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Ferrari DR, Reis TMS, Junqueira RB, Kamburoğlu K, Küçük Ö, Verner FS. Is the assessment of the mandibular molar danger zone affected by field of view and voxel size in cone beam computed tomography examinations? Oral Surg Oral Med Oral Pathol Oral Radiol 2024; 137:662-670. [PMID: 38490929 DOI: 10.1016/j.oooo.2024.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 02/04/2024] [Accepted: 02/11/2024] [Indexed: 03/17/2024]
Abstract
OBJECTIVE To verify if assessment of the danger zone (DZ) in the mesial root of mandibular molars is affected by field of view (FOV) and voxel sizes in cone beam computed tomography (CBCT) scans. STUDY DESIGN Forty mandibular molars were scanned by micro-computed tomography, creating the reference standard. The teeth were then submitted for CBCT scans with FOVs of 10 × 5.5 cm and 5 × 5.5 cm and voxel sizes of 0.4, 0.2, 0.15, and 0.075 mm3. The smallest dentin thickness in the DZ from the mesiobuccal and mesiolingual canals was measured at 2, 4, and 6 mm apical to the root furcation. Descriptive statistics, paired t-tests, and intraclass correlation coefficients were used for statistical analysis with significance established at P < .05. RESULTS All CBCT measurements overestimated the DZ dentin thickness (P < .001) compared to the reference standard. The greatest overestimation occurred in the 5 × 5.5 cm FOV with 0.4 mm3 voxels (P = .007). Dentin thickness measured with the 5 × 5.5 cm FOV and 0.075 mm3 voxels was significantly smaller and produced the best ICC value with the reference standard (0.936). CONCLUSIONS CBCT overestimates the dentin thickness of the DZ regardless of FOV and voxel sizes. The 5 × 5.5 cm FOV showed the best performance with the 0.075 mm3 voxel size, but it performed poorly with 0.4 mm3 voxels.
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Affiliation(s)
- Daniella Ribeiro Ferrari
- Applied Health Sciences Post-Graduate Program, Federal University of Juiz de Fora, Minas Gerais, Brazil
| | - Tânia Maria Soares Reis
- Applied Health Sciences Post-Graduate Program, Federal University of Juiz de Fora, Minas Gerais, Brazil
| | - Rafael Binato Junqueira
- Applied Health Science Post-Graduate Program and Department of Dentistry, Federal University of Juiz de Fora, Minas Gerais, Brazil
| | - Kivanç Kamburoğlu
- Dentomaxillofacial Radiology Department, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - Özlem Küçük
- Department of Nuclear Medicine, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Francielle Silvestre Verner
- Applied Health Science Post-Graduate Program and Department of Dentistry, Federal University of Juiz de Fora, Minas Gerais, Brazil.
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2
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Hadilou M, Gholami L, Ghojazadeh M, Emadi N. Prevalence and extension of the anterior loop of the mental nerve in different populations and CBCT imaging settings: A systematic review and meta-analysis. Imaging Sci Dent 2022; 52:141-153. [PMID: 35799963 PMCID: PMC9226233 DOI: 10.5624/isd.20220001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 03/24/2022] [Accepted: 03/26/2022] [Indexed: 11/18/2022] Open
Abstract
Purpose Materials and Methods Results Conclusion
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Affiliation(s)
- Mahdi Hadilou
- Student Research Committee, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Leila Gholami
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada
| | - Morteza Ghojazadeh
- Research Center for Evidence Based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Naghmeh Emadi
- Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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3
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da Silveira Tiecher PF, Assein Arús N, Adams Hilgert E, Dias da Silveira HE, Pante Fontana M, Dias da Silveira HL, Vizzotto MB. Exploring digital filters for internal root resorption: how can we improve the diagnosis of small lesions? Dentomaxillofac Radiol 2021; 51:20210314. [PMID: 34767483 PMCID: PMC9499201 DOI: 10.1259/dmfr.20210314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES This study aimed to evaluate the impact of enhancement filters in detecting small simulated internal root resorptions (IRR). METHODS: Forty-two extracted human teeth were sectioned, connected, and stored in a dry human jaw and X-rayed with photostimulable phosphor plates (PSPs), composing the control group (CG). In the middle-third of the root canals, IRR lesions were simulated using Da Silveira protocol. Later, the specimens were X-rayed to create the test group (TG). All images acquired were exported with seven enhancement filters plus the original image. Three examiners used a five-point Likert scale to evaluate the images regarding the presence/absence of IRR. Diagnostic efficacy was assessed from sensitivity and specificity results. Comparison among filters was performed by using receiver operating characteristic (ROC) curve analysis. RESULTS: Moderate values of Kappa interexaminer (0.403-0.620) and high values of Kappa intraexaminer (0.757-0.915) were observed. The best performance occurred in the CG (p < 0.05). Original images presented the greatest sensitivity and area under the ROC curve (0.595-0.750), while the Endo filter presented the greatest specificity (0.952). Inversion and Pseudo-3D images produced the greatest doubt in the diagnosis, significant for CG with the Pseudo-3D filter (p < 0.05). CONCLUSIONS: The Original and 'Endo' filters should be chosen as it offers greater diagnostic ability and allows more confidence during the evaluation.
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Affiliation(s)
| | - Nádia Assein Arús
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Eduarda Adams Hilgert
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Postgraduate Program, Dental School, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Heloisa Emilia Dias da Silveira
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Heraldo Luís Dias da Silveira
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Mariana Boessio Vizzotto
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Doğramacı EJ, Sherriff M, Rossi-Fedele G, McDonald F. Location and severity of root resorption related to impacted maxillary canines: a cone beam computed tomography (CBCT) evaluation. AUSTRALASIAN ORTHODONTIC JOURNAL 2021. [DOI: 10.21307/aoj-2020-140] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Background
The present investigation was designed to determine the location and severity of root resorption associated with impacted maxillary canine teeth using cone beam computed tomography (CBCT). A secondary aim was to identify possible influencing factors.
Methods
The radiological reports of 183 patients, radiographed with a small-volume CBCT focussed on the impacted maxillary canine teeth, were assessed. Eighty-five patients had resorption associated with the impaction. The CBCT image datasets were viewed to determine the location and severity of the lesions.
Results
A total of 110 impacted maxillary canine teeth resorbed 120 adjacent teeth, including 14 premolars and one permanent molar. The apical third and palatal surface were commonly involved. Fifty per cent of the resorptive lesions were mild, 20% moderate and 30% severe. There was no significant relation between age or gender on the number, location or severity of resorption. There was a statistically significant correlation between the number of impacted canine teeth and the number of teeth resorbed, as well as the tooth type and the surface involved in the resorption.
Conclusions
All root levels and surfaces of teeth associated with impacted maxillary canine teeth can be resorbed to different levels of severity. Neither age nor gender influences the number, location or severity of the resorption.
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Affiliation(s)
- Esma J. Doğramacı
- * School of Dentistry , The University of Adelaide , Adelaide , Australia
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5
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Effects of Exposure Parameters and Voxel Size for Cone-Beam Computed Tomography on the Image Matching Accuracy with an Optical Dental Scan Image: An In Vitro Study. BIOMED RESEARCH INTERNATIONAL 2021; 2021:6971828. [PMID: 34222482 PMCID: PMC8213486 DOI: 10.1155/2021/6971828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/02/2021] [Indexed: 11/17/2022]
Abstract
This study is aimed at assessing the effects of exposure parameters and voxel size for cone-beam computed tomography (CBCT) on the image matching accuracy with an optical dental scan image. CBCT and optical scan images of a dry human mandible were obtained. Different CBCT settings were used: tube voltage, 60, 80, and 100 kVp; tube current, 6 and 8 mA; and voxel size, 100, 200, and 300 μm. Image matching between the CBCT and optical scan images was performed using implant planning software by dental professionals (n = 18). The image matching accuracy in each combination of CBCT settings was evaluated by assessing the linear discrepancy between the three-dimensionally reconstructed radiological image and the registered optical scan image using an image analysis software program. The Kruskal-Wallis test and a post hoc Mann–Whitney U test with Bonferroni correction were used to compare the accuracy of image registration between the groups (α = 0.05). Overall, the image matching accuracy was not significantly different between tube voltage and current settings; however, significantly higher image registration errors were found at the combination of 100 kVp tube voltage/8 mA tube current (F = 8.44, P < 0.001). Changes in voxel sizes did not significantly interfere with the image registration results. No interaction was found among voltage, current, and voxel size in terms of image registration accuracy (F = 2.022, P = 0.091). Different exposure parameter settings in tube voltage and tube current did not significantly influence the image matching accuracy between CBCT and optical dental scan images; however, a high radiation dose could be inappropriate. The image matching accuracy was not significantly affected by changing the voxel sizes of CBCT.
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6
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Arnold M. Reparative Endodontic Treatment of a Perforating Internal Inflammatory Root Resorption: A Case Report. J Endod 2020; 47:146-155. [PMID: 33065177 DOI: 10.1016/j.joen.2020.09.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 09/30/2020] [Indexed: 10/23/2022]
Abstract
The aim of this case report was to present a reparative treatment approach of an extensive internal inflammatory resorption with a lateral perforation and apical and lateral inflammatory lesions. Only the necrotic coronal part of the pulp was removed, and the vital pulp tissue within the resorption cavity and the apical part of the root canal was left uninstrumented. Bleeding was induced, and the blood clot was covered with mineral trioxide aggregate. Hard tissue repair and healing of the apical lesion could be observed in the 3-year recall.
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Affiliation(s)
- Michael Arnold
- Praxis für Endodontie und Zahnerhaltung, Dresden, Germany.
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7
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Gaêta‐Araujo H, Nascimento EHL, Oliveira‐Santos N, Pinheiro MCR, Coelho‐Silva F, Oliveira‐Santos C. Influence of adjacent teeth restored with metal posts in the detection of simulated internal root resorption using CBCT. Int Endod J 2020; 53:1299-1306. [DOI: 10.1111/iej.13348] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/09/2020] [Indexed: 02/01/2023]
Affiliation(s)
- H. Gaêta‐Araujo
- Division of Oral Radiology Department of Oral Diagnosis Piracicaba Dental School University of Campinas (UNICAMP) PiracicabaBrazil
| | - E. H. L. Nascimento
- Division of Oral Radiology Department of Oral Diagnosis Piracicaba Dental School University of Campinas (UNICAMP) PiracicabaBrazil
| | - N. Oliveira‐Santos
- Division of Oral Radiology Department of Oral Diagnosis Piracicaba Dental School University of Campinas (UNICAMP) PiracicabaBrazil
| | - M. C. R. Pinheiro
- Division of Oral Radiology Department of Oral Diagnosis Piracicaba Dental School University of Campinas (UNICAMP) PiracicabaBrazil
| | - F. Coelho‐Silva
- Division of Oral Radiology Department of Oral Diagnosis Piracicaba Dental School University of Campinas (UNICAMP) PiracicabaBrazil
| | - C. Oliveira‐Santos
- Division of Oral Radiology Department of Stomatology, Public Oral Health, Forensic Dentistry School of Dentistry of Ribeirao Preto University of Sao Paulo (USP) Ribeirao Preto Brazil
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8
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Diagnostic efficacy of different cone beam computed tomography scanning protocols in the detection of chemically simulated external root resorption. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:322-327. [PMID: 32423729 DOI: 10.1016/j.oooo.2020.03.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 03/10/2020] [Accepted: 03/22/2020] [Indexed: 11/21/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the efficacy of different high-resolution cone beam computed tomography protocols in the diagnosis of chemically simulated external root resorption (ERR). STUDY DESIGN ERR was simulated in 3 sizes by using an acid decalcification protocol in the cervical, middle, and apical thirds of 30 single-rooted premolars. Four scans of each tooth were acquired with different voxel sizes: 0.080, 0.085, 0.120, and 0.133 mm. The images were analyzed by 2 blinded evaluators for the presence of ERR. The evaluation of diagnostic performance was based on receiver operating characteristic (ROC) curve analysis. RESULTS No statistically significant differences were found in the detection of ERR with regard to lesion sizes or the different root thirds. Areas under the ROC curve were 0.901, 0.892, 0.887, and 0.767 for voxel sizes of 0.080, 0.085, 0.120, and 0.133 mm, respectively. Voxel sizes of 0.080 and 0.085 mm presented significantly larger areas under the ROC curve compared with the voxel size of 0.133 mm. There were no statistically significant differences among the protocols with the use of voxel sizes of 0.080, 0.085, and 0.120 mm. CONCLUSIONS Cone beam computed tomography examinations with higher-resolution protocols demonstrated better performance in the diagnosis of ERR. Further investigations using simulations that more closely resemble the actual ERR process are warranted.
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9
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Chen X, Yu X, Yan K, Liu S, Sun Z, Li S. Multiple idiopathic cervical root resorption involving all permanent teeth. AUST ENDOD J 2020; 46:263-271. [PMID: 32196855 DOI: 10.1111/aej.12398] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2020] [Indexed: 12/26/2022]
Abstract
Multiple idiopathic external cervical root resorption is a rare condition with numerous predisposing factors that have not yet been clearly elucidated. In addition, its diagnosis and treatment pose challenges for clinicians, and thus, the extraction of the involved teeth is commonly performed. Here, we report a 29-year-old pregnant woman with no contributory medical or family/social history who experienced cervical root resorption that progressed aggressively and involved all permanent teeth. This case is unique owing to the involvement of all teeth. Reports of multiple idiopathic external cervical root resorption are rare in the literature, and the pathogenesis of the condition is poorly understood. This report aims to add an additional case to the existing literature, analyse the underlying mechanisms and provide clinicians with some guidance in diagnosing cervical root resorption.
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Affiliation(s)
- Xue Chen
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xijiao Yu
- Department of Endodontics, Jinan Stomatological Hospital, Jinan, China
| | - Kaixian Yan
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Shuang Liu
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Zhaoze Sun
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Shu Li
- Department of Periodontology, School and Hospital of Stomatology, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
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10
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Pour DG, Sedaghati A, Shamshiri AR. Effect of Resolution and Bit Depth on Inferior Alveolar Canal Visualization on Exported Mandibular Cone-Beam Computed Tomography Images. J Oral Maxillofac Surg 2020; 78:731-737. [PMID: 32006490 DOI: 10.1016/j.joms.2019.12.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 12/06/2019] [Accepted: 12/18/2019] [Indexed: 11/25/2022]
Abstract
PURPOSE Cone-beam computed tomography (CBCT) is commonly requested before dental implant treatment for the anatomic assessment of the inferior alveolar canal (IAC) to prevent its neurovascular content from being traumatized. CBCT images can be saved in different types of resolutions and bit depths; these parameters may significantly affect the diagnostic accuracy of images. This study aimed to assess the effect of resolution and bit depth on IAC visualization on exported mandibular CBCT images. MATERIALS AND METHODS Forty-one mandibular CBCT images of differing image resolutions and voxel sizes (0.16, 0.32, and 0.48 mm) and differing bit depths (12 and 15) were exported from a software program as a single file. Two observers evaluated the cross-sectional images in terms of IAC visibility using a 3-point scale (good, moderate, and poor). Disagreements were resolved by including a third observer, and the highest agreement was recorded. RESULTS Study interobserver agreement was acceptable (84.2%) for IAC observation. The percentage of IAC observation was from 84.1 to 100% with the 12- and 15-bit depths, with a constant image resolution of 0.16 and 0.32 mm, respectively. A significant difference (from 19.5 to 48.8%) was noted between the 2 bit depths in the percentage of good IAC visualization with a constant resolution of 0.48 mm. Reduction in the image resolution to 0.48 mm showed a significant difference (19.5 to 100%) between the 12- and 15-bit depths in good IAC visualization. CONCLUSIONS Exporting the mandibular CBCT images with 0.32 mm of resolution and a 12-bit depth will produce good and moderate radiographic IAC observation with the benefit of a smaller file size.
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Affiliation(s)
- Daryoush Goodarzi Pour
- Associate Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Azin Sedaghati
- Postgraduate Student, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
| | - Ahmad Reza Shamshiri
- Assistant Professor, Community Oral Health Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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11
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Accuracy of alveolar bone height and thickness measurements in cone beam computed tomography: a systematic review and meta-analysis. Oral Surg Oral Med Oral Pathol Oral Radiol 2019; 128:667-679. [DOI: 10.1016/j.oooo.2019.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 05/02/2019] [Accepted: 05/14/2019] [Indexed: 02/08/2023]
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12
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Dabbaghi A, Sharifi S, Esmaeili M. Accuracy of High- and Low-Resolution Cone-Beam Computed Tomographic Scans in the Detection of Impacted Tooth-Induced External Root Resorption: An Ex-Vivo Study. Front Dent 2019; 16:429-435. [PMID: 33089244 PMCID: PMC7569271 DOI: 10.18502/fid.v16i6.3442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 10/10/2019] [Indexed: 11/24/2022] Open
Abstract
Objectives: Cone-beam computed tomography (CBCT) is used in diagnostic situations, as well as tooth impaction and its complications. A possible sequela of tooth impaction is resorption of adjacent teeth, complicating the treatment plans. This study aimed to determine the diagnostic accuracy of high- and low-resolution CBCT scans in the detection of external root resorptions (ERRs), caused by an adjacent impacted tooth in the cementoenamel junction (CEJ), mid-root, and apical areas. Materials and Methods: Forty-five intact single-rooted teeth were divided into three groups of 15. Each group was dedicated to each zone of the root. Slight, moderate, and severe ERRs were formed, and CBCT scans were taken before and after the formation of ERRs. The diagnostic accuracy was assessed, and the Proportion test was used to compare the results. Results: The statistical analyses of high- and low-resolution images showed a significant difference (P<0.05), which implies the higher accuracy of high-resolution images. The highest diagnostic accuracy among different zones was related to the mid-root, and the lowest was related to the apical zone. In terms of the size of ERRs, the diagnostic accuracy was the lowest for slight ERRs. Conclusion: The most reliable and accurate diagnostic mode was found in high-resolution images, in the mid-root zone, and with severe ERRs. The lowest diagnostic accuracy was found in low-resolution images, in the apical zone, and with slight ERRs.
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Affiliation(s)
- Arash Dabbaghi
- Department of Oral and Maxillofacial Radiology, School of Dental Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Sanaz Sharifi
- Department of Oral and Maxillofacial Radiology, School of Dental Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Masoud Esmaeili
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Goller Bulut D, Uğur Aydın Z. The impact of different voxels and exposure parameters of CBCT for the assessment of external root resorptions: A phantom study. AUST ENDOD J 2019; 45:146-153. [PMID: 31267607 DOI: 10.1111/aej.12354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2019] [Indexed: 02/01/2023]
Abstract
This study aimed to compare the effectiveness of the different voxel sizes and imaging parameters of cone beam computed tomography (CBCT) on the determination of external root resorption (ERR). ERRs were created in coronal, middle and apical regions. Depths (0.62-0.73 mm) and diameters (0.68-0.81 mm) of ERRs were measured using a digital calliper. Images were obtained in 0.125, 0.2, 0.25, 0.3 and 0.4 mm3 voxel sizes and at different currents. Data were analysed using Friedman and Wilcoxon signed-rank tests at a level of P < 0.05. There was a difference between the parameters in determining the size of the ERR in coronal and middle regions (P < 0.05), but there was no difference in the apical region (P > 0.05). The change in current and exposure time did not make a difference in determining the dimensions of the ERRs (P > 0.05). Some voxel dimensions were more reliable in determining the depth and diameter of ERR in the coronal and middle region.
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Affiliation(s)
- Duygu Goller Bulut
- Faculty of Dentistry, Department of Oral and Maxillofacial Radiology, Abant İzzet Baysal University, Bolu, Turkey
| | - Zeliha Uğur Aydın
- Faculty of Dentistry, Department of Endodontics, Abant İzzet Baysal University, Bolu, Turkey
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14
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Deliga Schröder AG, Westphalen FH, Schröder JC, Fernandes Â, Ditzel Westphalen VP. Accuracy of Different Imaging CBCT Systems for the Detection of Natural External Radicular Resorption Cavities: An Ex Vivo Study. J Endod 2019; 45:761-767. [PMID: 31003736 DOI: 10.1016/j.joen.2019.02.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 02/06/2019] [Accepted: 02/10/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of this study was to compare the sensitivity and specificity of 3 different systems of cone-beam computed tomography (CBCT) in the detection of natural external root resorption (ERR) cavities using microtomography as the gold standard. METHOD A sample of 126 ex vivo teeth were submitted to a microtomography examination to verify the presence/absence of ERR cavities. Then, they were divided into the control group: 85 teeth that did not present with an ERR cavity; and experimental group: 41 teeth that presented with 1 or more ERR cavities. The size of the natural ERR cavities varied from 2.46 mm3 to 3.11 mm3, which corresponded to cavities of 1.67 mm and 1.81 mm in diameter, respectively. The teeth were placed on a dry human mandible for scanning in each of the 3 protocols with different voxel sizes: 0.25 mm, 0.20 mm, and 0.166 mm. RESULTS The accuracy of the 3 protocols evaluated in this study are listed in decreasing order: 60.3% for a voxel size of 0.20 mm, 56.7% for a voxel size of 0.166 mm, and 46.7% for a voxel size of 0.25 mm; these are smaller values than previous studies have obtained using artificial ERR cavities. Statistically significant results were not found among the 3 CBCT protocols that were used (P > .05), and the receiver operating characteristic curve shows the small differences found between the protocols. CONCLUSION The results indicate that CBCT presents, for natural ERR, lower sensitivity and specificity values than those detected in previous studies of artificial cavities. The results demonstrate that natural ERR is neither easily observed nor accurately located by CBCT, as previous studies using artificial ERR indicated.
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Affiliation(s)
| | | | - Júlio César Schröder
- School of Life Sciences - Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Ângela Fernandes
- Department of Stomatology (Oral Radiology) - Universidade Federal do Paraná, Curitiba, Brazil
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15
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Likitmongkolsakul U, Aksornmuang J, Smithmaitrie P, Samruajbenjakun B. Three-Dimensional Simulation of Root Position Through a Combined Technique Using Cone-Beam Computed Tomography and a Digital Model. JOURNAL OF INDIAN ORTHODONTIC SOCIETY 2019. [DOI: 10.1177/0301574219840891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objective: The aim of this study was to develop a method to simulate root position in the patient and to evaluate the accuracy of all procedures.Materials and Methods: In Part I, the accuracy of a tooth model generated using cone-beam computed tomography (CBCT) was evaluated. Mesiodistal width was measured and compared between digital models and actual teeth. In Part II, the accuracy of simulated root positions generated in the scanned model was evaluated. Simulated root models were superimposed on the scanned dental model using the best fit method. The distances between the reference wire and the tooth were compared. In Part III, the simulated method was used with real orthodontic patients. The distances between the mini-implant and the tooth were compared.Results: Part I: The range of the differences was −0.106 to 0.152 mm. Part II: The range of the differences between the distance of the constructed tooth model and the simulated model was −0.065 to 0.256 mm. Part III: The range of the differences between the distance of the constructed tooth model and the simulated model was −0.089 to 0.135 mm. This technique provided high accuracy, with an average error of only 0.054 mm.Conclusion: High accuracy of the constructed model was achieved. Simulation of root position in a patient can be accomplished by combining data from CBCT and the digital model. This technique might be used effectively in orthodontic treatment.
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Affiliation(s)
- Udomsak Likitmongkolsakul
- Departments of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Juthatip Aksornmuang
- Departments of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Pruittikorn Smithmaitrie
- Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Bancha Samruajbenjakun
- Departments of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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Fokas G, Vaughn VM, Scarfe WC, Bornstein MM. Accuracy of linear measurements on CBCT images related to presurgical implant treatment planning: A systematic review. Clin Oral Implants Res 2019; 29 Suppl 16:393-415. [PMID: 30328204 DOI: 10.1111/clr.13142] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of this systematic review was to identify, review, analyze, and summarize available evidence on the accuracy of linear measurements when using maxillofacial cone beam computed tomography (CBCT) specifically in the field of implant dentistry. MATERIAL AND METHODS The search was undertaken in April 2017 in the National Library of Medicine database (Medline) through its online site (PubMed), followed by searches in the Cochrane, EMBASE, ScienceDirect, and ProQuest Dissertation and Thesis databases. The main inclusion criterion for studies was that linear CBCT measurements were performed for quantitative assessment (e.g., height, width) of the alveolar bone at edentulous sites or measuring distances from anatomical structures related to implant dentistry. The studies should compare these values to clinical data (humans) or ex vivo and/or experimental (animal) findings from a "gold standard." RESULTS The initial search yielded 2,516 titles. In total, 22 studies were included in the final analysis. Of those, two were clinical and 20 ex vivo investigations. The major findings of the review indicate that CBCT provides cross-sectional images that demonstrate high accuracy and reliability for bony linear measurements on cross-sectional images related to implant treatment. A wide range of error has been reported when performing linear measurements on CBCT images, with both over- and underestimation of dimensions in comparison with a gold standard. A voxel size of 0.3 to 0.4 mm is adequate to provide CBCT images of acceptable diagnostic quality for implant treatment planning. CONCLUSIONS CBCT can be considered as an appropriate diagnostic tool for 3D preoperative planning. Nevertheless, a 2 mm safety margin to adjacent anatomic structures should be considered when using CBCT. In clinical practice, the measurement accuracy and reliability of linear measurements on CBCT images are most likely reduced through factors such as patient motion, metallic artefacts, device-specific exposure parameters, the software used, and manual vs. automated procedures.
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Affiliation(s)
- George Fokas
- Oral Rehabilitation, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Vida M Vaughn
- Vida M. Vaughn, Kornhauser Health Science Library, University of Louisville, Louisville, Kentucky
| | - William C Scarfe
- Radiology and Imaging Science, Department of Surgical/Hospital Dentistry, University of Louisville School of Dentistry, Louisville, Kentucky
| | - Michael M Bornstein
- Oral and Maxillofacial Radiology, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
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Guo XL, Li G, Zheng JQ, Ma RH, Liu FC, Yuan FS, Lyu PJ, Guo YJ, Yin S. Accuracy of detecting vertical root fractures in non‐root filled teeth using cone beam computed tomography: effect of voxel size and fracture width. Int Endod J 2019; 52:887-898. [PMID: 30661246 DOI: 10.1111/iej.13076] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 01/15/2019] [Indexed: 01/16/2023]
Affiliation(s)
- X. L. Guo
- Department of Oral and Maxillofacial Radiology Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology Beijing China
| | - G. Li
- Department of Oral and Maxillofacial Radiology Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology Beijing China
| | - J. Q. Zheng
- Center of Digital Dentistry & Department of Prosthodontics Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology Beijing China
| | - R. H. Ma
- Department of Oral and Maxillofacial Radiology Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology Beijing China
| | - F. C. Liu
- Department of Epidemiology and Biostatistics School of Public Health Peking University Beijing China
| | - F. S. Yuan
- Center of Digital Dentistry & Department of Prosthodontics Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology Beijing China
| | - P. J. Lyu
- Center of Digital Dentistry & Department of Prosthodontics Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology Beijing China
| | - Y. J. Guo
- Department of Stomatology Beijing Children's Hospital Capital Medical University Beijing China
| | - S. Yin
- Department of Oral and Maxillofacial Radiology Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology Beijing China
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Comparison of linear and volumetric measurements obtained from periodontal defects by using cone beam-CT and micro-CT: an in vitro study. Clin Oral Investig 2018; 23:2235-2244. [DOI: 10.1007/s00784-018-2665-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 09/25/2018] [Indexed: 01/25/2023]
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Shokri A, Jamalpour MR, Eskandarloo A, Godiny M, Amini P, Khavid A. Performance of Cone Beam Computed Tomography Systems in Visualizing the Cortical Plate in 3D Image Reconstruction: An In Vitro Study. Open Dent J 2018; 12:586-595. [PMID: 30288182 PMCID: PMC6142658 DOI: 10.2174/1874210601812010586] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 06/29/2018] [Accepted: 08/10/2018] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Cortical bone is an important anatomical structure and its thickness needs to be determined prior to many dental procedures to ensure treatment success. Imaging modalities are necessarily used in dentistry for treatment planning and dental procedures. Three-dimensional image reconstruction not only provides visual information but also enables accurate measurement of anatomical structures; thus, it is necessarily required for maxillofacial examination and in case of skeletal problems in this region. AIMS This study aimed to assess the ability of three Cone Beam Computed Tomography (CBCT) systems including Cranex 3D, NewTom 3G and 3D Promax for Three-Dimensional (3D) image reconstruction of the cortical plate with variable thicknesses. METHODS Depending on the cortical bone thickness, samples were evaluated in three groups of ≤ 0. 5 mm, 0.6 -1 mm and 1.1-1.5 mm cortical bone thickness. The CBCT scans were obtained from each sample using three systems, their respective FOVs, and 3D scans were reconstructed using their software programs. Two observers viewed the images twice with a two-week interval. The ability of each system in the 3D reconstruction of different thicknesses of cortical bone was determined based on its visualization on the scans. The data were analyzed using SPSS and Kappa test. RESULTS The three systems showed the greatest difference in the 3D reconstruction of cortical bone with < 0.5 mm thickness. Cranex 3D with 4×6 cm2 FOV had the highest and 3D Promax with 8×8 cm2 FOV had the lowest efficacy for 3D reconstruction of cortical bone. Cranex 3D with 4×6 cm2 and 6×8 cm2 FOVs and NewTom 3G with 5×5 cm2 and 8×5 cm2 FOVs showed significantly higher efficacy for 3D reconstruction of cortical bone with 0.6-1mm thickness while 3D Promax followed by NewTom 3G with 8×8 cm2 FOV had the lowest efficacy for this purpose. CONCLUSION Most CBCT systems have high efficacy for 3D image reconstruction of cortical bone with thicknesses over 1 mm while they have poor efficacy for image reconstruction of cortical bone with less than 0.5 mm thickness. Thus, for accurate visualization of anatomical structures on CBCT scans, systems with smaller FOVs and consequently smaller voxel size are preferred.
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Affiliation(s)
- Abbas Shokri
- Department of Oral and Maxillofacial Radiology, Dental Research Center, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mohammad Reza Jamalpour
- Department of Oral and Maxillofacial Radiology, Dental Research Center, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Amir Eskandarloo
- Department of Oral and Maxillofacial Radiology, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mostafa Godiny
- Department of Endodontics, Dental school , Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Payam Amini
- Department of Epidemiology and Reproductive Health, Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Atefeh Khavid
- Department of Oral and Maxillofacial Radiology, Dental School, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Sönmez G, Koç C, Kamburoğlu K. Accuracy of linear and volumetric measurements of artificial ERR cavities by using CBCT images obtained at 4 different voxel sizes and measured by using 4 different software: an ex vivo research. Dentomaxillofac Radiol 2018; 47:20170325. [PMID: 29851352 DOI: 10.1259/dmfr.20170325] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To compare the accuracy of linear and volumetric measurements of artificial external root resorption (ERR) cavities by cone beam CT (CBCT) images obtained at four voxel sizes and by using four different software ex vivo. METHODS ERR cavities were created on 40 extracted single rooted anterior teeth. Images were obtained by using Planmeca CBCT unit at endo mode (0.075 mm); high-resolution mode (0.1 mm); high-definition mode (0.15 mm) and normal resolution mode (0.2 mm) voxel sizes. Images were analyzed by two observers using four different software (Romexis, 3D Doctor, ITK-SNAP, and OsiriX). (1) Diameter; (2) height; (3) depth; and (4) volume of the ERR were measured. CBCT measurements were then compared with direct physical measurements. ANOVA was used with general linear model analysis. The significance level was set at p < 0.05. RESULTS One-way ANOVA general linear model analysis showed no significant difference between or within observers for diameter, height, depth and volume measurements (p > 0.05). We found significant differences for diameter and volume measurements among softwares in terms of mean differences as compared to mean standard direct measurements (p < 0.05). We found statistically significant differences among voxel sizes and software for height measurements (p < 0.05). In addition, we found significant differences for diameter and volume measurements (p < 0.05) suggesting more accurate measurements for the cervical region when compared to apical region. CONCLUSIONS Observers using CBCT images obtained at four voxel sizes performed similarly in the quantification of artificial ERR with clinically insignificant distinction between CBCT softwares used.
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Affiliation(s)
- Gül Sönmez
- 1 Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University , Ankara , Turkey
| | - Cemre Koç
- 2 Department of Endodontics, Faculty of Dentistry, Başkent University , Ankara , Turkey
| | - Kıvanç Kamburoğlu
- 1 Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University , Ankara , Turkey
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Pelekos G, Acharya A, Tonetti MS, Bornstein MM. Diagnostic performance of cone beam computed tomography in assessing peri-implant bone loss: A systematic review. Clin Oral Implants Res 2018; 29:443-464. [PMID: 29578266 DOI: 10.1111/clr.13143] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVES To evaluate the diagnostic performance of cone beam computed tomography (CBCT) in the assessment of peri-implant bone loss and analyze its influencing factors. MATERIALS AND METHODS Clinical and preclinical studies reporting diagnostic outcomes of CBCT imaging of peri-implant bone loss compared to direct reference measurements were sought by searching five electronic databases, PubMed, MEDLINE, EMBASE, Web of Science, and CINAHL Plus, and OpenGrey. QUADAS-2 criteria were adapted for quality analysis of the included studies. A qualitative synthesis was performed. Two meta-analysis models (random-effects and mixed-effects) summarized the area under receiver operating characteristic (AUC) curve observations reported in the selected studies. The mixed-effects meta-analysis model evaluated three possible influencing factors, "defect type," "defect size," and "study effect." RESULTS The initial search yielded 3,716 titles, from which 18 studies (13 in vitro and 5 animal) were included. Diagnostic accuracy of CBCT was fair to excellent in detecting in vitro circumferential-intrabony and fenestration defects, but moderate to low for peri-implant dehiscences, and tended to be higher for larger defect sizes. Both, over- and underestimation of linear measurements were reported for the animal models. The meta-analyses included 37 AUC observations from eight studies. The random-effects model showed significant heterogeneity. The mixed-effects model exhibited also significant but lower heterogeneity, and "defect type" and "study effect" significantly influenced the variability of AUC observations. CONCLUSION In vitro, CBCT performs well in detecting peri-implant circumferential-intrabony or fenestration defects but less in depicting dehiscences. Influencing factors due to other site-related and technical parameters on the diagnostic outcome need to be addressed further in the future studies.
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Affiliation(s)
- Georgios Pelekos
- Periodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Aneesha Acharya
- Department of Periodontology, Dr. D. Y. Patil Dental College and Hospital, Dr. D. Y. Patil Vidyapeeth, Pune, India
- Implant Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Maurizio S Tonetti
- Periodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Michael M Bornstein
- Oral and Maxillofacial Radiology, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
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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] [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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Impact of cone-beam computed tomography scan mode on the diagnostic yield of chemically simulated external root resorption. Am J Orthod Dentofacial Orthop 2017; 151:1073-1082. [PMID: 28554453 DOI: 10.1016/j.ajodo.2016.10.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 10/01/2016] [Accepted: 10/01/2016] [Indexed: 11/21/2022]
Abstract
INTRODUCTION The aim of this in-vitro study was to evaluate the influence of cone-beam computed tomography scans on the diagnosis of chemically simulated external root resorption. METHODS One hundred extracted anterior teeth were selected. Subsurface demineralization was induced on a limited area of the apical third of the root of 49 teeth. Each tooth was placed in an empty socket of a partially edentulous dry mandible. Cone-beam computed tomography images were obtained according to 3 protocols: (1) half scan, 0.40-mm voxel size; (2) full scan, 0.40-mm voxel size; and (3) full scan, 0.125-mm voxel size. Three observers evaluated the images. Sensitivity, specificity, accuracy, and area under the curve were compared with the Cochran Q and Mann-Whitney U tests. RESULTS Protocol 3 had the highest sensitivity (81.63%), accuracy (80.67%), and area under the curve (0.807). There were statistically significant differences between protocol 3 and the other 2 protocols (P <0.001). The specificity of protocol 1 (84.97%) was greater than that of protocols 2 (69.93%) and 3 (79.74%); however, a statistically significant difference was found only between protocols 1 and 2 (P = 0.005). CONCLUSIONS A more dedicated, high-resolution scan should be acquired when one intends to investigate the early stage of external root resorption during orthodontic treatment. However, this does not imply that all orthodontic patients should be subjected to high-dose cone-beam computed tomography scans.
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Influence of acquisition parameters on the evaluation of mandibular third molars through cone beam computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol 2017; 124:183-190. [PMID: 28483471 DOI: 10.1016/j.oooo.2017.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/02/2017] [Accepted: 03/04/2017] [Indexed: 11/21/2022]
Abstract
OBJECTIVES The aim of the study was to assess the influence of cone beam computed tomography (CBCT) acquisition parameters on the evaluation of mandibular third molars and their relationship to the mandibular canal. STUDY DESIGN Eight dry human mandibles with 13 mandibular third molars were scanned with one CBCT unit. Voxel size (0.2 and 0.3 mm), field of view (FOV) size (12 × 8.5 cm and 5 × 5 cm), and number of basis images (450 and 720) were the variables studied. Two examiners evaluated the images, and the resulting data were compared through McNemar, McNemar-Bowker, and Student t tests. Additionally, dosimetry was determined for all protocols tested, and radiation doses were compared through analysis of variance. RESULTS The variables did not influence evaluation of mandibular third molars, except for voxel size, when assessing contact between the tooth and the mandibular canal (P = .021). Although FOV and number of basis images affected radiation dose, voxel size did not. CONCLUSIONS FOV size and number of basis images did not influence the evaluation of mandibular third molars and their relationship to the mandibular canal in the CBCT unit used. Conversely, smaller voxel size affected the assessment of contact between the tooth and the mandibular canal. In units in which voxel size does not influence radiation dose, the most appropriate CBCT protocol is the one using a smaller voxel size and delivering the lowest radiation dose to the patient.
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Shokri A, Miresmaeili A, Farhadian N, Falah-Kooshki S, Amini P, Mollaie N. Effect of Head Position on Maxillofacial Transverse Measurements Made on the Skull and Cone Beam Computed Tomography Scans. Braz Dent J 2016; 27:604-608. [PMID: 27982242 DOI: 10.1590/0103-6440201601166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 08/08/2016] [Indexed: 11/22/2022] Open
Abstract
Article Incorrect patient positioning and the resultant image distortion occur in many radiographic examinations. This study aimed to assess the effect of tilting, rotation and tipping of the head on the accuracy of maxillofacial transverse measurements made on cone beam computed tomography (CBCT) scans. The CBCT scans were obtained in central position of 10 dry human skulls. Using three-dimensional (3D) Dolphin software, six positions namely 10° and 20° tilts, rotations and tips were reconstructed of central position. Transverse distances between landmarks were measured on 3D scans and the skulls. The intraclass correlation coefficient (ICC) and the Bland-Altman plot were used to compare the mean values measured by the two observers. For most landmarks, no significant differences were noted between the mean transverse distances measured in the six positions and those measured in central position on 3D scans (p>0.005). In conclusion, all measurements of transverse distances made on 3D scans in different positions were underestimated compared to the actual values measured on the skull.
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Affiliation(s)
- Abbas Shokri
- Dental Research Center, Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Amirfarhang Miresmaeili
- Dental Research Center, Department of Orthodontics, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Nasrin Farhadian
- Dental Research Center, Department of Orthodontics, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sepideh Falah-Kooshki
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Payam Amini
- Department of Epidemiology and Reproductive Health, Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Najmeh Mollaie
- Department of Orthodontics, Faculty of Dentistry, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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Nikneshan S, Valizadeh S, Javanmard A, Alibakhshi L. Effect of Voxel Size on Detection of External Root Resorption Defects Using Cone Beam Computed Tomography. IRANIAN JOURNAL OF RADIOLOGY 2016; 13:e34985. [PMID: 27853499 PMCID: PMC5107261 DOI: 10.5812/iranjradiol.34985] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/28/2016] [Accepted: 03/26/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND Selecting a voxel size that yields minimal radiation dose with no significant compromise of the diagnostic accuracy of cone beam computed tomography (CBCT) is particularly important. OBJECTIVES This study aimed to assess the effect of voxel size on detection accuracy of simulated external root resorption defects using NewTom CBCT system. MATERIALS AND METHODS In this diagnostic study, the roots of 90 extracted human central incisors were hypothetically divided into cervical, middle, and apical thirds. Variable-size defects were prepared in the buccal and lingual surfaces of the roots and CBCT scans were obtained with four different voxel sizes (150, 200, 250, and 300). Presence or absence of defects on CBCT scans was determined by three radiologists and the results were compared with the gold standard (actual size and depth of defects). Sensitivity and specificity values were calculated and reported for different groups. RESULTS In the lingual surfaces, the highest specificity and sensitivity belonged to 300µm voxel size (92.9%), and 200 and 250µm voxel sizes (both 97.4%) in the cervical third, respectively. In the middle third, the highest specificity and sensitivity belonged to 250 and 200µm voxel sizes (84.6% and 100%, respectively). In the apical third, the highest specificity and sensitivity belonged to 300 µm voxel size (100% and 97.9%, respectively). In the buccal surfaces, the highest specificity and sensitivity belonged to 150 (75.0%), 300 and 250 µm voxel sizes (100%) and the minimum values belonged to 200 µm voxel size (60% and 97.3%) in the cervical third. In the apical third, the highest specificity and sensitivity were noted in 300 µm voxel size (100% and 97.6%, respectively) and the minimum values were seen in 200 and 150 µm voxel sizes (93.8%, 90.5%, respectively). In the middle third, 300, 250 and 200 µm voxel sizes yielded the highest specificity (88.9%), while 150 µm voxel size yielded the highest sensitivity (98.8%). CONCLUSION Considering the similar diagnostic efficacy of all voxel sizes, 300 µm voxel size can be used with adequate efficacy for detection of external root resorption defects with minimal patient radiation dose and the shortest scanning time.
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Affiliation(s)
- Sima Nikneshan
- Department of Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Solmaz Valizadeh
- Department of Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Leila Alibakhshi
- Department of Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Corresponding author: Leila Alibakhshi, Department of Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Tel: +98-2122907040, Fax: +98-2188804037, E-mail:
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Ganguly R, Ramesh A, Pagni S. The accuracy of linear measurements of maxillary and mandibular edentulous sites in cone-beam computed tomography images with different fields of view and voxel sizes under simulated clinical conditions. Imaging Sci Dent 2016; 46:93-101. [PMID: 27358816 PMCID: PMC4925656 DOI: 10.5624/isd.2016.46.2.93] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 02/11/2016] [Accepted: 02/19/2016] [Indexed: 12/12/2022] Open
Abstract
PURPOSE The objective of this study was to investigate the effect of varying resolutions of cone-beam computed tomography images on the accuracy of linear measurements of edentulous areas in human cadaver heads. Intact cadaver heads were used to simulate a clinical situation. MATERIALS AND METHODS Fiduciary markers were placed in the edentulous areas of 4 intact embalmed cadaver heads. The heads were scanned with two different CBCT units using a large field of view (13 cm×16 cm) and small field of view (5 cm×8 cm) at varying voxel sizes (0.3 mm, 0.2 mm, and 0.16 mm). The ground truth was established with digital caliper measurements. The imaging measurements were then compared with caliper measurements to determine accuracy. RESULTS The Wilcoxon signed rank test revealed no statistically significant difference between the medians of the physical measurements obtained with calipers and the medians of the CBCT measurements. A comparison of accuracy among the different imaging protocols revealed no significant differences as determined by the Friedman test. The intraclass correlation coefficient was 0.961, indicating excellent reproducibility. Inter-observer variability was determined graphically with a Bland-Altman plot and by calculating the intraclass correlation coefficient. The Bland-Altman plot indicated very good reproducibility for smaller measurements but larger discrepancies with larger measurements. CONCLUSION The CBCT-based linear measurements in the edentulous sites using different voxel sizes and FOVs are accurate compared with the direct caliper measurements of these sites. Higher resolution CBCT images with smaller voxel size did not result in greater accuracy of the linear measurements.
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Affiliation(s)
- Rumpa Ganguly
- Department of Diagnostic Sciences, Division of Oral and Maxillofacial Radiology, Tufts University School of Dental Medicine Boston, MA, USA
| | - Aruna Ramesh
- Department of Diagnostic Sciences, Division of Oral and Maxillofacial Radiology, Tufts University School of Dental Medicine Boston, MA, USA
| | - Sarah Pagni
- Department of Public Health and Community Service, Tufts University School of Dental Medicine, Boston, MA, USA
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Safi Y, Hosseinpour S, Aziz A, Bamedi M, Malekashtari M, Vasegh Z. Effect of Amperage and Field of View on Detection of Vertical Root Fracture in Teeth with Intracanal Posts. IRANIAN ENDODONTIC JOURNAL 2016; 11:202-7. [PMID: 27471532 PMCID: PMC4947845 DOI: 10.7508/iej.2016.03.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 05/04/2016] [Accepted: 05/15/2016] [Indexed: 11/30/2022]
Abstract
INTRODUCTION This study sought to assess the effects of amperage (mA) and field of view (FOV) on intracanal metal post artifacts and the diagnostic parameters for detection of vertical root fracture (VRF) in teeth with intracanal posts. METHODS AND MATERIALS In this diagnostic study, 80 human single-canal teeth were evaluated by cone-beam computed tomography (CBCT). Nickel chrome cast posts were placed into root canals after root canal therapy and canal preparation. In the test group, fracture was induced by an instron machine while no fracture was induced in the control group. Deterministic and probabilistic sensitivity and specificity values at different exposure settings were statistically analyzed using the one-way ANOVA and pairwise comparisons were performed by Tukey's test. RESULTS Significant differences were found between the two groups in terms of deterministic (P<0.0001) and probabilistic (P<0.013) sensitivity and deterministic (P<0.037) and probabilistic (P<0.0001) specificity at different FOV and mA combinations. CONCLUSION A smaller FOV and lower mA should be preferably used for detection of VRFs in teeth with intracanal posts.
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Affiliation(s)
- Yaser Safi
- Oral and Maxillofacial Radiology Department, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sepanta Hosseinpour
- Students' Research Committee, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Aziz
- Oral and Dental Disease Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | | | | | - Zahra Vasegh
- Oral and Maxillofacial Radiology Department, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Kalatzis-Sousa NG, Spin-Neto R, Wenzel A, Tanomaru-Filho M, Faria G. Use of micro-computed tomography for the assessment of periapical lesions in small rodents: a systematic review. Int Endod J 2016; 50:352-366. [PMID: 26992821 DOI: 10.1111/iej.12633] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 03/15/2016] [Indexed: 01/26/2023]
Abstract
This systematic review aimed to evaluate the literature on the acquisition-, reconstruction- and analysis parameters of micro-computed tomography (micro-CT) for the assessment of periapical lesions in rats and mice, and to illustrate the effect of variation in these parameters. The PubMed database was searched from 2000 to January 2015 (English-language publications) for reports on the use of micro-CT to evaluate periapical lesions in rats and mice. QUADAS criteria were used to rate the quality of the studies. To illustrate the effect of variations in acquisition-, reconstruction-, and analysis parameters on images of periapical lesions, micro-CT examination of two hemi-mandibles of mice, with periapical lesions around the first molar was undertaken. Twenty-one studies were identified, which analysed periapical lesions in rats or mice using micro-CT. According to the QUADAS, no study was classified as high-, seven were classified as moderate-, and 14 as low quality. The effect of variation in parameters was that voxel size may interfere with image sharpness, reconstruction may interfere with image sharpness and contrast, and inadequate plane orientation may alter the size of the periapical lesion. Nonpersonalized ROIs resulted in areas that were not part of the periapical lesion. Changing the limits of the threshold for bone-tissue visualization increased lesion size. There is no defined protocol for acquiring and analysing micro-CT images of periapical lesions in rats and mice. Furthermore, acquisition-, reconstruction- and analysis parameters are not adequately explained, which may compromise the scientific impact of the studies.
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Affiliation(s)
- N G Kalatzis-Sousa
- Department of Restorative Dentistry, Araraquara School of Dentistry, UNESP Univ Estadual Paulista, Araraquara, SP, Brazil
| | - R Spin-Neto
- Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark
| | - A Wenzel
- Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark
| | - M Tanomaru-Filho
- Department of Restorative Dentistry, Araraquara School of Dentistry, UNESP Univ Estadual Paulista, Araraquara, SP, Brazil
| | - G Faria
- Department of Restorative Dentistry, Araraquara School of Dentistry, UNESP Univ Estadual Paulista, Araraquara, SP, 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] [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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Madani Z, Moudi E, Bijani A, Mahmoudi E. Diagnostic Accuracy of Cone-Beam Computed Tomography and Periapical Radiography in Internal Root Resorption. IRANIAN ENDODONTIC JOURNAL 2015; 11:51-6. [PMID: 26843878 PMCID: PMC4731534 DOI: 10.7508/iej.2016.01.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 11/10/2015] [Accepted: 11/21/2015] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The aim of this study was to compare the diagnostic value of cone-beam computed tomography (CBCT) and periapical (PA) radiography in detecting internal root resorption. METHODS AND MATERIALS Eighty single rooted human teeth with visible pulps in PA radiography were split mesiodistally along the coronal plane. Internal resorption like lesions were created in three areas (cervical, middle and apical) in labial wall of the canals in different diameters. PA radiography and CBCT images were taken from each tooth. Two observers examined the radiographs and CBCT images to evaluate the presence of resorption cavities. The data were statistically analyzed and degree of agreement was calculated using Cohen's kappa (k) values. RESULTS The mean±SD of agreement coefficient of kappa between the two observers of the CBCT images was calculated to be 0.681±0.047. The coefficients for the direct, mesial and distal PA radiography were 0.405±0.059, 0.421±0.060 and 0.432±0.056, respectively (P=0.001). The differences in the diagnostic accuracy of resorption of different sizes were statistically significant (P<0.05); however, the PA radiography and CBCT, had no statistically significant differences in detection of internal resorption lesions in the cervical, middle and apical regions. CONCLUSION Though, CBCT has a higher sensitivity, specificity, positive predictive value and negative predictive value in comparison with conventional radiography, this difference was not significant.
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Affiliation(s)
- Zahrasadat Madani
- Department of Endodontics, Dental School, Babol University of Medical Sciences, Babol, Iran
| | - Ehsan Moudi
- Department of Oral and Maxillofacial Radiology, Dental School, Babol University of Medical Sciences, Babol, Iran
| | - Ali Bijani
- Social Determinants of Health Research Center, Babol University of Medical Sciences Babol, Iran
| | - Elham Mahmoudi
- Department of Endodontics, Dental School, Babol University of Medical Sciences, Babol, Iran
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Abella F, Morales K, Garrido I, Pascual J, Duran-Sindreu F, Roig M. Endodontic applications of cone beam computed tomography: case series and literature review. GIORNALE ITALIANO DI ENDODONZIA 2015. [DOI: 10.1016/j.gien.2015.08.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kiljunen T, Kaasalainen T, Suomalainen A, Kortesniemi M. Dental cone beam CT: A review. Phys Med 2015; 31:844-860. [PMID: 26481816 DOI: 10.1016/j.ejmp.2015.09.004] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 09/15/2015] [Accepted: 09/19/2015] [Indexed: 11/17/2022] Open
Abstract
For the maxillofacial region, there are various indications that cannot be interpreted from 2D images and will benefit from multiplanar viewing. Dental cone beam CT (CBCT) utilises a cone- or pyramid-shaped X-ray beam using mostly flat-panel detectors for 3D image reconstruction with high spatial resolution. The vast increase in availability and amount of these CBCT devices offers many clinical benefits, and their ongoing development has potential to bring various new clinical applications for medical imaging. Additionally, there is also a need for high quality research and education. European guidelines promote the use of a medical physics expert for advice on radiation protection, patient dose optimisation, and equipment testing. In this review article, we perform a comparison of technical equipment based on manufacturer data, including scanner specific X-ray spectra, and describe issues concerning CBCT image reconstruction and image quality, and also address radiation dose issues, dosimetry, and optimisation. We also discuss clinical needs and what type of education users should have in order to operate CBCT systems safely. We will also take a look into the future and discuss the issues that still need to be solved.
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Affiliation(s)
- Timo Kiljunen
- Docrates Cancer Center, Saukonpaadenranta 2, 00180 Helsinki, Finland.
| | - Touko Kaasalainen
- HUS Medical Imaging Center, Radiology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 4, 00290 Helsinki, Finland
| | - Anni Suomalainen
- HUS Medical Imaging Center, Radiology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 4, 00290 Helsinki, Finland
| | - Mika Kortesniemi
- HUS Medical Imaging Center, Radiology, University of Helsinki and Helsinki University Hospital, Haartmaninkatu 4, 00290 Helsinki, Finland
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Gomes LR, Gomes MR, Gonçalves JR, Ruellas ACO, Wolford LM, Paniagua B, Benavides E, Cevidanes LHS. Cone beam computed tomography-based models versus multislice spiral computed tomography-based models for assessing condylar morphology. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 121:96-105. [PMID: 26679363 DOI: 10.1016/j.oooo.2015.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 10/06/2015] [Accepted: 10/12/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To quantitatively compare condylar morphology using cone beam computed tomography (CBCT) and multislice spiral computed tomography (MSCT) virtual three-dimensional surface models. STUDY DESIGN The sample consisted of secondary data analyses of CBCT and MSCT scans obtained for clinical purposes from 74 patients treated with condylar resection and prosthetic joint replacement. Three-dimensional surface models of 146 condyles were constructed from each scan modality. Across-subject models were approximated and voxel-based registration was performed between homologous CBCT and MSCT images, making it possible to create average CBCT- and MSCT-based condylar models. SPHARM-PDM software provided matching points on each corresponding model. ShapeAnalysisMANCOVA software assessed statistically significant differences between observers and imaging modalities. One-sample t-tests evaluated the null hypothesis that the mean differences between each CBCT- and MSCT-based model were not clinically significant (<.5 mm). Tests were conducted at a significance level of P < .05. RESULTS ShapeAnalysisMANCOVA showed no statistically significant difference between the average CBCT- and MSCT-based models (P > .68). During pairwise comparison, the mean difference observed was .406 mm (SD, .173). One sample t-test showed that mean differences between each set of paired CBCT- and MSCT-based models were not clinically significant (P = .411). CONCLUSION Three-dimensional surface models constructed from CBCT images are comparable to those derived from MSCT scans and may be considered reliable tools for assessing condylar morphology.
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Affiliation(s)
- Liliane Rosas Gomes
- Department of Orthodontics, Faculdade de Odontologia de Araraquara, UNESP Universidade Estadual Paulista, Sao Paulo, Brazil; Department of Orthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
| | | | - João Roberto Gonçalves
- Department of Orthodontics, Faculdade de Odontologia de Araraquara, UNESP Universidade Estadual Paulista, Sao Paulo, Brazil
| | | | - Larry M Wolford
- Departments of Oral and Maxillofacial Surgery and Orthodontics Texas, A&M University Health Science Center Baylor College of Dentistry, Baylor University Medical Center, Dallas, TX, USA
| | - Beatriz Paniagua
- Research Assistant Professor at the Department of Psychiatry, University of North Carolina, Chapel Hill, NC, USA
| | - Erika Benavides
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
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Alkan BA, Aral CA, Aral K, Acer N, Şişman Y. Quantification of circumferential bone level and extraction socket dimensions using different imaging and estimation methods: a comparative study. Oral Radiol 2015. [DOI: 10.1007/s11282-015-0225-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Maldonado A, Muñoz E. Management of an internal root resorption on a permanent tooth. A case report. JOURNAL OF ORAL RESEARCH 2015. [DOI: 10.17126/joralres.2015.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Uzun I, Gunduz K, Celenk P, Avsever H, Orhan K, Canitezer G, Ozmen B, Cicek E, Egrioglu E. Comparing the Effect of Different Voxel Resolutions for Assessment of Vertical Root Fracture of Permanent Teeth. IRANIAN JOURNAL OF RADIOLOGY : A QUARTERLY JOURNAL PUBLISHED BY THE IRANIAN RADIOLOGICAL SOCIETY 2015; 12:e18290. [PMID: 26557279 PMCID: PMC4632561 DOI: 10.5812/iranjradiol.18290] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 10/22/2014] [Accepted: 12/01/2014] [Indexed: 11/16/2022]
Abstract
BACKGROUND The teeth with undiagnosed vertical root fractures (VRFs) are likely to receive endodontic treatment or retreatment, leading to frustration and inappropriate endodontic therapies. Moreover, many cases of VRFs cannot be diagnosed definitively until the extraction of tooth. OBJECTIVES This study aimed to assess the use of different voxel resolutions of two different cone beam computerized tomography (CBCT) units in the detection VRFs in vitro. MATERIALS AND METHODS The study material comprised 74 extracted human mandibular single rooted premolar teeth without root fractures that had not undergone any root-canal treatment. Images were obtained by two different CBCT units. Four image sets were obtained as follows: 1) 3D Accuitomo 170, 4 × 4 cm field of view (FOV) (0.080 mm(3)); 2) 3D Accuitomo 170. 6 × 6 cm FOV (0.125 mm(3)); 3) NewTom 3G, 6˝ (0.16 mm(3)) and 4) NewTom 3G, 9˝ FOV (0.25 mm(3)). Kappa coefficients were calculated to assess both intra- and inter-observer agreements for each image set. RESULTS No significant differences were found among observers or voxel sizes, with high average Z (Az) results being reported for all groups. Both intra- and inter-observer agreement values were relatively better for 3D Accuitomo 170 images than the images from NewTom 3G. The highest Az and kappa values were obtained with 3D Accuitomo 170, 4 × 4 cm FOV (0.080 mm(3)) images. CONCLUSION No significant differences were found among observers or voxel sizes, with high Az results reported for all groups.
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Affiliation(s)
- Ismail Uzun
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Kaan Gunduz
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Peruze Celenk
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Hakan Avsever
- Department of Dentomaxillofacial Radiology, Gulhane Military Medical Academy (GATA), Ankara, Turkey
| | - Kaan Orhan
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - Gozde Canitezer
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Bilal Ozmen
- Department of Pedodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Ersan Cicek
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Erol Egrioglu
- Department of Statistics, Ondokuz Mayis University, Samsun, Turkey
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Khojastepour L, Moazami F, Babaei M, Forghani M. Assessment of Root Perforation within Simulated Internal Resorption Cavities Using Cone-beam Computed Tomography. J Endod 2015; 41:1520-3. [PMID: 26025347 DOI: 10.1016/j.joen.2015.04.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 04/16/2015] [Accepted: 04/19/2015] [Indexed: 01/26/2023]
Abstract
INTRODUCTION Internal root resorption lesions may perforate external root surfaces, which may not be detectable on conventional radiographic images. The purpose of this study was to evaluate the accuracy of cone-beam computed tomographic (CBCT) imaging in the detection of small perforations within simulated internal resorption cavities. METHODS Artificial internal root resorption cavities with minimal (0.1-0.2 mm) wall thickness were prepared at 64 sites on buccal and lingual halves of 32 single-rooted mandibular teeth that had been split mesiodistally. Perforations with 0.5-mm diameters were produced using a #40 K-file in half of the specimens. All teeth were placed in dry sheep mandibles and imaged using a NewTomVGi CBCT scanner (6 × 6 cm field of view, 0.1-mm resolution; NewTomQR srl, Verona, Italy). Two observers evaluated the images. Interexaminer and intraexaminer agreement were assessed using the kappa statistic. Sensitivity, specificity, and predictive values were used to assess diagnostic accuracy. RESULTS Intra- and interobserver agreement on perforation detection were high. The sensitivity and specificity of CBCT-based detection of perforation in internal root resorption were 81.3% and 84.4%, respectively. CONCLUSIONS CBCT imaging is useful for perforation detection in internal root resorption defects.
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Affiliation(s)
- Leila Khojastepour
- Department of Oral and Maxillofacial Radiology, Dental School, Shiraz University of Medical Science, Shiraz, Iran
| | - Fariborz Moazami
- Department of Endodontics, Dental School, Shiraz University of Medical Science, Shiraz, Iran
| | | | - Maryam Forghani
- Dental Research Center and Department of Endodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
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An Ex Vivo Comparison of Diagnostic Accuracy of Cone-beam Computed Tomography and Periapical Radiography in the Detection of Furcal Perforations. J Endod 2015; 41:696-702. [DOI: 10.1016/j.joen.2014.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 12/03/2014] [Accepted: 12/17/2014] [Indexed: 11/23/2022]
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Kolsuz ME, Bagis N, Orhan K, Avsever H, Demiralp KÖ. Comparison of the influence of FOV sizes and different voxel resolutions for the assessment of periodontal defects. Dentomaxillofac Radiol 2015; 44:20150070. [PMID: 25900235 DOI: 10.1259/dmfr.20150070] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVES This study assessed the influence of different voxel resolutions of two different CBCT units on the in vitro detection of periodontal defects. METHODS The study used 12 dry skulls with a maxilla and a mandible. Artificial defects (dehiscence, tunnel, fenestration) were separately created on the anterior, premolar and molar teeth using burrs. A total of 14 dehiscences, 13 fenestrations, 8 tunnels and 16 non-defect controls were used in the study. Images were obtained from two different CBCT units in six voxel sizes (voxel size: 0.080, 0.100, 0.125, 0.150, 0.160 and 0.200 mm3). Kappa coefficients were calculated to assess both intra- and interobserver agreements for each image set. RESULTS Overall intraobserver kappa coefficients ranged between 0.978 and 0.973 for the 0.080-mm3 images and between 0.751 and 0.737 for the 0.160-mm3 images, suggesting notably high intraobserver agreement for detecting periodontal defects. CBCT performed significantly better at detecting fenestrations (p<0.05) than tunnel and dehiscence defects. No statistically significant difference was found between the detection of dehiscence and tunnel defects (p>0.05). CONCLUSIONS A voxel size of 0.150 mm3 was identified as the cut-off point for overall detection of periodontal defects. CBCT should be considered the most reliable imaging modality for the diagnosis of periodontal defects.
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Affiliation(s)
- M E Kolsuz
- 1 Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - N Bagis
- 2 Department of Periodontology, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - K Orhan
- 1 Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - H Avsever
- 3 Department of Dentomaxillofacial Radiology, Division of Dentistry, GATA, Ankara, Turkey
| | - K Ö Demiralp
- 4 Ministry of Health, Public Hospitals Agency of Turkey, Bahcelievler, Ankara, Turkey
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The Effect of Alteration of the Exposure Parameters of a Cone-beam Computed Tomographic Scan on the Diagnosis of Simulated Horizontal Root Fractures. J Endod 2015; 41:520-5. [DOI: 10.1016/j.joen.2014.11.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/19/2014] [Accepted: 11/23/2014] [Indexed: 11/22/2022]
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Celikten B, Uzuntas CF, Kursun S, Orhan AI, Tufenkci P, Orhan K, Demiralp KÖ. Comparative evaluation of shaping ability of two nickel-titanium rotary systems using cone beam computed tomography. BMC Oral Health 2015; 15:32. [PMID: 25887521 PMCID: PMC4358850 DOI: 10.1186/s12903-015-0019-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 02/20/2015] [Indexed: 12/02/2022] Open
Abstract
Background We evaluated and compared the effects of different NiTi rotary systems – ProTaper Next and New One Shape – on the volume of dentin removed, canal transportation, and canal curvature in extracted human teeth using CBCT scanning with different voxel sizes. Methods Fifty extracted human maxillary first molars with mesiobuccal canal curvature (25-35°) were used. Specimens were instrumented with the ProTaper Next or New One Shape. Pre- and post-instrumentation scans were performed to compare transportation at the levels of 2, 5, and 8 mm and volumes with two different voxel sizes (0.125-and 0.100-mm3) using 3D CBCT images. This study evaluated and compare the volume of dentin removed, canal transportation, and canal curvature. Differences according to instrumentation and voxel sizes were assessed using the Mann–Whitney U-test and the Wilcoxon signed-rank test. Results Significant differences were found between apical and coronal levels for both systems (p < 0.05) in canal transportation. In comparing the systems, similar values were found at each level, without significant difference (p > 0.05) in terms of canal curvature and volume. Voxel sizes did not affect the measurements on canal volume, curvature or transportation; no significant difference was found between the 0.100- and 0.125-mm3 voxel sizes (p > 0.05). Conclusions Both instrumentation systems produced similar canal transportation and volume changes. The two voxel resolutions also showed similar results, however a 0.125-mm3 voxel size can be recommend for a flat panel CBCT scanner with lower exposure dose.
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Affiliation(s)
- Berkan Celikten
- Faculty of Dentistry, Department of Endodontics, Ankara University, Besevler, 06560, Ankara, Turkey.
| | - Ceren Feriha Uzuntas
- Faculty of Dentistry, Department of Endodontics, Ankara University, Besevler, 06560, Ankara, Turkey.
| | - Sebnem Kursun
- Faculty of Dentistry, Department of DentoMaxillofacial Radiology, Ankara University, Besevler, 06560, Ankara, Turkey.
| | - Ayse Isil Orhan
- Division of Pediatric Dentistry, Ministry of Health, 75th Year Ankara Oral and Dental Health Centre, Cebeci, 06590, Ankara, Turkey.
| | - Pelin Tufenkci
- Faculty of Dentistry, Department of Endodontics, Ankara University, Besevler, 06560, Ankara, Turkey.
| | - Kaan Orhan
- Faculty of Dentistry, Department of DentoMaxillofacial Radiology, Ankara University, Besevler, 06560, Ankara, Turkey.
| | - Kemal Özgür Demiralp
- Ministry of Health, Public Hospitals Agency of Turkey, Bahcelievler, 06490, Ankara, Turkey.
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Brüllmann D, Schulze RKW. Spatial resolution in CBCT machines for dental/maxillofacial applications-what do we know today? Dentomaxillofac Radiol 2015; 44:20140204. [PMID: 25168812 PMCID: PMC4614158 DOI: 10.1259/dmfr.20140204] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/11/2014] [Accepted: 08/27/2014] [Indexed: 12/17/2022] Open
Abstract
Spatial resolution is one of the most important parameters objectively defining image quality, particularly in dental imaging, where fine details often have to be depicted. Here, we review the current status on assessment parameters for spatial resolution and on published data regarding spatial resolution in CBCT images. The current concepts of visual [line-pair (lp) measurements] and automated [modulation transfer function (MTF)] assessment of spatial resolution in CBCT images are summarized and reviewed. Published measurement data on spatial resolution in CBCT are evaluated and analysed. Effective (i.e. actual) spatial resolution available in CBCT images is being influenced by the two-dimensional detector, the three-dimensional reconstruction process, patient movement during the scan and various other parameters. In the literature, the values range between 0.6 and 2.8 lp mm(-1) (visual assessment; median, 1.7 lp mm(-1)) vs MTF (range, 0.5-2.3 cycles per mm; median, 2.1 lp mm(-1)). Spatial resolution of CBCT images is approximately one order of magnitude lower than that of intraoral radiographs. Considering movement, scatter effects and other influences in real-world scans of living patients, a realistic spatial resolution of just above 1 lp mm(-1) could be expected.
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Affiliation(s)
- D Brüllmann
- Department of Oral Surgery and Oral Radiology, University Medical Center Mainz, Mainz, Germany
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Choi JW, Lee SS, Choi SC, Heo MS, Huh KH, Yi WJ, Kang SR, Han DH, Kim EK. Relationship between physical factors and subjective image quality of cone-beam computed tomography images according to diagnostic task. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 119:357-65. [PMID: 25592866 DOI: 10.1016/j.oooo.2014.11.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 11/12/2014] [Accepted: 11/17/2014] [Indexed: 10/24/2022]
Abstract
OBJECTIVE This study was designed to investigate the relationship between physical factors and the subjective quality of cone beam computed tomography (CBCT) images used for different diagnostic tasks. STUDY DESIGN CBCT images of a real skull phantom and a SedentexCT IQ phantom were acquired under different exposure conditions (one Dinnova3 CBCT scanner, 60-110 kV and 4-10 mA). Radiologists evaluated subjective image quality of real skull phantom images for each diagnostic task. On the basis of the evaluation results, the images were classified into two groups: acceptable and unacceptable. The modulation transfer function (MTF), contrast-to-noise ratio (CNR), and image uniformity were measured using the SedentexCT IQ phantom images. The differences in physical factors were evaluated. RESULTS MTF and CNR values showed statistical differences in image quality in two groups with regard to all diagnostic tasks. In the maxilla, MTF and CNR values showed no significant differences between periapical diagnosis and implant planning in the acceptable groups. Higher MTF and CNR values were required in the periapical diagnosis compared with the implant planning of the mandible. CONCLUSIONS This study proved that MTF and CNR values have a significant association with subjective image quality. The diagnostic task should be considered in evaluation of CBCT image quality.
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Affiliation(s)
- Jin-Woo Choi
- Department of Oral and Maxillofacial Radiology, College of Dentistry, Dankook University, Seoul, Korea
| | - Sam-Sun Lee
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea.
| | - Soon-Chul Choi
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Min-Suk Heo
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Kyung-Heo Huh
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Won-Jin Yi
- Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Se-Ryong Kang
- Department of Biomedical Radiation Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
| | - Dong-Hun Han
- Department of Preventive and Social Dentistry, School of Dentistry, Seoul National University, Seoul, Korea
| | - Eun-Kyung Kim
- Department of Oral and Maxillofacial Radiology, College of Dentistry, Dankook University, Seoul, Korea
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Da Silveira PF, Fontana MP, Oliveira HW, Vizzotto MB, Montagner F, Silveira HL, Silveira HE. CBCT-based volume of simulated root resorption - influence of FOV and voxel size. Int Endod J 2014; 48:959-65. [PMID: 25283786 DOI: 10.1111/iej.12390] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 09/30/2014] [Indexed: 01/09/2023]
Abstract
AIM To examine the influence of the field of view (FOV) and voxel size on the measurement of the volume of simulated internal root resorption (IRR) lesions through cone-beam computed tomography (CBCT). METHODOLOGY Eleven single-rooted teeth with IRR simulated by acid demineralization were studied. CBCT images were acquired using large FOV (voxel sizes of 0.200, 0.250 and 0.300 mm) and limited FOV (voxel sizes of 0.076, 0.100 and 0.200 mm). The IRR volumes were calculated using the Dolphin(®) software. Volumetric measurements were validated using IRR silicone putty casts. The analysis of variance (anova) for randomized block design complemented with the Tukey's test was employed. RESULTS IRR volumes obtained using voxel sizes of 0.200 and 0.250 mm were similar (P > 0.05). However, both these values were significantly different from that obtained using the 0.300-mm voxel (P < 0.05). There was no significant difference between IRR volumes measured through voxel sizes of 0.076 and 0.100 mm (P > 0.05), but both differed significantly from that obtained through the 0.200-mm voxel (P < 0.05). There was no significant difference between the volumetric measurements of the 0.200-mm voxel images of the restricted and large FOV protocols. The mean volumes of the silicone casts were smaller than those calculated using a 0.200-mm voxel, but were similar to those obtained using voxel sizes of 0.076 and 0.300 mm. CONCLUSIONS Despite the FOV protocol, voxel size can influence measurement of simulated IRR volumes. The importance of standardization of CBCT image acquisition protocols is emphasized, especially during follow-up of an IRR lesion, to prevent misinterpretation of its extent, which can create a bias in clinical decisions.
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Affiliation(s)
- P F Da Silveira
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - M P Fontana
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - H W Oliveira
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - M B Vizzotto
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - F Montagner
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - H L Silveira
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - H E Silveira
- Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Venskutonis T, Plotino G, Juodzbalys G, Mickevičienė L. The importance of cone-beam computed tomography in the management of endodontic problems: a review of the literature. J Endod 2014; 40:1895-901. [PMID: 25287321 DOI: 10.1016/j.joen.2014.05.009] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/16/2014] [Accepted: 05/12/2014] [Indexed: 01/26/2023]
Abstract
INTRODUCTION To obtain essential information in clinical endodontics, cone-beam computed tomographic (CBCT) imaging can be used in all phases of treatment including diagnosis, treatment planning, during the treatment phase, and through post-treatment assessment and follow-up. The purpose of this article was to review the use of CBCT imaging in the diagnosis, treatment planning, and assessing the outcome of endodontic complications. METHODS Literature was selected through a search of PubMed electronic databases for the following keywords: tooth root injuries, tooth root radiography, tooth root perforation, tomography, cone-beam computed tomography, endodontic complications, tooth root internal/external resorption, root fractures, and broken instruments. The research was restricted to articles published in English. One hundred twelve articles met the inclusion criteria and were included in this review. RESULTS Currently, intraoral radiography is the imaging technique of choice for the management of endodontic disease, but CBCT imaging appears to have a superior validity and reliability in the management of endodontic diagnosis and complications. CONCLUSIONS Endodontic cases should be judged individually, and CBCT imaging should be considered in situations in which information from conventional imaging systems may not yield an adequate amount of information to allow the appropriate management of endodontic problems. CBCT imaging has the potential to become the first choice for endodontic treatment planning and outcome assessment, especially when new scanners with lower radiation doses will be available.
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Affiliation(s)
- Tadas Venskutonis
- Department of Dental and Oral Diseases, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Gianluca Plotino
- Department of Endodontics, 'Sapienza' University of Rome, Rome, Italy.
| | - Gintaras Juodzbalys
- Department of Maxillofacial Surgery, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Lina Mickevičienė
- Department of Dental and Oral Diseases, Lithuanian University of Health Sciences, Kaunas, Lithuania
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Maret D, Peters OA, Galibourg A, Dumoncel J, Esclassan R, Kahn JL, Sixou M, Telmon N. Comparison of the Accuracy of 3-dimensional Cone-beam Computed Tomography and Micro–Computed Tomography Reconstructions by Using Different Voxel Sizes. J Endod 2014; 40:1321-6. [DOI: 10.1016/j.joen.2014.04.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 03/26/2014] [Accepted: 04/07/2014] [Indexed: 11/29/2022]
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Patel S, Durack C, Abella F, Shemesh H, Roig M, Lemberg K. Cone beam computed tomography in Endodontics - a review. Int Endod J 2014; 48:3-15. [DOI: 10.1111/iej.12270] [Citation(s) in RCA: 219] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Accepted: 02/14/2014] [Indexed: 01/27/2023]
Affiliation(s)
- S. Patel
- Department of Conservative Dentistry; King's College London Dental Institute; London & Specialist Practice, London UK
| | - C. Durack
- Riverpoint Specialist Dental Clinic; Limerick Ireland
| | - F. Abella
- Department of Restorative Dentistry and Endodontics; Section for Endodontology; Universitat Internacional de Catalunya; Barcelona Spain
| | - H. Shemesh
- Academic Center for Dentistry Amsterdam (ACTA); Amsterdam The Netherlands
| | - M. Roig
- Department of Restorative Dentistry and Endodontics; Section for Endodontology; Universitat Internacional de Catalunya; Barcelona Spain
| | - K. Lemberg
- Institute of Dentistry and Oral Radiology; University of Helsinki; Helsinki Finland
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Spin-Neto R, Gotfredsen E, Wenzel A. Impact of voxel size variation on CBCT-based diagnostic outcome in dentistry: a systematic review. J Digit Imaging 2014; 26:813-20. [PMID: 23254628 DOI: 10.1007/s10278-012-9562-7] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The objective of this study was to make a systematic review on the impact of voxel size in cone beam computed tomography (CBCT)-based image acquisition, retrieving evidence regarding the diagnostic outcome of those images. The MEDLINE bibliographic database was searched from 1950 to June 2012 for reports comparing diverse CBCT voxel sizes. The search strategy was limited to English-language publications using the following combined terms in the search strategy: (voxel or FOV or field of view or resolution) and (CBCT or cone beam CT). The results from the review identified 20 publications that qualitatively or quantitatively assessed the influence of voxel size on CBCT-based diagnostic outcome, and in which the methodology/results comprised at least one of the expected parameters (image acquisition, reconstruction protocols, type of diagnostic task, and presence of a gold standard). The diagnostic task assessed in the studies was diverse, including the detection of root fractures, the detection of caries lesions, and accuracy of 3D surface reconstruction and of bony measurements, among others. From the studies assessed, it is clear that no general protocol can be yet defined for CBCT examination of specific diagnostic tasks in dentistry. Rationale in this direction is an important step to define the utility of CBCT imaging.
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Affiliation(s)
- Rubens Spin-Neto
- Department of Dentistry-Oral Radiology Health, Aarhus University, Vennelyst Boulevard 9, Aarhus C, 8000 Aarhus, Denmark.
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Development of a New In Vitro Methodology to Simulate Internal Root Resorption. J Endod 2014; 40:211-6. [DOI: 10.1016/j.joen.2013.07.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 07/21/2013] [Accepted: 07/22/2013] [Indexed: 11/18/2022]
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