were similar to those obtained with objective segmentation. Since objective segmentation does not have human input and it is a truly objective method, it should be the first choice in microCT studies that concern homogeneity and high resolution human bone sample.
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Oenning AC, Salmon B, Vasconcelos KDF, Pinheiro Nicolielo LF, Lambrichts I, Sanderink G, Pauwels R, Jacobs R. DIMITRA paediatric skull phantoms: development of age-specific paediatric models for dentomaxillofacial radiology research. Dentomaxillofac Radiol 2018; 47:20170285. [PMID: 29161909 DOI: 10.1259/dmfr.20170285] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES This report aims to describe the development of age-specific phantoms for use in paediatric dentomaxillofacial radiology research. These phantoms are denoted DIMITRA paediatric skull phantoms as these have been primarily developed and validated for the DIMITRA European research project (Dentomaxillofacial paediatric imaging: an investigation towards low-dose radiation induced risks). METHODS To create the DIMITRA paediatric phantoms, six human paediatric skulls with estimated ages ranging between 4 and 10 years- old were selected, protected with non-radiopaque tape and immersed in melted Mix-D soft tissue equivalent material, by means of a careful procedure (layer-by-layer). Mandibles were immersed separately and a Mix-D tongue model was also created. For validation purposes, the resulting paediatric phantoms were scanned using a cone-beam CT unit with different exposure parameter settings. RESULTS Preliminary images deriving from all scans were evaluated by two dentomaxillofacial radiologists, to check for air bubbles, artefacts and inhomogeneities of the Mix-D and a potential effect on the visualization of the jaw bone. Only skulls presenting perfect alignment of Mix-D surrounding the bone surfaces with adequate and realistic soft tissue thickness density were accepted. CONCLUSIONS The DIMITRA anthropomorphic phantoms can yield clinically equivalent images for optimization studies in dentomaxillofacial research. In addition, the layer-by-layer technique proved to be practical and reproducible, as long as recommendations are carefully followed.
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Affiliation(s)
- Anne Caroline Oenning
- 1 Department of Dental Medicine,Orofacial Pathologies Imaging and Biotherapies Lab, Paris Descartes University Sorbonne Paris Cité Bretonneau Hospital , Paris , France.,2 Department of Oral Diagnosis,Division of Oral Radiology, Piracicaba Dental School, University of Campinas , Piracicaba, Sao Paulo , Brazil
| | - Benjamin Salmon
- 1 Department of Dental Medicine,Orofacial Pathologies Imaging and Biotherapies Lab, Paris Descartes University Sorbonne Paris Cité Bretonneau Hospital , Paris , France
| | - Karla de Faria Vasconcelos
- 2 Department of Oral Diagnosis,Division of Oral Radiology, Piracicaba Dental School, University of Campinas , Piracicaba, Sao Paulo , Brazil.,3 Department of Imaging and Pathology,OMFS IMPATH research group, Catholic University of Leuven, University Hospitals Leuven , Leuven , Belgium
| | - Laura Ferreira Pinheiro Nicolielo
- 3 Department of Imaging and Pathology,OMFS IMPATH research group, Catholic University of Leuven, University Hospitals Leuven , Leuven , Belgium
| | - Ivo Lambrichts
- 4 Department of Morphology, Biomedical Research Institute, University of Hasselt , Hasselt , Belgium
| | - Gerard Sanderink
- 5 Department of Oral Radiology,Academic Center for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit , Amsterdam , Netherlands
| | - Ruben Pauwels
- 3 Department of Imaging and Pathology,OMFS IMPATH research group, Catholic University of Leuven, University Hospitals Leuven , Leuven , Belgium.,6 Department of Radiology,Faculty of Dentistry, Chulalongkorn University , Bangkok , Thailand
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- 7 DIMITRA group available at www.dimitra.be , Leuven , Belgium
| | - Reinhilde Jacobs
- 3 Department of Imaging and Pathology,OMFS IMPATH research group, Catholic University of Leuven, University Hospitals Leuven , Leuven , Belgium.,8 Department of Dental Medicine,Karolinska Institutet , Stockholm , Sweden
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Huang Y, Celikten B, de Faria Vasconcelos K, Ferreira Pinheiro Nicolielo L, Lippiatt N, Buyuksungur A, Jacobs R, Orhan K. Micro-CT and nano-CT analysis of filling quality of three different endodontic sealers. Dentomaxillofac Radiol 2017; 46:20170223. [PMID: 28845679 PMCID: PMC5965939 DOI: 10.1259/dmfr.20170223] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 07/23/2017] [Accepted: 08/07/2017] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To investigate voids in different root canal sealers using micro-CT and nano-CT, and to explore the feasibility of using nano-CT for quantitative analysis of sealer filling quality. METHODS 30 extracted mandibular central incisors were randomly assigned into three groups according to the applied root canal sealers (Total BC Sealer, Sure Seal Root, AH Plus) by the single cone technique. Subsequently, micro-CT and nano-CT were performed to analyse the incidence rate of voids, void fraction, void volume and their distribution in each sample. RESULTS Micro-CT evaluation showed no significant difference among sealers for the incidence rate of voids or void fraction in the whole filling materials (p > 0.05), whereas a significant difference was found between AH Plus and the other two sealers using nano-CT (p < 0.05). All three sealers presented less void volume in the apical third; however, higher void volumes were observed in the apical and coronal thirds in AH Plus using micro-CT (p < 0.05), while nano-CT results displayed higher void volume in AH Plus among all the sealers and regions (p < 0.05). CONCLUSIONS Bioactive sealers showed higher root filling rate, lower incidence rate of voids, void fraction and void volume than AH Plus under nano-CT analysis, when round root canals were treated by the single cone technique. The disparate results suggest that the higher resolution of nano-CT have a greater ability of distinguishing internal porosity, and therefore suggesting the potential use of nano-CT in quantitative analysis of filling quality of sealers.
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Affiliation(s)
| | | | | | | | - Nicholas Lippiatt
- BIOMATEN and Department of Biotechnology, Middle East Technical University, Ankara, Turkey
| | - Arda Buyuksungur
- Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | | | - Kaan Orhan
- Department of DentoMaxillofacial Radiology, Ankara University, Ankara, Turkey
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Vasconcelos KDF, Rovaris K, Nascimento EHL, Oliveira ML, Távora DDM, Bóscolo FN. Diagnostic accuracy of phosphor plate systems and conventional radiography in the detection of simulated internal root resorption. Acta Odontol Scand 2017; 75:573-576. [PMID: 28754080 DOI: 10.1080/00016357.2017.1359331] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To evaluate the performance of conventional radiography and photostimulable phosphor (PSP) plate in the detection of simulated internal root resorption (IRR) lesions in early stages. MATERIALS AND METHODS Twenty single-rooted teeth were X-rayed before and after having a simulated IRR early lesion. Three imaging systems were used: Kodak InSight dental film and two PSPs digital systems, Digora Optime and VistaScan. The digital images were displayed on a 20.1″ LCD monitor using the native software of each system, and the conventional radiographs were evaluated on a masked light box. Two radiologists were asked to indicate the presence or absence of IRR and, after two weeks, all images were re-evaluated. Cohen's kappa coefficient was calculated to assess intra- and interobserver agreement. The three imaging systems were compared using the Kruskal-Wallis test. RESULTS For interexaminer agreement, overall kappa values were 0.70, 0.65 and 0.70 for conventional film, Digora Optima and VistaScan, respectively. Both the conventional and digital radiography presented low sensitivity, specificity, accuracy, positive and negative predictive values with no significant difference between imaging systems (p = .0725). CONCLUSIONS The performance of conventional and PSP was similar in the detection of simulated IRR lesions in early stages with low accuracy.
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Affiliation(s)
- Karla de Faria Vasconcelos
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Karla Rovaris
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | | | - Matheus Lima Oliveira
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Débora de Melo Távora
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Frab Norberto Bóscolo
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
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Codari M, de Faria Vasconcelos K, Ferreira Pinheiro Nicolielo L, Haiter Neto F, Jacobs R. Quantitative evaluation of metal artifacts using different CBCT devices, high-density materials and field of views. Clin Oral Implants Res 2017; 28:1509-1514. [DOI: 10.1111/clr.13019] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/14/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Marina Codari
- OIC; OMFS IMPATH Research Group; Department Imaging & Pathology; Faculty of Medicine; KU Leuven and Oral and Maxillofacial Surgery; University Hospitals Leuven; Leuven Belgium
- Department of Biomedical Sciences for Health; Faculty of Medicine and Surgery; Università degli Studi di Milano; Milano Italy
| | - Karla de Faria Vasconcelos
- OIC; OMFS IMPATH Research Group; Department Imaging & Pathology; Faculty of Medicine; KU Leuven and Oral and Maxillofacial Surgery; University Hospitals Leuven; Leuven Belgium
- Division of Oral Radiology; Department of Oral Diagnosis; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
| | - Laura Ferreira Pinheiro Nicolielo
- OIC; OMFS IMPATH Research Group; Department Imaging & Pathology; Faculty of Medicine; KU Leuven and Oral and Maxillofacial Surgery; University Hospitals Leuven; Leuven Belgium
| | - Francisco Haiter Neto
- Division of Oral Radiology; Department of Oral Diagnosis; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
| | - Reinhilde Jacobs
- OIC; OMFS IMPATH Research Group; Department Imaging & Pathology; Faculty of Medicine; KU Leuven and Oral and Maxillofacial Surgery; University Hospitals Leuven; Leuven Belgium
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Rovaris K, de Faria Vasconcelos K, do Nascimento EHL, Oliveira ML, Freitas DQ, Haiter-Neto F. Brazilian young dental practitioners' use and acceptance of digital radiographic examinations. Imaging Sci Dent 2016; 46:239-244. [PMID: 28035301 PMCID: PMC5192021 DOI: 10.5624/isd.2016.46.4.239] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 06/12/2016] [Accepted: 06/29/2016] [Indexed: 12/03/2022] Open
Abstract
Purpose The aim of this study was to investigate the use and acceptance of digital radiographic examinations by Brazilian dental practitioners in daily practice and to evaluate the advances that have occurred over the past 5 years. Materials and Methods Dental practitioners enrolled in extension courses at the Piracicaba Dental School, University of Campinas, Brazil, responded to a self-administered questionnaire in the years 2011 and 2015. They were asked about sociodemographic factors and their knowledge and use of digital radiographic examinations. Descriptive analysis was performed, as well as the chi-square and Fisher exact tests, with a significance level of 5% (α=0.05). Results A total of 181 participants responded to the questionnaire in the years 2011 and 2015. Most of the respondents worked in private practice, had graduated within the last 5 years, and were between 20 and 30 years old. In 2011, 55.6% of respondents reported having ever used digital radiographic examinations, while in 2015 this number increased significantly to 85.4% (p<.0001), out of which 71.4% preferred it to conventional images. Moreover, 21.4% of respondents reported having used digital radiographic examinations for more than 3 years. A significant increase in use of intraoral digital radiography (p=0.0316) was observed in 2015. In both years, image quality and high cost were indicated, respectively, as the main advantage and disadvantage of digital radiographic examinations. Conclusion This study showed that digital radiology has become more common in Brazil over the past 5 years. Most of the Brazilian dental practitioners evaluated in 2015 used digital radiographic examinations.
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Affiliation(s)
- Karla Rovaris
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
| | - Karla de Faria Vasconcelos
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
| | | | - Matheus Lima Oliveira
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
| | - Deborah Queiroz Freitas
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
| | - Francisco Haiter-Neto
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Sao Paulo, Brazil
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Vasconcelos KDF, de-Azevedo-Vaz SL, Freitas DQ, Haiter-Neto F. CBCT Post-Processing Tools to Manage the Progression of Invasive Cervical Resorption: A Case Report. Braz Dent J 2016; 27:476-80. [DOI: 10.1590/0103-6440201600740] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 04/29/2016] [Indexed: 11/22/2022] Open
Abstract
Abstract This case report aimed to highlight the usefulness of cone beam computed tomography (CBCT) and its post-processing tools for the diagnosis, follow-up and treatment planning of invasive cervical resorption (ICR). A 16-year-old female patient was referred for periapical radiographic examination, which revealed an irregular but well demarcated radiolucency in the mandibular right central incisor. In addition, CBCT scanning was performed to distinguish between ICR and internal root resorption. After the diagnosis of ICR, the patient was advised to return shortly but did so only six years later. At that time, another CBCT scan was performed and CBCT registration and subtraction were done to document lesion progress. These imaging tools were able to show lesion progress and extent clearly and were fundamental for differential diagnosis and treatment decision.
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de Faria Vasconcelos K, dos Santos Corpas L, da Silveira BM, Laperre K, Padovan LE, Jacobs R, de Freitas PHL, Lambrichts I, Bóscolo FN. MicroCT assessment of bone microarchitecture in implant sites reconstructed with autogenous and xenogenous grafts: a pilot study. Clin Oral Implants Res 2016; 28:308-313. [DOI: 10.1111/clr.12799] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2016] [Indexed: 12/01/2022]
Affiliation(s)
- Karla de Faria Vasconcelos
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
| | - Lívia dos Santos Corpas
- Department of Prosthetic Dentistry, Oral Health Sciences, Faculty of Medicine; Katholieke Universiteit Leuven; Leuven Belgium
| | | | | | - Luis Eduardo Padovan
- Department of Implant Dentistry; Latin American Institute for Dental Research and Training (ILAPEO); Curitiba Brazil
| | - Reinhilde Jacobs
- OMFS Impath Research Group, Department of Imaging & Pathology, Faculty of Medicine; University of Leuven; Leuven Belgium
- Department of Maxillofacial Surgery; Leuven University Hospital; Leuven Belgium
| | | | - Ivo Lambrichts
- Biomedical Research Institute, Laboratory of Morphology; Hasselt University; Diepenbeek Belgium
| | - Frab Norberto Bóscolo
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
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de-Azevedo-Vaz SL, Peyneau PD, Ramirez-Sotelo LR, Vasconcelos KDF, Campos PSF, Haiter-Neto F. Efficacy of a cone beam computed tomography metal artifact reduction algorithm for the detection of peri-implant fenestrations and dehiscences. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 121:550-6. [PMID: 27068312 DOI: 10.1016/j.oooo.2016.01.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 12/06/2015] [Accepted: 01/18/2016] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To determine whether the use of a metal artifact reduction (MAR) algorithm improves the detection of peri-implant fenestrations and dehiscences on cone beam computed tomography scans. STUDY DESIGN One hundred titanium fixtures were implanted into bovine ribs after the creation of defects simulating fenestrations and dehiscences. Images were acquired using four different protocols, namely, A2 (MAR on, voxel 0.2 mm), A3 (MAR on, voxel 0.3 mm), B2 (MAR off, voxel 0.2 mm), and B3 (MAR off, voxel 0.3 mm). For all protocols, receiver operating characteristic (ROC) curves were determined. Values for the areas under the ROC curves (Az) were subjected to analysis of variance. RESULTS Az values were not statistically different among protocols regardless of the defect type (P > .05). CONCLUSIONS The MAR algorithm tested by us did not improve the diagnosis of peri-implant fenestrations and dehiscences with use of either the 0.2 mm or the 0.3 mm voxel sizes.
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Affiliation(s)
- Sergio Lins de-Azevedo-Vaz
- Department of Clinical Dentistry, Faculty of Dentistry, Federal University of Espirito Santo, Vitoria, Espirito Santo, Brazil.
| | - Priscila Dias Peyneau
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Laura Ricardina Ramirez-Sotelo
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Karla de Faria Vasconcelos
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Sao Paulo, Brazil
| | - Paulo Sérgio Flores Campos
- Department of Oral Radiology, Division of Oral Radiology, School of Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Francisco Haiter-Neto
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Sao Paulo, Brazil
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Pittayapat P, Jacobs R, Odri GA, Vasconcelos KDF, Willems G, Olszewski R. Reproducibility of the sella turcica landmark in three dimensions using a sella turcica-specific reference system. Imaging Sci Dent 2015; 45:15-22. [PMID: 25793179 PMCID: PMC4362987 DOI: 10.5624/isd.2015.45.1.15] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 10/16/2014] [Accepted: 11/03/2014] [Indexed: 11/18/2022] Open
Abstract
Purpose This study was performed to assess the reproducibility of identifying the sella turcica landmark in a three-dimensional (3D) model by using a new sella-specific landmark reference system. Materials and Methods Thirty-two cone-beam computed tomographic scans (3D Accuitomo® 170, J. Morita, Kyoto, Japan) were retrospectively collected. The 3D data were exported into the Digital Imaging and Communications in Medicine standard and then imported into the Maxilim® software (Medicim NV, Sint-Niklaas, Belgium) to create 3D surface models. Five observers identified four osseous landmarks in order to create the reference frame and then identified two sella landmarks. The x, y, and z coordinates of each landmark were exported. The observations were repeated after four weeks. Statistical analysis was performed using the multiple paired t-test with Bonferroni correction (intraobserver precision: p<0.005, interobserver precision: p<0.0011). Results The intraobserver mean precision of all landmarks was <1 mm. Significant differences were found when comparing the intraobserver precision of each observer (p<0.005). For the sella landmarks, the intraobserver mean precision ranged from 0.43±0.34 mm to 0.51±0.46 mm. The intraobserver reproducibility was generally good. The overall interobserver mean precision was <1 mm. Significant differences between each pair of observers for all anatomical landmarks were found (p<0.0011). The interobserver reproducibility of sella landmarks was good, with >50% precision in locating the landmark within 1 mm. Conclusion A newly developed reference system offers high precision and reproducibility for sella turcica identification in a 3D model without being based on two-dimensional images derived from 3D data.
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Affiliation(s)
- Pisha Pittayapat
- OIC, OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium. ; Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Reinhilde Jacobs
- OIC, OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Guillaume A Odri
- Service de Chirurgie Orthopédique et Traumatologique, Centre Hospitalier Régional d'Orléans, Orléans Cedex 2, France
| | - Karla de Faria Vasconcelos
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Guy Willems
- Orthodontics, Department of Oral Health Sciences, KU Leuven and Dentistry, University Hospitals Leuven, University of Leuven, Leuven, Belgium
| | - Raphaël Olszewski
- Department of Oral and Maxillofacial Surgery, Cliniques Universitaires Saint Luc, Université Catholique de Louvain, Brussels, Belgium
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Moreira DD, Gribel BF, Torres GDR, Vasconcelos KDF, Freitas DQD, Ambrosano GMB. Reliability of measurements on virtual models obtained from scanning of impressions and conventional plaster models. Braz J Oral Sci 2014. [DOI: 10.1590/1677-3225v13n4a11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Vasconcelos KDF, Nejaim Y, Haiter Neto F, Bóscolo FN. Diagnosis of invasive cervical resorption by using cone beam computed tomography: report of two cases. Braz Dent J 2013; 23:602-7. [PMID: 23306242 DOI: 10.1590/s0103-64402012000500023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 10/31/2012] [Indexed: 11/21/2022] Open
Abstract
A radiographic interpretation is essential to the diagnosis of invasive cervical resorption (ICR) and the difficulty in distinguishing this lesion from internal root resorption has been highlighted in the literature. This paper reports the use of cone beam computed tomography (CBCT) in the diagnosis of ICR. The cases reports describe how CBCT can be used to make a differential diagnosis and also show that the use of this technology can provide relevant information on the location and nature of root resorption, which conventional radiographs cannot. As a result, the root canal treatment was not initially considered. The patients will be monitored and will undergo a scan after a short period of time to detect any small changes. It was observed that both cases benefited from CBCT in the diagnosis of ICR, because this imaging modality determined the real extent of resorption and possible points of communication with the periodontal space.
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Affiliation(s)
- Karla de Faria Vasconcelos
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, SP, Brazil.
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de-Azevedo-Vaz SL, Vasconcelos KDF, Rovaris K, Ferreira NDP, Haiter Neto F. A survey on dental undergraduates' knowledge of oral radiology. Braz J Oral Sci 2013. [DOI: 10.1590/s1677-32252013000200008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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de-Azevedo-Vaz SL, Vasconcelos KDF, Neves FS, Melo SLS, Campos PSF, Haiter-Neto F. Detection of periimplant fenestration and dehiscence with the use of two scan modes and the smallest voxel sizes of a cone-beam computed tomography device. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 115:121-7. [PMID: 23217543 DOI: 10.1016/j.oooo.2012.10.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 10/09/2012] [Accepted: 10/15/2012] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To assess the accuracy of cone-beam computed tomography (CBCT) in periimplant fenestration and dehiscence detection, and to determine the effects of 2 voxel sizes and scan modes. STUDY DESIGN One hundred titanium implants were placed in bovine ribs in which periimplant fenestration and dehiscence were simulated. CBCT images were acquired with the use of 3 protocols of the i-CAT NG unit: A) 0.2 mm voxel size half-scan (180°); B) 0.2 mm voxel size full-scan (360°); and C) 0.12 mm voxel size full scan (360°). Receiver operating characteristic curves and diagnostic values were obtained. The Az values were compared with the use of analysis of variance. RESULTS The Az value for dehiscence in protocol A was significantly lower than those of B or C (P < .01). They did not statistically differ for fenestration (P > .05). CONCLUSIONS Protocol B yielded the highest values. The voxel sizes did not affect fenestration and dehiscence detection, and for dehiscence full-scan performed better than half-scan.
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Affiliation(s)
- Sergio Lins de-Azevedo-Vaz
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil.
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Evangelista K, Vasconcelos KDF, Bumann A, Hirsch E, Nitka M, Silva MAG. Dehiscence and fenestration in patients with Class I and Class II Division 1 malocclusion assessed with cone-beam computed tomography. Am J Orthod Dentofacial Orthop 2010; 138:133.e1-7; discussion 133-5. [PMID: 20691344 DOI: 10.1016/j.ajodo.2010.02.021] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 02/01/2010] [Accepted: 02/01/2010] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The aim of this study was to compare the presence of alveolar defects (dehiscence and fenestration) in patients with Class I and Class II Division 1 malocclusions and different facial types. METHODS Seventy-nine Class I and 80 Class II patients with no previous orthodontic treatment were evaluated using cone-beam computed tomography. The sample included 4319 teeth. All teeth were analyzed by 2 examiners who evaluated sectional images in axial and cross-sectional views to check for the presence or absence of dehiscence and fenestration on the buccal and lingual surfaces. RESULTS Dehiscence was associated with 51.09% of all teeth, and fenestration with 36.51%. The Class I malocclusion patients had a greater prevalence of dehiscence: 35% higher than those with Class II Division 1 malocclusion (P <0.01). There was no statistically significant difference between the facial types. CONCLUSIONS Alveolar defects are a common finding before orthodontic treatment, especially in Class I patients, but they are not related to the facial types.
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