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Zhou Z, Chen Y, He A, Que X, Wang K, Yao R, Li T. NKUT: Dataset and Benchmark for Pediatric Mandibular Wisdom Teeth Segmentation. IEEE J Biomed Health Inform 2024; 28:3523-3533. [PMID: 38557613 DOI: 10.1109/jbhi.2024.3383222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Germectomy is a common surgery in pediatric dentistry to prevent the potential dangers caused by impacted mandibular wisdom teeth. Segmentation of mandibular wisdom teeth is a crucial step in surgery planning. However, manually segmenting teeth and bones from 3D volumes is time-consuming and may cause delays in treatment. Deep learning based medical image segmentation methods have demonstrated the potential to reduce the burden of manual annotations, but they still require a lot of well-annotated data for training. In this paper, we initially curated a Cone Beam Computed Tomography (CBCT) dataset, NKUT, for the segmentation of pediatric mandibular wisdom teeth. This marks the first publicly available dataset in this domain. Second, we propose a semantic separation scale-specific feature fusion network named WTNet, which introduces two branches to address the teeth and bones segmentation tasks. In WTNet, We design a Input Enhancement (IE) block and a Teeth-Bones Feature Separation (TBFS) block to solve the feature confusions and semantic-blur problems in our task. Experimental results suggest that WTNet performs better on NKUT compared to previous state-of-the-art segmentation methods (such as TransUnet), with a maximum DSC lead of nearly 16%.
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Moon S, Kang J, Kim Y, Jo E, Jeong P, Roh Y, Baek J. Carbon nanotube-based multiple source C-arm CT system: feasibility study with prototype system. OPTICS EXPRESS 2023; 31:44772-44797. [PMID: 38178538 DOI: 10.1364/oe.503421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 12/07/2023] [Indexed: 01/06/2024]
Abstract
To extend the field of view while reducing dimensions of the C-arm, we propose a carbon nanotube (CNT)-based C-arm computed tomography (CT) system with multiple X-ray sources. A prototype system was developed using three CNT X-ray sources, enabling a feasibility study. Geometry calibration and image reconstruction were performed to improve the quality of image acquisition. However, the geometry of the prototype system led to projection truncation for each source and an overlap region of object area covered by each source in the two-dimensional Radon space, necessitating specific corrective measures. We addressed these problems by implementing truncation correction and applying weighting techniques to the overlap region during the image reconstruction phase. Furthermore, to enable image reconstruction with a scan angle less than 360°, we designed a weighting function to solve data redundancy caused by the short scan angle. The accuracy of the geometry calibration method was evaluated via computer simulations. We also quantified the improvements in reconstructed image quality using mean-squared error and structural similarity. Moreover, detector lag correction was applied to address the afterglow observed in the experimental data obtained from the prototype system. Our evaluation of image quality involved comparing reconstructed images obtained with and without incorporating the geometry calibration results and images with and without lag correction. The outcomes of our simulation study and experimental investigation demonstrated the efficacy of our proposed geometry calibration, image reconstruction method, and lag correction in reducing image artifacts.
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Alalola B, Asiri A, Binmoghaiseeb I, Baharoon W, Alrassi Y, Alanizy B, Alsayari H. Impact of Bone-Grafting Materials on the Rate of Orthodontic Tooth Movement: A Systematic Review. Cureus 2023; 15:e44535. [PMID: 37790063 PMCID: PMC10544668 DOI: 10.7759/cureus.44535] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2023] [Indexed: 10/05/2023] Open
Abstract
Orthodontists may encounter patients with alveolar bony defects, which are often treated with various bone-grafting materials. The effects of different bone-grafting materials on orthodontic tooth movement (OTM) are of concern to orthodontists. Therefore, we aimed to evaluate the current status of the literature that reports on the effects of different bone-grafting materials on OTM in terms of the rate and side effects. An electronic search of the PubMed and Scopus databases and Google Scholar was performed. Two reviewers independently conducted the screening process using COVIDENCE™, and a third reviewer resolved any conflicts. SYRCLE's (Systematic Review Centre for Laboratory Animal Experimentation's) risk-of-bias tool for animal studies was utilized to assess the quality of the included studies. Out of 457 initial titles, 11 studies were finally included for data extraction. All of the included studies were animal experiments, and none of them were considered to have a low risk of bias. The included studies had varied results. However, a general tendency existed, whereby OTM in surgically treated areas with no bone grafting presented the highest OTM rate. In cases where a bone graft was used, xenografts revealed the highest OTM rate, followed by alloplasts. Lastly, the use of allografts resulted in the slowest OTM rates. The most common side effect was root resorption. In conclusion, there is a lack of high-quality evidence regarding the effects of bone-grafting materials on OTM rate. Due to the lack of human subjects, RCTs, and the heterogeneity of subjects in the current literature, the impact of bone-grafting materials on OTM deserves further investigations using more rigorous scientific methodologies.
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Affiliation(s)
- Bassam Alalola
- Preventive Dental Science, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
- Dental Department, Ministry of National Guard Health Affairs, Riyadh, SAU
| | - Ali Asiri
- Preventive Dental Science, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
- Dental Department, Ministry of National Guard Health Affairs, Riyadh, SAU
- Research Department of Epidemiology & Public Health, Institute of Epidemiology and Health Care, University College London, London, GBR
| | - Ibraheem Binmoghaiseeb
- Preventive Dental Science, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
- Dental Department, Ministry of National Guard Health Affairs, Riyadh, SAU
| | - Waleed Baharoon
- Preventive Dental Science, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
- Dental Department, Ministry of National Guard Health Affairs, Riyadh, SAU
| | - Yazeed Alrassi
- Preventive Dental Science, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
- Dental Department, Ministry of National Guard Health Affairs, Riyadh, SAU
| | - Bandar Alanizy
- Preventive Dental Science, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
- Dental Department, Ministry of National Guard Health Affairs, Riyadh, SAU
| | - Hesham Alsayari
- Preventive Dental Science, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
- Dental Department, Ministry of National Guard Health Affairs, Riyadh, SAU
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Analysis of the Frequency and Correlated Factors of Midpalatal Suture Maturation Stages in Young Adults, Based on Cone Beam Computed Tomography Imaging. J Clin Med 2022; 11:jcm11236959. [PMID: 36498534 PMCID: PMC9740603 DOI: 10.3390/jcm11236959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/15/2022] [Accepted: 11/23/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND The choice of whether to perform a palatal disjunction in constricted maxilla has traditionally been decided based on the age of the patients, although there are gradually increasing references to the fact that this is not a determining factor. The main goal of this study was to evaluate the frequency of the different stages of midpalatal suture maturation in a sample of young adults between 15 and 30 years of age. Other objectives also included analyzing the possible correlation the maturation stages could maintain with sex and age groups. METHODS 142 Cone Beam Computed Tomography (CBCT) scans of young adults were performed. The images were divided into four age groups based on age ranges of 15-18, 19-22, 23-26, and 27-30 years. Each group consisted of 26, 41, 39, and 36 patients, respectively, which were classified using Angelieri's method. In addition, sex and age groups were considered as variables, and the possible correlation of the prevalence of each one, according to age and sex, was studied. RESULTS the sample was classified into 4.9% stage B; 52.1% stage C; 27.5% stage D; and 15.5% stage E. In addition, no statistically significant correlation between sex and the maturation stages was found, but more advanced stages did appear to be related to the chronological age of the subjects. CONCLUSIONS The frequency of maturational stages where the suture is shown to be consolidated did not appear to be as high as expected; therefore, the idea of rejecting transverse plane treatment in a conventional manner in an out-of-growth patient should be discarded.
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Hou X, Xu X, Zhao M, Kong J, Wang M, Lee ES, Jia Q, Jiang HB. An overview of three-dimensional imaging devices in dentistry. J ESTHET RESTOR DENT 2022; 34:1179-1196. [PMID: 35968802 DOI: 10.1111/jerd.12955] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 12/27/2022]
Abstract
OBJECTIVE To review four types of three-dimensional imaging devices: intraoral scanners, extraoral scanners, cone-beam computed tomography (CBCT), and facial scanners, in terms of their development, technologies, advantages, disadvantages, accuracy, influencing factors, and applications in dentistry. METHODS PubMed (National Library of Medicine) and Google Scholar databases were searched. Additionally, the scanner manufacturers' websites were accessed to obtain relevant data. Four authors independently selected the articles, books, and websites. To exclude duplicates and scrutinize the data, they were uploaded to Mendeley Data. In total, 135 articles, two books, and 17 websites were included. RESULTS Research and clinical practice have shown that oral and facial scanners and CBCT can be used widely in various areas of dentistry with high accuracy. CONCLUSION Although further advancement of these devices is desirable, there is no doubt that digital technology represents the future of dentistry. Furthermore, the combined use of different devices may bring dentistry into a new era. These four devices will play a significant role in clinical utility with high accuracy. The combined use of these devices should be explored further. CLINICAL SIGNIFICANCE The four devices will play a significant role in clinical use with high accuracy. The combined use of these devices should be explored further.
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Affiliation(s)
- Xingyu Hou
- The Conversationalist Club, School of Stomatology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Xiaotong Xu
- The Conversationalist Club, School of Stomatology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Menghua Zhao
- The Conversationalist Club, School of Stomatology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Jiawen Kong
- The Conversationalist Club, School of Stomatology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Mingchang Wang
- The Conversationalist Club, School of Stomatology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Eui-Seok Lee
- Department of Oral and Maxillofacial Surgery, Graduate School of Clinical Dentistry, Korea University, Seoul, Republic of Korea
| | - Qi Jia
- The Conversationalist Club, School of Stomatology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Heng Bo Jiang
- The Conversationalist Club, School of Stomatology, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
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Ren J, You M, Wang H, Tang B, Liu Y. A comparative evaluation of cone beam computed tomography and multi-slice computed tomography on the volume of tooth in-vitro. 2021 IEEE INTERNATIONAL CONFERENCE ON MEDICAL IMAGING PHYSICS AND ENGINEERING (ICMIPE) 2021. [DOI: 10.1109/icmipe53131.2021.9698963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jiayin Ren
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Meng You
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Hu Wang
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Bei Tang
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
| | - Yuanyuan Liu
- National Clinical Research Center for Oral Diseases, Sichuan University,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,Department of Oral Radiology,Chengdu,China
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Agudelo M, Ortiz M, Herrera A. Condylar morphometry in adults with sagittal intermaxillary relationship class I, II and III using Cone Beam Computed Tomography in a Colombian population. Morphologie 2021; 106:287-293. [PMID: 34600835 DOI: 10.1016/j.morpho.2021.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 09/13/2021] [Accepted: 09/13/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE This study established the morphometry of the mandibular condyle in individuals with complete craniofacial growth and sagittal intermaxillary relationships class I, II and III using cone beam computed tomography (CBCT). MATERIALS AND METHODS Cone beam computed tomography was obtained for orthodontics diagnostic purposes. The sample was divided taking into account the ANB angle in sagittal classes I, II and III (age ranged from 18 to 40 years old). Linear measurements and shapes of 144 mandibular condyles were analyzed. RESULTS Statistically significant differences were found in measurements of the mediolateral diameter when compared with gender (P 0.000) being larger for males. Statistically significant differences between the mediolateral diameter and the coronal shape for the right as well as the left sides with P values of 0.000 and 0.47 respectively were found. CONCLUSION In this sample, it was not possible to conclusively determine the relationship between the skeletal class and the mediolateral diameter. However, more studies are required.
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Affiliation(s)
- M Agudelo
- Department of Morphology, Universidad del Valle Cali-Colombia, Calle 4 # 36-00 campus San Fernando Cali, 710034 Valle del Cauca, Colombia.
| | - M Ortiz
- Department of Morphology, Universidad del Valle Cali-Colombia, Calle 4 # 36-00 campus San Fernando Cali, 710034 Valle del Cauca, Colombia; School of Dentistry, Universidad del Valle Cali-Colombia, Valle del Cauca, Colombia
| | - A Herrera
- School of Dentistry, Universidad del Valle Cali-Colombia, Valle del Cauca, Colombia
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Kendre B, Kumar A, Shetty KN, Hedge G, Umale V, Kulshrestha R. Evaluation of stress changes in the maxilla with fixed functional appliances-A 3D FEM study. J Orthod Sci 2021; 10:10. [PMID: 34568206 PMCID: PMC8423154 DOI: 10.4103/jos.jos_33_20] [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: 06/20/2020] [Revised: 08/07/2020] [Accepted: 02/26/2021] [Indexed: 12/02/2022] Open
Abstract
AIM: To evaluate the stress changes in the maxilla during fixed functional appliance use using three-dimensional finite element method (FEM) stress analysis. SETTINGS AND SAMPLE POPULATION: A three-dimensional finite element model of the maxilla was constructed using the images generated from the cone-beam computed tomography of a patient treated for Class II malocclusion with a fixed functional orthodontic appliance. The FEM was used to study the stress changes seen in the maxilla, which were evaluated in the form of highest von Mises stress and maximum principal stress before and after the application of fixed functional appliance. RESULTS: Higher areas of stress were seen in the model of the maxilla with the fixed functional appliance (140 MPa) compared to that in the resting stage (58.99 MPa). CONCLUSIONS: An increase in the maximum principal stress and von Mises stress in the posterior regions of the maxilla and maxillary teeth was seen. The stresses seen were double than that without the appliance. A high distalization force on the maxilla was seen with the fixed functional appliance.
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Affiliation(s)
- Balaji Kendre
- Department of Orthodontics and Dentofacial Orthopedics, Yogita Dental College, Khed, Maharashtra, India
| | - Anil Kumar
- Department of Orthodontics and Dentofacial Orthopedics, AJ Institute of Dental Sciences, Mangalore, Karnataka, India
| | - K Nillian Shetty
- Department of Orthodontics and Dentofacial Orthopedics, AJ Institute of Dental Sciences, Mangalore, Karnataka, India
| | - Gautham Hedge
- Department of Orthodontics and Dentofacial Orthopedics, AJ Institute of Dental Sciences, Mangalore, Karnataka, India
| | - Vinay Umale
- Department of Orthodontics and Dentofacial Orthopedics, Yogita Dental College, Khed, Maharashtra, India
| | - Rohit Kulshrestha
- Department of Orthodontics and Dentofacial Orthopedics, Terna Dental College, Navi Mumbai, Maharashtra, India
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Orthodontists' criteria for prescribing cone-beam computed tomography-a multi-country survey. Clin Oral Investig 2021; 26:1625-1636. [PMID: 34424401 DOI: 10.1007/s00784-021-04135-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 08/06/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES This study aimed to describe and compare CBCT imaging prescription in clinical practice among orthodontists from five countries in Europe and America. Additionally, it investigated factors associated with the prescribing and the use of guidelines for CBCT imaging. MATERIALS AND METHODS A cross-sectional survey was carried out using an online questionnaire sent to all registered orthodontists in Belgium, Brazil, Canada, Romania, and the United States of America (USA). The data were analyzed by descriptive statistics, bivariate tests, and Poisson regression. RESULTS The final sample consisted of 1284 participants. CBCT was prescribed by 84.4% of the participants for selected cases (84.9%), mainly for impacted teeth (92.4%), presurgical planning (54.1%), and root resorption (51.9%). High cost was most frequently the limiting factor for CBCT prescription (55.4%). Only 45.2% of those who were using CBCT imaging reported adhering to guidelines. CBCT imaging prescription was associated with the orthodontists' countries (p < .009, except for Belgium, p = .068), while the use of guidelines was associated with the respondents' country and additional training on CBCT imaging (p < .001). CONCLUSIONS Orthodontists refer patients for CBCT for selected indications (impacted teeth, root resorption, presurgical planning, dentofacial deformities, as suggested by the international guidelines, and also for upper airway and temporomandibular joint evaluation). Many do not adhere to specific guidelines. There are substantial variations between the countries about the orthodontists' referral for CBCT and guideline usage, irrespective of gender. CBCT prescription may be limited by financial barriers, adhering to specific guidelines and prior CBCT training. CLINICAL RELEVANCE CBCT prescription among orthodontists must be based on prescription criteria and current guidelines. It is advised to improve CBCT education and training to enhance CBCT selection, referral, analysis, and interpretation in orthodontic practice.
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Hershaw CM, Mhani N, Brown A. The diagnostic value of orthopantomograms in detecting resorption of lateral incisors associated with ectopic canines: a CBCT study. J Orthod 2021; 49:195-204. [PMID: 34407655 DOI: 10.1177/14653125211039866] [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: 11/17/2022]
Abstract
OBJECTIVE To examine the diagnostic value of orthopantomograms (OPG) in the identification of root resorption of lateral incisors, secondary to an impacted canine, as confirmed by a cone-beam computed tomography (CBCT) scan. DESIGN Retrospective observational cohort study. SETTING South Wales secondary care setting: Royal Gwent Hospital, Newport and Nevill Hall Hospital, Abergavenny. METHODS A total of 40 consecutive patients with impacted canines between January 2018 and December 2019 were selected. For each patient, one consultant orthodontist examined the OPG in isolation to detect the presence and extent of resorption of lateral incisors. The CBCT report was then studied to confirm the presence and extent of pathology. Sensitivity, specificity, accuracy, positive predictive values and negative predictive values were calculated. RESULTS In total, 19 maxillary right canines, 18 maxillary left canines, one mandibular right canine and two mandibular left canines were examined. Impactions were more prevalent in the maxilla (92.5%) with higher predilection towards female patients (65%). There was higher prevalence of root resorption in the maxillary right quadrant (57.1%), in concordance with other studies. OPGs were found to have a sensitivity of 81.0% and a specificity of 10.5%, with an accuracy value of 47.5%. Positive and negative predictive values were found to be 50.0% and 33.3%, respectively. The extent of root resorption was incorrectly estimated from the OPG in 84% of cases. Correct estimation occurred in 16% of cases, with overestimation and underestimation occurring in equal proportion (42%). CONCLUSION This study demonstrates the limitations of plain film radiographs and the merits of using CBCT in the accurate diagnosis of resorption of lateral incisors with an associated impacted canine. It also gives an indication into the location prevalence of resorption in a small cohort of patients. This preliminary study establishes the basis for future, larger-scale studies where outcomes can be generalisable at a population level.
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Affiliation(s)
| | - Nizar Mhani
- Royal Gwent Hospital, Newport, UK.,Nevill Hall Hospital, Abergavenny, UK
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Khaghaninejad MS, Khojastepour L, Ahmadi H, Tavanafar S, Ebrahimi A, Mahjoori-Ghasrodashti M. Analysis of hard tissue facial symmetry after unilateral mandibular reconstruction. Maxillofac Plast Reconstr Surg 2021; 43:15. [PMID: 34059964 PMCID: PMC8166985 DOI: 10.1186/s40902-021-00299-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/10/2021] [Indexed: 11/15/2022] Open
Abstract
Background This study aimed to determine how successful reconstruction of the mandible can recover the symmetry. Materials and methods All patients who underwent surgical treatment for unilateral mandibular reconstruction in 4 years were retrospectively examined. Bilateral differences of gonion (GO) positions were measured in 3 dimensions based on immediate postoperative computed tomography. The data collected was analyzed in 3 ways: First, the comparison of bilateral differences of GO in 3 dimensions. Second, the mean Asymmetry Index in control subjects was used to divide all cases into three groups: “Symmetry,” “Asymmetry,” and “Marked asymmetry.” Third, “maximum normal asymmetry” was calculated, and all cases were categorized as below and above maximum normal asymmetry. The difference between two gonial angles was used to determine the amount of asymmetry. Results Forty-seven patients and 47 normal adults were enrolled. The mean bilateral GO difference in the control group was higher than in the study group patients, but it was not statistically significant. The mean Asymmetry Index for the control group was not also significantly higher than the study cases. The study group was “Symmetric” in 78.7% of the cases whereas the control group in 91.4%, 19.1% of the study group and 8.5% of controls were “Asymmetric,” and 2.1% of study cases and 0% of controls were “Markedly Asymmetric.” Maximum normal asymmetry was 82.9% in the study group and 97.8% in the control group. The mean differences between the right and left gonial angles were higher in the study group, but it was not significant (P = 0.1). Conclusions Our study’s results showed that bilateral symmetry in mandibular reconstruction patients was satisfactory and similar to the normal individuals.
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Affiliation(s)
- Mohamad Saleh Khaghaninejad
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Ghasrodasht St, Shiraz, Iran
| | - Leila Khojastepour
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hanie Ahmadi
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeid Tavanafar
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Ghasrodasht St, Shiraz, Iran.
| | - Alireza Ebrahimi
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Jia M, Lv Y, Xu Y, Gong Z. A comparative analysis of NLRP3-related inflammatory mediators in synovial fluid in temporomandibular joint osteoarthritis and internal derangement. BMC Musculoskelet Disord 2021; 22:229. [PMID: 33637064 PMCID: PMC7913283 DOI: 10.1186/s12891-021-04092-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 02/17/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The nucleotide-binding oligomerization domain-like receptor pyrin domain containing 3 (NLRP3) inflammasome signaling pathway is a highlighted topic in the field of inflammation. However, there is little research on the relationship between the NLRP3 inflammasome pathway and temporomandibular joint osteoarthritis (TMJOA). The aim of this study was to examine the expression of inflammatory mediators related to the NLRP3 inflammasome in the synovial fluid of patients with condylar cartilage degeneration and verify the clinical effects of sodium hyaluronic acid (HA) treatment on TMJOA. METHODS Patients diagnosed with temporomandibular joint internal derangement (TMJID) without condylar defects and TMJOA with condylar defects were divided into two groups. There were thirty patients in each group, and inflammatory mediators related to the NLRP3 inflammasome, including interleukin-1 beta (IL-1β), IL-18, NLRP3, and cysteinyl aspartate specific proteinase 1 (CASP1), in synovial fluid were measured by enzyme-linked immunosorbent assay (ELISA). Eighteen patients in the TMJOA group were retested after two HA treatments to evaluate the therapeutic effects of HA. RESULTS IL-1β, IL-18, NLRP3 and CASP1 were all positive in the two groups, and TMJOA patients with condylar defects had higher expression of these molecules than TMJID patients (P < 0.05). IL-1β, IL-18, and NLRP3 were decreased after two HA treatments (P<0.05), but there was no significant difference in CASP1 after two HA injections (P = 0.549). CONCLUSIONS The NLRP3 inflammasome signaling pathway may be involved in condylar degeneration. HA could reduce some inflammatory molecules to alleviate inflammation.
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Affiliation(s)
- Mengying Jia
- Oncology Department of Oral and Maxillofacial Surgery of The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China.,The Stomatology College of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China
| | - Yaoguang Lv
- Oncology Department of Oral and Maxillofacial Surgery of The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China.,The Stomatology College of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China
| | - Yingjie Xu
- Oncology Department of Oral and Maxillofacial Surgery of The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China.,The Stomatology College of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China
| | - Zhongcheng Gong
- Oncology Department of Oral and Maxillofacial Surgery of The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China. .,The Stomatology College of Xinjiang Medical University, Urumqi, 830054, Xin Jiang Province, China.
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13
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Attaia D, Ting S, Johnson B, Masoud MI, Friedland B, Abu El Fotouh M, Abu el Sadat S. Dose reduction in head and neck organs through shielding and application of different scanning parameters in cone beam computed tomography: an effective dose study using an adult male anthropomorphic phantom. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 130:101-109. [DOI: 10.1016/j.oooo.2019.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 11/11/2019] [Accepted: 11/22/2019] [Indexed: 10/25/2022]
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Mehta V, Ahmad N. Cone beamed computed tomography in pediatric dentistry: Concepts revisited. J Oral Biol Craniofac Res 2020; 10:210-211. [PMID: 32420015 PMCID: PMC7214934 DOI: 10.1016/j.jobcr.2020.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 03/31/2020] [Indexed: 01/19/2023] Open
Abstract
Oral diagnosis and treatment planning is of utmost importance in pediatric dentistry. Although intraoral and conventional radiographic procedures have been used extensively since decades, there two-dimensional representation has raised many questions. Cone beamed computed tomography with 3-D technology is a replacement for conventional 2-D imaging and has a wide application among child patients in pediatric dentistry. This article therefore deals with current facts and myths about clinical situations where CBCT is indicated in pediatric patients.
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Affiliation(s)
- Vivek Mehta
- Department of Pediatric and Preventive Dentistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, 110025, India
| | - Nafis Ahmad
- Department of Prosthodontics and Crown and Bridge, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, 110025, India
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Katti G, Shahbaz S, Katti C, Rahman MS. Evaluation of Midpalatal Suture Ossification Using Cone-Beam Computed Tomography: A Digital Radiographic Study. ACTA MEDICA (HRADEC KRALOVE) 2020; 63:188-193. [PMID: 33355080 DOI: 10.14712/18059694.2020.62] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND Cone beam computed tomography (CBCT) imaging techniques are the recent rage in the field of oral diagnostic imaging modality. It is noninvasive, faster and lacks anatomic superimposition. Earlier maxillary occlusal radiographs were used to assess and evaluate the mid palatal suture, but being a two dimensional imaging modality it could not assess the ossification process which takes place in multiple planes mostly due to curved nature of the palate. In this study we assessed the mid palatal suture morphology and classify them according to the variants using CBCT images. MATERIALS AND METHODS A total of 200 CBCT scans (95 males and 105 females) were evaluated in the present study from the archives of an imaging center. As per Angelieri classification the midpalatal suture was classified into five categories (A-E) depending on the degree of ossification that had taken place. Statistical analysis was done by Chi Square test using SPSS version 23.0. RESULTS There is statistically significant difference present in the stages of maturity of mid palatal suture in various age groups with Stage B is most common in Group 1 (50%), Stage C most common in Group 2 (60%) and Group 3 (40%) and Stage E more common in Group 4 (50%). CONCLUSION The results of the present study showed a wide variation in the initiation time and the degree of ossification and morphology of the midpalatal suture in different age groups. Although there was an increase in the closure of the suture with aging, age is not a reliable criterion for determining the open or closed nature of the suture. This finding is important in providing an idea as to how diverse is the ossification of maxillary sutures.
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Affiliation(s)
- Girish Katti
- Department of Oral Medicine and Radiology, Al-Badar Dental College and Hospital, Kalaburgi, Karnataka, India
| | - Syed Shahbaz
- Department of Oral Medicine and Radiology, Al-Badar Dental College and Hospital, Kalaburgi, Karnataka, India.
| | - Chandrika Katti
- Department of Orthodontia, Al-Badar Dental College and Hospital, Kalaburgi, Karnataka, India
| | - Mohd Sabyasachi Rahman
- Department of Oral Medicine and Radiology, Al-Badar Dental College and Hospital, Kalaburgi, Karnataka, India
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Adding Depth to Cephalometric Analysis: Comparing Two- and Three-Dimensional Angular Cephalometric Measurements. J Craniofac Surg 2019; 30:1568-1571. [PMID: 31299770 DOI: 10.1097/scs.0000000000005555] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Lateral cephalometric radiographs (LCR) have been the standard tool used for cephalometric analysis in craniofacial surgery. Over the past decade, a three-dimensional (3D) revolution in cephalometric analysis and surgical planning has been underway. To date, research has not validated whether cephalometric measurements taken from two-dimensional (2D) and 3D data sources are equivalent and interchangeable. The authors sought to compare angular cephalometric measurements taken with 2D and 3D modalities. METHODS Sixty-two head CT scans (36 females, 26 males) with an average age of 63 ± 20 years were studied. Twelve cephalometric angular measurements were taken from 3D reconstructed skulls using the software package Mimics 19.0 (Materialize; Leuven, Belgium). These same facial angles were measured from 2D lateral cephalograms reconstructed from the original CT scans using Dolphin 11.9. Measurements taken with both techniques were compared for agreement using a paired t test. Intra-class correlation coefficient assessment was used to determine inter-rater reliability. Statistical significance was set at P < 0.05. RESULTS Five of the 12 angular measurements (SNA, SNB, MP-FH, U1-SN, and U1-L1) demonstrated statistically significant differences (P < 0.05) between the 2D and 3D analyses. All of these differences were less than the standard deviations for the respective measure. CONCLUSION The differences between angular cephalometric values obtained from 2D LCRs and 3D CT reconstructions are small. This supports the practices of using 2D and 3D cephalometric data interchangeably in most applications. Clinicians must be selective in which measures they employ to maximize accuracy and care must be taken when measuring dental inclination with lateral cephalograms.
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Youssef Mohamed MM, Dahaba MM, Farid MM, Ali Elsayed AM. Radiographic changes in TMJ in relation to serology and disease activity in RA patients. Dentomaxillofac Radiol 2019; 49:20190186. [PMID: 31530023 DOI: 10.1259/dmfr.20190186] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
OBJECTIVES This study was undertaken as an attempt to assess radiographic temporomandibular joint (TMJ) changes in relation to rheumatoid factor (RF), anticitrullinated protein (ACCP) antibodies and disease activity score 28 (DAS28) in rheumatoid arthritis (RA) patients to find the best predictor of rheumatoid affection of the TMJ with the ultimate goal of maintaining TMJ function and preventing joint damage. METHODS 20 Rheumatoid Arthritis patients as well as 20 volunteers were included in this study. RA group were assessed for RF, ACCP, DAS28. Both groups were assessed by CBCT for TMJ dimensions and radiographic osteoarthritic changes. All data were statistically analyzed. RESULTS Rheumatoid Arthritis group showed significantly less condylar height and more radiographic osteoarthritic changes than the control group. RF showed no significant correlation with either TMJ measurements or TMJ radiographic osteoarthritic changes. ACCP showed significant inverse correlation with condylar height and anteroposterior (AP) dimensions, but non-significant relation with mediolateral dimension and radiographic osteoarthritic changes. DAS28 showed significant inverse correlation with condylar AP and mediolateral dimensions. It also showed significant correlation with flattening of the TMJ condylar head and flattening of the articular fossa. Patients with high and moderate disease activity showed significantly smaller AP TMJ dimension than patients with low disease activity. Disease activity showed statistically significant direct correlation with all osteoarthritic changes except for erosions of the glenoid fossa and condyle. CONCLUSION Disease Activity Score28 score and disease activity are strong indicators of TMJ affection in RA patients when compared to RF and ACCP. ACCP is a better indicator of changes in condylar measurements than TMJ osteoarthritic changes. While RF is the least efficient indicator of TMJ involvement in RA patients.
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Affiliation(s)
| | - Mushira M Dahaba
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Mary Medhat Farid
- Department of Oral Medicine, Periodontology, Diagnosis and Oral Radiology, Faculty of Dentistry, Ain-Shams University, Cairo, Egypt
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Shrestha A, Takahashi M, Yamaguchi T, Adel M, Furuhata M, Hikita Y, Yoshida H, Nakawaki T, Maki K. Three-dimensional evaluation of mandibular volume in patients with cleft lip and palate during the deciduous dentition period. Angle Orthod 2019; 90:85-91. [PMID: 31398065 DOI: 10.2319/112618-831.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVES To examine the relationship between mandibular volume and craniofacial morphology in patients with cleft lip and palate using cone beam computed tomography (CBCT) and to compare these findings with control (noncleft) patients undergoing CBCT for other purposes during the deciduous dentition period. MATERIALS AND METHODS Eighty-four patients were categorized into the unilateral cleft lip and alveolus (UCLA) group (n = 25; mean age, 4.60 ± 0.40 years), unilateral cleft lip and palate (UCLP) group (n = 23; mean age, 4.52 ± 0.39 years), bilateral cleft lip and palate (BCLP) group (n = 22; mean age, 4.54 ± 0.37 years), and control group without cleft (n = 14; mean age, 5.19 ± 0.52 years). Mandibular volume and craniofacial cephalometric measurements were obtained using CBCT. All measurements were assessed by analysis of covariance (ANCOVA) using Bonferroni post hoc pairwise comparison tests. RESULTS ANCOVA revealed no statistically significant differences in mandibular volume among the groups. SNA° and ANB° were significantly larger in the UCLA and BCLP groups than in the control group. SN-MP° was smallest in the UCLA group. Co-A in the UCLP group was shorter than in the UCLA and BCLP groups. Go-Gn was shortest in the UCLP and BCLP groups compared with the control group. CONCLUSIONS Three-dimensional evaluation of craniofacial morphology using CBCT can provide valuable information on malocclusion and other dentoskeletal problems among patients with CLP.
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Shanbhag VKL. Cone-Beam Computed Tomography in Orthodontics. JOURNAL OF INDIAN ORTHODONTIC SOCIETY 2019. [DOI: 10.1177/0301574219861789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Vagish Kumar L Shanbhag
- Department of Oral Medicine and Radiology, Yenepoya Dental College and Hospital, Yenepoya (Deemed to be University) University Road, Deralakatte Mangaluru, Karnataka, India
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Islam M, Uraibi AH, Al Azzawi A, Alam MK, Yusof A. Sagittal discrepancies of the jaw in a Bangladeshi cohort: three-dimensional computed tomography analysis. J Int Med Res 2019; 47:3613-3622. [PMID: 31220984 PMCID: PMC6726800 DOI: 10.1177/0300060519853927] [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] [Indexed: 11/16/2022] Open
Abstract
Objectives In orthodontic diagnosis and treatment planning, the assessment of skeletal jaw relationships is an essential step. This study aimed to evaluate skeletal jaw relationships in a Bangladeshi cohort by using traditional (ANB angle and Wits appraisal) and newly described (Beta angle, W angle, and Yen angle) sagittal measurements in three-dimensional (3D) computed tomography (CT). Methods The radiology department conducted CT scans of Bangladeshi patients. Mimics 3D imaging software (Materialise) was used to process the CT images and evaluate 3D sagittal measurements. SPSS software (IBM) was used to assess significant differences in the data at a confidence level of 5%. Independent-samples t-tests were used to evaluate sexual dimorphism for the measured values. Results In total, 85 men and 32 women were included in this study. All measurements were equivalent to the existing standards. There were no significant differences in the acquired values between men and women. Measurements were consistent with Class I normal classification. Conclusions This study established 3D CT standards for ANB, Wits appraisal, Beta angle, W angle, and Yen angle in Bangladeshi patients.
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Affiliation(s)
- Mushrath Islam
- 1 Orthodontic Unit, School of Dental Science, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Ayman Hameed Uraibi
- 2 Oral and Maxillofacial Surgery Department, College of Dentistry, University of Babylon, Hilla, Iraq
| | - Arkan Al Azzawi
- 3 Orthodontic Department, College of Dentistry, University of Babylon, Hilla, Iraq
| | - Mohammad Khursheed Alam
- 4 Orthodontic Department, College of Dentistry, Jouf University, Sakaka, Kingdom of Saudi Arabia
| | - Asilah Yusof
- 5 Craniofacial Morphology Unit, School of Dental Science, Universiti Sains Malaysia, Kelantan, Malaysia
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Gaêta-Araujo H, da Silva MB, Tirapelli C, Freitas DQ, de Oliveira-Santos C. Detection of the gubernacular canal and its attachment to the dental follicle may indicate an abnormal eruption status. Angle Orthod 2019; 89:781-787. [PMID: 30855183 DOI: 10.2319/090518-651.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To evaluate and compare the detection of gubernacular canals (GC) and their characteristics in normal and abnormal tooth eruption. MATERIALS AND METHODS Patients with unerupted teeth were classified according to sex and age. Each tooth was classified according to dental group, eruption status, formation status, angulation, and GC detection. The opening of the GC in the alveolar crest and the attachment sites in relation to the dental follicle were assessed. Data were analyzed by the chi-square and Kruskal-Wallis tests, with a significance level of 5%. RESULTS Cone-beam computed tomography scans of 159 patients were evaluated. The final sample (N = 598) consisted of 423 teeth with normal eruption, 140 impacted teeth, and 35 teeth with delayed eruption. The overall detection rate of GC was 90.6%. These rates were 94.1%, 87.1%, and 62.9% for normal eruption, impacted teeth, and delayed eruption, respectively. GC detection rates were higher in the early stages of tooth formation in normal tooth eruption and in impacted teeth. The rate of GC detection was even lower in delayed teeth when they were angulated. Unusual attachment sites of the GC to the dental follicle were associated with abnormal eruption status. CONCLUSIONS The results of the present study suggest that GC characteristics may indicate an abnormal eruption status.
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Silva Zatarain AN, Gutiérrez Rojo JF, Castrejón S. Comparación de distancias interradiculares y grosor del hueso cortical en dos sectores del maxilar inferior para colocación de mini implantes. ACTA ODONTOLÓGICA COLOMBIANA 2018. [DOI: 10.15446/aoc.v8n2.73876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Introducción: la colocación de mini implantes interradiculares, como alternativa para el anclaje de aparatología ortodóntica, varía acorde a la clasificación esquelética del paciente Clase I o II. Es necesario realizar la correcta identificación de la ubicación radicular y grosor cortical como parte del análisis estratégico del área a intervenir. Objetivo: comparar tomográficamente las distancias interradiculares y grosor del hueso cortical en dos sectores del maxilar inferior para colocación de mini implantes. Materiales y métodos: estudio transversal que incluyó 120 tomografías computarizadas de haz cónico, pertenecientes a pacientes Clase I (60) y Clase II (60) esquelética. Se identificó tomográficamente la distancia interradicular, el ancho bucolingual y el grosor del hueso cortical bucal, a partir de la cresta alveolar entre el segundo premolar y primer molar inferior derecho y entre el canino y lateral del mismo lado. Un análisis estadístico con prueba t Student al 95% de confianza comparó la ubicación de las estructuras anatómicas para clase I y II esquelética. Resultados: en la distancia interradicular, comparativamente entre clase I y II, se encontró significancia entre canino y lateral derecho (p=< 0.054) a los 8 mm. En este mismo sector, en el ancho bucolingual, se encontró diferencia significativa a 6mm de altura (p=<.04). En el grosor del hueso cortical no se encontraron diferencias estadísticas al comparar los valores para la Clase I y II. Conclusiones: en Clase I y II, el mayor espesor para la colocación de mini implantes se registró en el espacio interradicular a 8 mm de altura y en el ancho bucolingual a 6 mm.
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Shokri A, Ramezani L, Bidgoli M, Akbarzadeh M, Ghazikhanlu-Sani K, Fallahi-Sichani H. Effect of field-of-view size on gray values derived from cone-beam computed tomography compared with the Hounsfield unit values from multidetector computed tomography scans. Imaging Sci Dent 2018; 48:31-39. [PMID: 29581947 PMCID: PMC5863017 DOI: 10.5624/isd.2018.48.1.31] [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: 09/18/2017] [Revised: 01/15/2018] [Accepted: 01/30/2018] [Indexed: 11/18/2022] Open
Abstract
Purpose This study aimed to evaluate the effect of field-of-view (FOV) size on the gray values derived from conebeam computed tomography (CBCT) compared with the Hounsfield unit values from multidetector computed tomography (MDCT) scans as the gold standard. Materials and Methods A radiographic phantom was designed with 4 acrylic cylinders. One cylinder was filled with distilled water, and the other 3 were filled with 3 types of bone substitute: namely, Nanobone, Cenobone, and Cerabone. The phantom was scanned with 2 CBCT systems using 2 different FOV sizes, and 1 MDCT system was used as the gold standard. The mean gray values (MGVs) of each cylinder were calculated in each imaging protocol. Results In both CBCT systems, significant differences were noted in the MGVs of all materials between the 2 FOV sizes (P<.05) except for Cerabone in the Cranex3D system. Significant differences were found in the MGVs of each material compared with the others in both FOV sizes for each CBCT system. No significant difference was seen between the Cranex3D CBCT system and the MDCT system in the MGVs of bone substitutes on images obtained with a small FOV. Conclusion The size of the FOV significantly changed the MGVs of all bone substitutes, except for Cerabone in the Cranex3D system. Both CBCT systems had the ability to distinguish the 3 types of bone substitutes based on a comparison of their MGVs. The Cranex3D CBCT system used with a small FOV had a significant correlation with MDCT results.
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Affiliation(s)
- Abbas Shokri
- Dental Implant Research Center, Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Leila Ramezani
- Dental Implant Research Center, Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mohsen Bidgoli
- Department of Periodontics, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mahdi Akbarzadeh
- Molecular Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Karim Ghazikhanlu-Sani
- Department of Radiology, Faculty of Para Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hamed Fallahi-Sichani
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
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Wen J, Liu S, Ye X, Xie X, Li J, Li H, Mei L. Comparative study of cephalometric measurements using 3 imaging modalities. J Am Dent Assoc 2017; 148:913-921. [PMID: 29042006 DOI: 10.1016/j.adaj.2017.07.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/29/2017] [Accepted: 07/31/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND The authors conducted a study to compare 2-dimensional (2D) lateral cephalometric radiography (LCR), 2D cone-beam computer tomographic (CBCT)-generated cephalogram and 3-dimensional (3D) CBCT for assessing cephalometric measurements. METHODS The authors took 2D LCR, 2D CBCT-generated cephalogram, and 3D CBCT images involving 60 participants. They obtained 11 angular and 11 linear measurements for all images. They used 1-way analysis of variance and the Fisher least significant difference test for statistical comparisons. The authors used Pearson correlation and Pearson χ2 test to assess the relationship of these imaging modalities for vertical cephalometric analyses. RESULTS Significant differences existed between the 2D cephalograms (LCR and CBCT-generated cephalogram) and the 3D CBCT in 2 angular measurements (maxillary first incisor-nasion (N) point A [A] and mandibular first incisor-N point B (B) (P = .027 and P < .001, respectively) and 5 linear measurements (N menton[Me]/sella gonion [Go], condylion [Co]A, Co gnathion, Go-Me and anterior nasal spine-posterior nasal spine) (P < .004). These measurement values with significant differences were generally greater (approximately 5° for angular measurements and 10 millimeters for linear measurements) on the 3D CBCT scans than on the 2D cephalograms. No significant difference was found between the 2 2D cephalograms (P > .164). No significant difference was found among the 3 imaging modalities for the vertical cephalometric analyses (P > .466). CONCLUSIONS Significant differences existed between the 2D cephalograms (LCR and CBCT-generated cephalogram) and the 3D CBCT scans in 2 angular and 5 linear measurements. The 2 2D cephalograms were similar for cephalometric measurements. The 3 imaging modalities had no significant difference for the vertical cephalometric analyses. CBCT might not add value for every orthodontic situation. PRACTICAL IMPLICATIONS These results find the values of cephalometric measurements on 3D CBCT scans may be greater than on the conventional LCR for some parameters. The 2D CBCT-generated cephalogram could be an alternative to the conventional LCR for patients whose large-field-of-view CBCT images are already available.
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Tschauner S, Marterer R, Nagy E, Apfaltrer G, Riccabona M, Singer G, Stücklschweiger G, Guss H, Sorantin E. Surface radiation dose comparison of a dedicated extremity cone beam computed tomography (CBCT) device and a multidetector computed tomography (MDCT) machine in pediatric ankle and wrist phantoms. PLoS One 2017; 12:e0178747. [PMID: 28570626 PMCID: PMC5453596 DOI: 10.1371/journal.pone.0178747] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 05/18/2017] [Indexed: 11/24/2022] Open
Abstract
Objectives To evaluate and compare surface doses of a cone beam computed tomography (CBCT) and a multidetector computed tomography (MDCT) device in pediatric ankle and wrist phantoms. Methods Thermoluminescent dosimeters (TLD) were used to measure and compare surface doses between CBCT and MDCT in a left ankle and a right wrist pediatric phantom. In both modalities adapted pediatric dose protocols were utilized to achieve realistic imaging conditions. All measurements were repeated three times to prove test-retest reliability. Additionally, objective and subjective image quality parameters were assessed. Results Average surface doses were 3.8 ±2.1 mGy for the ankle, and 2.2 ±1.3 mGy for the wrist in CBCT. The corresponding surface doses in optimized MDCT were 4.5 ±1.3 mGy for the ankle, and 3.4 ±0.7 mGy for the wrist. Overall, mean surface dose was significantly lower in CBCT (3.0 ±1.9 mGy vs. 3.9 ±1.2 mGy, p<0.001). Subjectively rated general image quality was not significantly different between the study protocols (p = 0.421), whereas objectively measured image quality parameters were in favor of CBCT (p<0.001). Conclusions Adapted extremity CBCT imaging protocols have the potential to fall below optimized pediatric ankle and wrist MDCT doses at comparable image qualities. These possible dose savings warrant further development and research in pediatric extremity CBCT applications.
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Affiliation(s)
- Sebastian Tschauner
- Division of Pediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
- * E-mail:
| | - Robert Marterer
- Division of Pediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Eszter Nagy
- Division of Pediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Georg Apfaltrer
- Division of Pediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Michael Riccabona
- Division of Pediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Georg Singer
- Division of General Pediatric and Adolescence Surgery, Medical University of Graz, Graz, Austria
| | - Georg Stücklschweiger
- Competence Centre for Medical Physics and Radiation Protection, University Hospital Graz, Graz, Austria
| | - Helmuth Guss
- Competence Centre for Medical Physics and Radiation Protection, University Hospital Graz, Graz, Austria
| | - Erich Sorantin
- Division of Pediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
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Garcia EZ, Yamashita HK, Garcia DS, Padovani MMP, Azevedo RR, Chiari BM. Applicability of Cone Beam Computed Tomography to the Assessment of the Vocal Tract before and after Vocal Exercises in Normal Subjects. Folia Phoniatr Logop 2017; 68:183-188. [DOI: 10.1159/000449383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Rathi A, Rathi S. Relative imbalance as etiology of laryngomalacia – A new theory. Med Hypotheses 2017; 98:38-41. [DOI: 10.1016/j.mehy.2016.11.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 10/06/2016] [Accepted: 11/08/2016] [Indexed: 10/20/2022]
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Capaccio P, Gaffuri M, Pignataro L, Assandri F, Pereira P, Farronato G. Recurrent parotid swelling secondary to masseter muscle hypertrophy: a multidisciplinary diagnostic and therapeutic approach. Cranio 2016; 34:388-394. [PMID: 26892838 DOI: 10.1080/08869634.2016.1142694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PURPOSE To present a patient with an atypical recurrent parotid swelling due to masseter muscle hypertrophy and the diagnostic/therapeutic assessment to treat this condition. CASE REPORT A patient referring recurrent right facial swelling underwent a complete multidisciplinary assessment of the parotid region that revealed masseter muscle hypertrophy, confirmed by means of clinical (otolaryngological and gnathological evaluation), radiological (utrasonography, dynamic magnetic resonance imaging, and cone beam computed tomography), instrumental (electromyography to evaluate the right masseter muscle function and kinesiography to evaluate maximum right deflection - MaxRDefl and maximum opening - MaxMO) and sialendoscopy assessment where T0 indicates the pre-treatment values. All electromyographic and kinesiographic parameters were evaluated six months after the orthodontic application of a neuromuscular orthosis at T1. At T1, the effectiveness of the orthodontic therapy was demonstrated by the complete resolution of symptoms, and instrumental results documented more efficient muscle activity at rest and during clenching and a better mandibular position. At EMG T1, the resting and post-TENS values were, respectively, 1.2 and 1.8 microV. At kinesiography, MaxRDefl increased from 10.2 (T0) to 10.5 mm (T1); maxMO increased from 41.2 (T0) to 48 mm (T1). CONCLUSION The proposed multidisciplinary assessment based on otolaryngological, gnathological, and radiological evaluation may be useful in the case of recurrent parotid swelling secondary to masseter muscle hypertrophy to plan an appropriate management with a removable neuromuscular orthosis.
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Affiliation(s)
- Pasquale Capaccio
- a Department of Otolaryngology and Head and Neck Surgery , Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico , Milan , Italy.,c Department of Biomedical, Surgical and Dental Sciences , Università degli Studi di Milano , Milan , Italy
| | - Michele Gaffuri
- a Department of Otolaryngology and Head and Neck Surgery , Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico , Milan , Italy.,d Department of Clinical Sciences and Community Health , Università degli Studi di Milano , Milan , Italy
| | - Lorenzo Pignataro
- a Department of Otolaryngology and Head and Neck Surgery , Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico , Milan , Italy.,d Department of Clinical Sciences and Community Health , Università degli Studi di Milano , Milan , Italy
| | - Fausto Assandri
- b Department of Maxillofacial Surgery and Odontostomatology , Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico , Milan , Italy.,c Department of Biomedical, Surgical and Dental Sciences , Università degli Studi di Milano , Milan , Italy
| | - Pollyanna Pereira
- b Department of Maxillofacial Surgery and Odontostomatology , Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico , Milan , Italy.,c Department of Biomedical, Surgical and Dental Sciences , Università degli Studi di Milano , Milan , Italy
| | - Giampietro Farronato
- b Department of Maxillofacial Surgery and Odontostomatology , Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico , Milan , Italy.,c Department of Biomedical, Surgical and Dental Sciences , Università degli Studi di Milano , Milan , Italy
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