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Guo ML, Huang Z, Wang C, Wang YJ. [Investigating the effect of pre-surgical orthodontic treatment on temporomandibular joint in patients with skeletal class Ⅲ malocclusion by cone-beam computed tomography]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2019; 37:417-421. [PMID: 31512837 PMCID: PMC7030272 DOI: 10.7518/hxkq.2019.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 05/16/2019] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To investigate the effect of pre-surgical orthodontic treatment on temporomandibular joint (TMJ) in patients with skeletal class Ⅲ malocclusion treated with orthodontic-orthognathic surgical treatment. METHODS Twenty-four patients with skeletal class Ⅲ malocclusion who underwent orthodontic-orthognathic surgical treatment were included in the study. Before and after the completion of orthodontic treatment, the symptoms of TMJ were examined and recorded, and the short- and the long-axis diameter of the condylar (d), condylar height (h), joint space (L) at different angles, bilateral condylar spacing (R), and the condylar angles were measured, with scanning performed by using cone-beam computed tomography (CBCT). Then, the changes of TMJ symptoms and bone structure at different periods were analyzed. RESULTS No significant changes were observed in the joint symptoms before and after the pre-surgical orthodontic treatment. No significant changes were found in the measurements of the bone structure of TMJ in the dimensional direction (P>0.05). CONCLUSIONS In the orthodontic-orthognathic surgical treatment procedure, the pre-surgical orthodontic process does not have a significant effect on TMJ.
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Affiliation(s)
- Mei-Ling Guo
- Dept. of General Dentistry, The Affiliated Stomatological Hospital of Nanchang University & Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang 330006, China
| | - Zhen Huang
- Dept. of Orthodontics, The Affiliated Stomatological Hospital of Nanchang University & Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang 330006, China
| | - Chong Wang
- Danshui Branch in Huizhou Stomatological Hospital, Huizhou 516001, China
| | - Yu-Jiang Wang
- Dept. of Oral and Maxillofacial Surgery, The Affiliated Stomatological Hospital of Nanchang University & Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang 330006, China
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Obelenis Ryan DP, Bianchi J, Ignácio J, Wolford LM, Gonçalves JR. Cone-beam computed tomography airway measurements: Can we trust them? Am J Orthod Dentofacial Orthop 2019; 156:53-60. [DOI: 10.1016/j.ajodo.2018.07.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 07/01/2018] [Accepted: 07/01/2018] [Indexed: 11/25/2022]
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The crown-root morphology of central incisors in different skeletal malocclusions assessed with cone-beam computed tomography. Prog Orthod 2019; 20:20. [PMID: 31111270 PMCID: PMC6527728 DOI: 10.1186/s40510-019-0272-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 04/02/2019] [Indexed: 02/05/2023] Open
Abstract
Background To determine the discrepancy of crown-root morphology of central incisors among different types of skeletal malocclusion using cone-beam computed tomography (CBCT) and to provide guidance for proper torque expression of anterior teeth and prevention of alveolar fenestration and dehiscence. Methods In this retrospective study, a total of 108 CBCT images were obtained (ranging from 18.0 to 30.0 years, mean age 25.8 years). Patients were grouped according to routine sagittal and vertical skeletal malocclusion classification criteria. The patients in sagittal groups were all average vertical patterns, with Class I comprised 24 patients—14 females and 10 males; Class II comprised 20 patients—13 females and 7 males; and Class III comprised 22 subjects—13 females and 9 males. The patients in vertical groups were all skeletal Class I malocclusions, with low angle comprised 21 patients—12 females and 9 males; average angle comprised 24 patients; and high angle comprised 21 patients—11 females and 10 males. All the CBCT data were imported into Invivo 5.4 software to obtain a middle labio-lingual section of right central incisors. Auto CAD 2007 software was applied to measure the crown-root angulation (Collum angle), and the angle formed by a tangent to the central of the labial surface of the crown and the long axis of the crown (labial surface angle). One-way analysis of variance (ANOVA) and Scheffe’s test were used for statistical comparisons at the P < 0.05 level, and the Pearson correlation analysis was applied to investigate the association between the two measurements. Results The values of Collum angle and labial surface angle in maxillary incisor of Class II and mandibular incisor of Class III were significantly greater than other types of sagittal skeletal malocclusions (P < 0.05); no significant difference was detected among vertical skeletal malocclusions. Notably, there was also a significant positive correlation between the two measurements. Conclusions The maxillary incisor in patients with sagittal skeletal Class II malocclusion and mandibular incisor with Class III malocclusion present remarkable crown-root angulation and correspondingly considerable labial surface curvature. Equivalent deviation during bracket bonding may cause greater torque expression error and increase the risk of alveolar fenestration and dehiscence.
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Leonardi R. Cone-beam computed tomography and three-dimensional orthodontics. Where we are and future perspectives. J Orthod 2019; 46:45-48. [PMID: 31056034 DOI: 10.1177/1465312519840029] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cone beam computerised tomography (CBCT) is becoming increasingly common in the orthodontic office and a wide range of software is now available. What is the state-of-the-art of CBCT prescription according to international guidelines? And what might we expect from CBCT in orthodontics in the future?
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Affiliation(s)
- Rosalia Leonardi
- Department of Orthodontics, University of Catania, Catania, Italy
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Liu PC, Wang ZX. [Application of surgical locating guides on impacted supernumerary teeth extraction]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2019; 37:58-61. [PMID: 30854820 DOI: 10.7518/hxkq.2019.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To study the application of surgical locating guides based on cone beam computed tomography (CBCT) and computer-aided design/computer-aided manufacturing (CAD/CAM) technique on extraction of impacted supernumerary teeth. METHODS This study included 15 patients with impacted supernumerary teeth in anterior maxillary. Surgical approach was determined by CBCT. Surgical locating guides of labial approach or palatal approach were designed and fabricated by CAD/CAM technique. Impacted supernumerary teeth were extracted under the location of surgical locating guides. RESULTS Surgical locating guides were well attached in the operation. The impacted supernumerary teeth were located and exposed rapidly, and the adjacent important anatomical structures were avoided. CONCLUSIONS Surgical locating guides benefit the accurate detection and reduction of trauma in extraction of impacted supernumerary teeth.
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Affiliation(s)
- Pei-Cai Liu
- Dept. of Oral and Maxillofacial Surgery, Tianjin Fifth Central Hospital, Tianjin 300450, China
| | - Zhi-Xing Wang
- Dept. of Oral and Maxillofacial Surgery, Tianjin Fifth Central Hospital, Tianjin 300450, China
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Park J, Baumrind S, Curry S, Carlson SK, Boyd RL, Oh H. Reliability of 3D dental and skeletal landmarks on CBCT images. Angle Orthod 2019; 89:758-767. [PMID: 30883187 DOI: 10.2319/082018-612.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES To quantify reliability of three-dimensional skeletal landmarks and a comprehensive set of dental landmarks in cone-beam computed tomography (CBCT) and to determine the shapes of envelope of error. MATERIALS AND METHODS Three judges located 31 skeletal landmarks and 60 dental landmarks on the pre- and posttreatment CBCT images of 22 patients. Landmark error was determined by calculating the distance of deviation of landmark locations around their average. Standard deviation and mean radial spherical error were calculated. Scatterplots were constructed to characterize envelope of error. RESULTS The midline landmarks of the cranial base were highly reliable. Bilateral skeletal landmarks tended to have larger error than midline landmarks. Among the nonconventional landmarks, fronto-zygomatic suture, condyle, and mental foramen showed relatively high reliability. However, foramen spinosum and temporal fossa showed larger errors. Gonion was the least reliable landmark. Most dental landmarks were located more reliably than skeletal landmarks. The highest reliability was found at incisal edges. Mesiobuccal cusp of first molars also showed high reliability. CONCLUSIONS There were differences in the size and shape of the distributions of errors of different landmarks. Most landmarks showed elongated envelopes. Bilateral structures tended to show greater errors than midline structures. Most dental landmarks were more reliable than skeletal landmarks.
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Vale F, Rodrigues ML, Francisco I, Roseiro A, Santos I, Caramelo F, Rodrigues MJ. Short‐term pharyngeal airway space changes after mandibular advancement surgery in Class
II
patients—a two‐dimensional retrospective study. Orthod Craniofac Res 2019; 22:81-86. [DOI: 10.1111/ocr.12264] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Francisco Vale
- Institute of OrthodonticsFaculty of MedicineUniversity of Coimbra Coimbra Portugal
| | | | - Inês Francisco
- Institute of OrthodonticsFaculty of MedicineUniversity of Coimbra Coimbra Portugal
| | - Ana Roseiro
- Institute of OrthodonticsFaculty of MedicineUniversity of Coimbra Coimbra Portugal
| | - Inês Santos
- Department of Maxillofacial SurgeryHospital of the University of Coimbra Coimbra Portugal
| | - Francisco Caramelo
- Institute of Clinical and Biomedical Research of Coimbra (iCBR)Faculty of MedicineUniversity of Coimbra Coimbra Portugal
| | - Maria João Rodrigues
- Institute of Temporomandibular Disorders and Orofacial PainFaculty of MedicineUniversity of Coimbra Coimbra Portugal
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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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Heney CM, Arzi B, Kass PH, Hatcher DC, Verstraete FJM. Diagnostic Yield of Dental Radiography and Cone-Beam Computed Tomography for the Identification of Anatomic Structures in Cats. Front Vet Sci 2019; 6:58. [PMID: 30873423 PMCID: PMC6404553 DOI: 10.3389/fvets.2019.00058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/08/2019] [Indexed: 01/19/2023] Open
Abstract
The objective of this study was to evaluate the diagnostic yield of dental radiography (DR) and 3 cone-beam computed tomography (CBCT) methods for the identification of predefined anatomic structures in cats. For 5 feline cadaver heads and 22 client-owned cats admitted for evaluation and treatment of dental disease, a total of 22 predefined anatomic structures were evaluated separately by use of the DR method and 3 CBCT software modules [multiplanar reconstructions (MPR), tridimensional (3-D) rendering, and reconstructed panoramic views (Pano)]. A semi quantitative scoring system was used, and mean scores were calculated for each anatomic structure and imaging method. The Friedman test was used to evaluate values for significant differences in diagnostic yield. For values that were significant the Wilcoxon signed rank test was used with the Bonferroni-Holm multiple comparison adjustment to determine significant differences among each of the possible pairs of diagnostic methods. Differences of diagnostic yield among the DR and 3 CBCT methods were significant for 17 of 22 anatomic structures. For these structures, DR scores were significantly higher than scores for Pano views for 2 of 17 structures, but DR scores were significantly lower than scores for Pano views for 6 anatomic structures, tridimensional rendering for 10 anatomic structures, and MPR for 17 anatomic structures. In conclusion, it was found that CBCT methods were better suited than DR for the identification of anatomic structures in cats. Results of this study can serve as a basis for CBCT evaluation of dentoalveolar and other maxillofacial bony lesions in cats.
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Affiliation(s)
- Colleen M Heney
- Dentistry and Oral Surgery Service, William Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Boaz Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Philip H Kass
- Department of Population Health and Reproduction School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - David C Hatcher
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States.,Diagnostic Dental Imaging Center, Sacramento, CA, United States
| | - Frank J M Verstraete
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
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Heney CM, Arzi B, Kass PH, Hatcher DC, Verstraete FJM. The Diagnostic Yield of Dental Radiography and Cone-Beam Computed Tomography for the Identification of Dentoalveolar Lesions in Cats. Front Vet Sci 2019; 6:42. [PMID: 30847347 PMCID: PMC6393352 DOI: 10.3389/fvets.2019.00042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/01/2019] [Indexed: 12/11/2022] Open
Abstract
The objective of this study was to evaluate the diagnostic yield of dental radiography (DR) and 3 cone-beam computed tomography (CBCT) software modules for the identification of 32 pre-defined dentoalveolar lesions in cats. For 5 feline cadaver heads and 22 client-owned cats admitted for evaluation and treatment of dental disease, 32 predefined dentoalveolar lesions were evaluated separately and scored by use of dental radiography and 3 CBCT software modules [multiplanar reconstructions (MPR), tridimensional (3-D) rendering, and reconstructed panoramic views]. A qualitative scoring system was used. Dentoalveolar lesions were grouped into 14 categories for statistical analysis. Point of reference for presence or absence of a dentoalveolar lesion was determined as the method that could be used to clearly identify the disorder as being present. Accuracy, sensitivity, specificity, and positive and negative predictive values were calculated with the McNemar χ2 test of marginal homogeneity of paired data. When all 3 CBCT software modules were used in combination, the diagnostic yield of CBCT was significantly higher than that of dental radiography for 4 of 14 categories (missing teeth, horizontal bone loss, loss of tooth integrity, feline resorptive lesions), and higher, although not significantly so, for 9 categories (supernumerary teeth, supernumerary roots, abnormally shaped roots, vertical bone loss, buccal bone expansion, periapical disease, inflammatory root resorption, and external replacement root resorption). In conclusion, we found that CBCT provided more clinically relevant detailed information as compared to dental radiography. Therefore, CBCT should be considered better suited for use in diagnosing dentoalveolar lesions in cats.
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Affiliation(s)
- Colleen M Heney
- Dentistry and Oral Surgery Service, School of Veterinary Medicine, William Pritchard Veterinary Medical Teaching Hospital, University of California, Davis, Davis, CA, United States
| | - Boaz Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - Philip H Kass
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
| | - David C Hatcher
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States.,Diagnostic Dental Imaging Center, Sacramento, CA, United States
| | - Frank J M Verstraete
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, United States
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Domingo-Clérigues M, Montiel-Company JM, Almerich-Silla JM, García-Sanz V, Paredes-Gallardo V, Bellot-Arcís C. Changes in the alveolar bone thickness of maxillary incisors after orthodontic treatment involving extractions - A systematic review and meta-analysis. J Clin Exp Dent 2019; 11:e76-e84. [PMID: 30697398 PMCID: PMC6343989 DOI: 10.4317/jced.55434] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 12/03/2018] [Indexed: 11/16/2022] Open
Abstract
Background Orthodontic treatment involving en-masse retraction of incisors following premolar extractions, may induce morphological alterations of the alveolar bone surrounding the anterior teeth. Objective To assess changes in alveolar bone thickness around the incisors of extraction patients measured with CBCT. Material and Methods An electronic search was conducted in PubMed, Scopus, Embase and Cochrane Library, using search terms, with no limitation on publication date, up to April 2018. The articles selected for analysis included randomized controlled trials, case-control studies and cohort studies of patients treated with fixed appliances and premolar extractions, which had measured alveolar bone thickness with CBCT before and after treatment. Changes in bone thickness were calculated and the heterogeneity of the studies was assessed using the I2 and Cochran’s Q tests. Results Of the 136 articles identified in the initial search, 19 were related to the review subject. After removing a further 14 that did not meet the inclusion criteria, 5 articles were selected for analysis. All five were retrospective studies of medium quality. The main changes in alveolar bone thickness were found in the labial cervical third of the central incisor, presenting increases of 0.4-0.64 mm. On the palatal side the results varied considerably. Conclusions A significant increase in alveolar bone thickness occurs in the labial cervical third of the central incisor. These changes may be influenced by incisor position and inclination, the orthodontic technique and mechanics employed, the timing of the final CBCT scan and the bone remodeling capacity during en-masse retraction. Key words:Cone-beam computed tomography, alveolar bone, orthodontics.
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Asaria I, Lagravère MO. Évaluation par imagerie tridimensionnelle des modifications du canal mandibulaire. Int Orthod 2018; 16:712-732. [DOI: 10.1016/j.ortho.2018.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Three-Dimensional Changes of the Auditory Canal in a Three-Year Period during Adolescence Using CBCTs. Int J Dent 2018; 2018:5463753. [PMID: 30425744 PMCID: PMC6217877 DOI: 10.1155/2018/5463753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/23/2018] [Accepted: 09/20/2018] [Indexed: 11/17/2022] Open
Abstract
Purpose There is a lack of identifying suitable regions in the head that can be used for three-dimensional superimposition techniques. For this reason, with the use of cone-beam computed tomography (CBCT), the ear canals were analyzed to verify changes during a period of three years in the adolescent years. Methods CBCTs from fifty-six patients (ages: 10 to 20) were used to landmark the anatomy of the ear canals. Each patient was analyzed using two CBCT reconstructions that were taken approximately three years apart. AVIZO® software was used to locate 28 landmarks distributed following the ear canal path and foramina (ovale, spinosum, rotundum, etc.) in the cranial base to obtain spatial relationships. Three-dimensional coordinates were obtained from the landmarks, and the average distance between various landmark pairings was calculated. The repeated measure ANCOVA was used to determine statistical significance. Results In the main data set, the largest mean distance change was found to be 4.37 mm ± 18.29 mm between the left foramen ovale and the left superior medial ear canal opening. The smallest mean distance change was 0.18 mm ± 3.25 mm between the right inferior lateral ear canal opening and the right inferior medial ear canal opening. Conclusions During the adolescent years, the ear canal presents dimensional changes. Even though in different areas throughout the canal, the average distances were minor, still, large standard deviations were present; thus, caution should be taken when trying to use this structure for superimposition of CBCTs.
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Asaria I, Lagravère MO. Mandibular canal changes assessed using three-dimensional imaging (CBCT). Int Orthod 2018; 16:712-732. [PMID: 30343067 DOI: 10.1016/j.ortho.2018.09.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
INTRODUCTION To identify changes in the adolescent mandibular canal (MC) using cone-beam computer tomography (CBCT) by locating three-dimensional (3D) anatomical landmarks in the mandible for later growth and treatment applications. METHODS Two CBCT images taken 1.5-2 years apart for 50 patients (ages 11-17) were landmarked using AVIZO®. Six core landmarks were placed relative to the right and left MCs. Three-dimensional coordinates (x, y, z) were obtained. Average distances between paired landmarks were measured using a paired samples t-test. Mean distance differences <1.50mm were determined clinically insignificant and stable. To determine landmark position consistency, repeat CBCTs from 11 patients were landmarked three times one week apart. Coordinates were determined and intra-class correlation coefficient statistics (ICC), mean error difference and confidence intervals were measured. RESULTS X and y-coordinates had an internal consistency of 1.00. Z-coordinates had a consistency of 0.995 or higher. Measurement error was <1mm. The largest mean distance change was 2.25mm±3.06mm between the right mandibular foramen and the landmark directly on the right canal, closest to the mesial root of the first molar. The smallest mean distance change was <0.01mm±1.7mm between the right and left mental foramina. Additionally, the bilateral mandibular foramina, bilateral distal and mesial roots of the first molar, and bilateral regions on the MC inferior to both distal and mesial roots of the first molar were stable. CONCLUSION All landmarks were determined reliable. The region between the right and left mental foramina was found most stable for this time period in adolescents.
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Affiliation(s)
- Iman Asaria
- Schulich School of Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Manuel O Lagravère
- Department of Orthodontics, School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
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The Effect of Implant-Induced Artifacts on Interpreting Adjacent Bone Structures on Cone-Beam Computed Tomography Scans. IMPLANT DENT 2018; 27:10-14. [PMID: 29095787 DOI: 10.1097/id.0000000000000684] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Cone-beam computed tomography (CBCT) imaging can be used to visualize anatomical structures before implant placement. The aim of this study is to evaluate the impact of implant artifacts on the accuracy of measuring periimplant bone dimensions. MATERIALS AND METHODS Nineteen implants were placed into 9 fresh, frozen cadavers. A CBCT scan was taken, the implants were removed, and a second scan was taken. Implant dimensions and periimplant bone measurements were calculated. The mean differences were compared with paired t tests. Pearson's correlation coefficients were calculated for bone thickness measurements. DISCUSSION No significant differences were found between the implant dimension or bone thickness measurements on each scan. Bone thickness at the implant platform and apex were significantly correlated (P < 0.001). CONCLUSION The presence of dental implants did not impact the accuracy of cone-beam computed tomography (CBCT) measurements of bone thickness by metallic artifacts.
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Tepedino M, Cornelis MA, Chimenti C, Cattaneo PM. Correlation between tooth size-arch length discrepancy and interradicular distances measured on CBCT and panoramic radiograph: an evaluation for miniscrew insertion. Dental Press J Orthod 2018; 23:39.e1-39.e13. [PMID: 30427499 PMCID: PMC6266319 DOI: 10.1590/2177-6709.23.5.39.e1-13.onl] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 03/19/2018] [Indexed: 12/26/2022] Open
Abstract
INTRODUCTION The selection of appropriate sites for miniscrew insertion is critical for clinical success. OBJECTIVES The aim of the present study was to evaluate how interradicular spaces measured on panoramic radiograph compare with Cone-Beam Computed Tomography (CBCT), and how crowding can influence the presence of available space for miniscrew insertion, in order to define a new "safe zones" map. METHODS A total of 80 pre-treatment panoramic radiographs and 80 CBCT scans with corresponding digital models were selected from the archives of the department of Dentistry, Aarhus University. Crowding was measured on digital models, while interradicular spaces mesial to the second molars were measured on panoramic radiographs and CBCTs. For panoramic radiographs, a magnification factor was calculated using tooth widths measured on digital models. Statistical analyses were performed to investigate the correlation between the amount of crowding and the available interradicular space. Visual maps showing the amount of interradicular spaces measured were drawn. RESULTS The most convenient interradicular spaces are those between the second molar and the first premolar in the mandible, and between the central incisors in the maxilla. However, some spaces were revealed to be influenced by crowding. CONCLUSIONS Calibration of panoramic radiographs is of utmost importance. Generally, panoramic radiographs underestimate the available space. Preliminary assessment of miniscrew insertion feasibility and the related selection of required radiographs can be facilitated using the new "safe zone" maps presented in this article.
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Affiliation(s)
- Michele Tepedino
- University of L’Aquila, Department of Biotechnological and Applied Clinical Sciences (L’Aquila, Italy)
| | - Marie A. Cornelis
- Aarhus University, Faculty of Health, Department of Dentistry and Oral Health, Section of Orthodontics (Aarhus, Denmark)
| | - Claudio Chimenti
- University of L’Aquila, Department of Biotechnological and Applied Clinical Sciences (L’Aquila, Italy)
| | - Paolo M. Cattaneo
- Aarhus University, Faculty of Health, Department of Dentistry and Oral Health, Section of Orthodontics (Aarhus, Denmark)
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Ketoff S, Sigaux N, Raberin M, Bouletreau P. [Dental complications during orthodontic preparation and orthognathic surgery]. Orthod Fr 2018; 89:137-144. [PMID: 30040613 DOI: 10.1051/orthodfr/2018010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 12/12/2018] [Indexed: 11/14/2022]
Abstract
INTRODUCTION Orthodontic-surgical treatment can present risks to the dental organ and the periodontium. Despite the low incidence of such cases, these complications can compromise a treatment plan. Practitioners should be aware of these potential complications, take them into account during treatment in order to reduce their negative impact and, if necessary, manage them by orthodontic-surgical collaboration. MATERIALS AND METHODS In this article, the authors present several potential complications that can occur during treatment. CONCLUSION The information given to the patient about the risks inherent in the implementation of an orthodontic-surgical protocol must necessarily include the risks of lesion to the dental organ and the periodontium.
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Affiliation(s)
- Serge Ketoff
- Service de Chirurgie maxillo-faciale, Hôpital Paris Saint-Joseph, 185 rue Raymond-Losserand, 75014 Paris, France
| | - Nicolas Sigaux
- Service de Chirurgie maxillo-faciale, Centre hospitalier Lyon-Sud, 165 chemin du Grand-Revoyet, 69495 Pierre Bénite cedex, France
| | | | - Pierre Bouletreau
- Service de Chirurgie maxillo-faciale, Centre hospitalier Lyon-Sud, 165 chemin du Grand-Revoyet, 69495 Pierre Bénite cedex, France
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Abdelkarim A, Jerrold L. Clinical considerations and potential liability associated with the use of ionizing radiation in orthodontics. Am J Orthod Dentofacial Orthop 2018; 154:15-25. [DOI: 10.1016/j.ajodo.2018.01.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 01/01/2018] [Accepted: 01/01/2018] [Indexed: 10/28/2022]
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Lombardo L, Arreghini A, Guarneri MP, Lauritano D, Nardone M, Siciliani G. Unexpected artefacts and occult pathologies under CBCT. ORAL & IMPLANTOLOGY 2018; 10:97-104. [PMID: 29876034 DOI: 10.11138/orl/2017.10.2.097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Purpose To present the most frequent occult pathologies unexpectedly encountered via cone-beam computed tomography (CBCT), with particular reference to the diagnostic role of the dentist and that of the radiographer, with a view to clarifying where the diagnostic responsibility lies. Material and methods A narrative literature review on the most diffused occult pathologies under CBCT was conducted, with iconographical guide as an example for each category. Results The most frequent forms of unexpected pathologies encountered are: the presence of foreign bodies, airway anomaly, and the presence of radio-opacity or -transparency in the maxillofacial district. Conclusions The orthodontists must know that they are responsible to recognize these frequent, and potentially serious, pathologies of the head and neck. If the dentist feels unable to take on this responsibility, he or she should, however, be sure to have the scans read by a specialist radiologist.
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Affiliation(s)
- L Lombardo
- Department of Orthodontics, University of Ferrara, Ferrara, Italy
| | - A Arreghini
- Department of Orthodontics, University of Ferrara, Ferrara, Italy
| | - M P Guarneri
- Department of Orthodontics, University of Ferrara, Ferrara, Italy
| | - D Lauritano
- Department of Translational Medicine and Surgery, Neuroscience Center of Milan, University of Milano Bicocca, Monza, Italy
| | - M Nardone
- Ministry of Public Health, Rome, Italy
| | - G Siciliani
- Department of Orthodontics, University of Ferrara, Ferrara, Italy
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Shahidi S, Zamiri B, Abolvardi M, Akhlaghian M, Paknahad M. Comparison of Dental Panoramic Radiography and CBCT for Measuring Vertical Bone Height in Different Horizontal Locations of Posterior Mandibular Alveolar Process. JOURNAL OF DENTISTRY (SHIRAZ, IRAN) 2018; 19:83-91. [PMID: 29854881 PMCID: PMC5960739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
STATEMENT OF THE PROBLEM Accurate measurement of the available bone height is an essential step in the pre-surgical phase of dental implantation. Panoramic radiography is a unique technique in the pre-surgical phase of dental implantations because of its low cost, relatively low-dose, and availability. PURPOSE This article aimed to assess the reliability of dental panoramic radiographs in the accurate measurement of the vertical bone height with respect to the horizontal location of the alveolar crest. MATERIALS AND METHOD 132 cone-beam computed tomography (CBCT) of the edentulous mandibular molar area and dental panoramic radiograph of 508 patients were selected. Exclusion criteria were bone abnormalities and detectable ideal information on each modality. The alveolar ridge morphology was categorized into 7 types according to the relative horizontal location of the alveolar crest to the mandibular canal based on CBCT findings. The available bone height (ABH) was defined as the distance between the upper border of the mandibular canal and alveolar crest. One oral radiologist and one oral surgeon measured the available bone height twice on each modality with a 7-dayinterval. RESULTS We found a significant correlation between dental panoramic radiographs and cone-beam computed tomography values (ICC=0.992, p< 0.001). A positive correlation between the horizontal distance of the alveolar crest to the mandibular canal and measured differences between two radiographic modalities had been found (r=0.755, p< 0.001). For each single unit of increase in the horizontal distance of the alveolar crest to the mandibular canal, dental panoramic radiographs showed 0.87 unit of overestimation (p< 0.001). CONCLUSION Dental panoramic radiographs can be employed safely in the pre-surgical phase of dental implantation in posterior alveolus of mandible, especially in routine and simple cases.
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Affiliation(s)
- Shoaleh Shahidi
- Dept. of Oral and Maxillofacial Radiology, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Barbad Zamiri
- Dept. of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Masoud Abolvardi
- Postgraduate Student of Orthodontics, Dept. of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Marzieh Akhlaghian
- Postgraduate Student of Prosthodontics, Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Maryam Paknahad
- Oral and Dental Disease Research Center, Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
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Abstract
Orthodontists treat malocclusions by applying three-dimensional forces. For years, the diagnosis of this three-dimensional condition and the related treatment plan has been based on two-dimensional imaging. Lateral and anteroposterior cephalometric, panoramic, and periapical radiographs are some of the two-dimensional radiographs routinely used in orthodontics. Despite being highly beneficial in evaluating skeletal and dental relations, these radiographs fail to provide sufficient two-dimensional information in certain cases. The purpose of this compilation is to review the use of cone-beam computed tomography in orthodontics.
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Affiliation(s)
| | - Burçak Kaya
- Department of Orthodontics, Başkent University School of Dentistry, Ankara, Turkey
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Marcu M, Hedesiu M, Salmon B, Pauwels R, Stratis A, Oenning ACC, Cohen ME, Jacobs R, Baciut M, Roman R, Dinu C, Rotaru H, Barbur I. Estimation of the radiation dose for pediatric CBCT indications: a prospective study on ProMax3D. Int J Paediatr Dent 2018; 28:300-309. [PMID: 29356184 DOI: 10.1111/ipd.12355] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND An increasing number of CBCT units and a wide variability of radiation doses have been reported in dentistry lately. AIM To estimate the effective, cumulative, and organ absorbed doses in children exposed to CBCT over 2 years. DESIGN A prospective study was conducted in children who underwent CBCT diagnostic imaging with the ProMax3D machine. Organ and effective doses were calculated by Monte Carlo simulation using 5- and 8-year-old pediatric voxel phantoms. Extrapolation procedures were applied to estimate doses for other ages and CBCT protocols used in clinical conditions. RESULTS The median effective dose was 137.9 μSv, and the median cumulative dose was 231.4 μSv. Statistically significant differences in the effective doses and cumulative doses were found for various indications of CBCT in children (P < 0.001). The median absorbed organ dose for brain and thyroid was significantly higher for the clinical condition that required large FOVs (2.5 mGy and 1.05 mGy, respectively) compared to medium (0.19 and 0.51 mGy) and small FOVs (0.07 and 0.24 mGy; P < 0.05). The radiation dose of salivary glands did not vary significantly with FOV. CONCLUSION The results revealed the variation of CBCT doses and the influence of FOV size in pediatric exposure.
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Affiliation(s)
- Maria Marcu
- Department of Oral Radiology, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Mihaela Hedesiu
- Department of Oral Radiology, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Benjamin Salmon
- EA 2496-Orofacial Pathologies, Imaging and Biotherapies Lab and Dental Medicine Department, Bretonneau Hospital, HUPNVS, AP-HP, Paris Descartes University - Sorbonne Paris Cité, Paris, France
| | - Ruben Pauwels
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Andreas Stratis
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Anne Caroline Costa Oenning
- EA 2496-Orofacial Pathologies, Imaging and Biotherapies Lab and Dental Medicine Department, Bretonneau Hospital, HUPNVS, AP-HP, Paris Descartes University - Sorbonne Paris Cité, Paris, France.,Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas (Unicamp), Piracicaba, Sao Paulo, Brazil
| | - Mike E Cohen
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, Catholic University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Mihaela Baciut
- Department of Maxillofacial Surgery, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Raluca Roman
- Department of Oral Radiology, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Cristian Dinu
- Department of Maxillofacial Surgery, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Horatiu Rotaru
- Department of Maxillofacial Surgery, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ioan Barbur
- Department of Maxillofacial Surgery, Faculty of Dentistry, 'Iuliu Hatieganu' University of Medicine and Pharmacy, Cluj-Napoca, Romania
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Döring S, Arzi B, Barich CR, Hatcher DC, Kass PH, Verstraete FJM. Evaluation of the diagnostic yield of dental radiography and cone-beam computed tomography for the identification of anatomic landmarks in small to medium-sized brachycephalic dogs. Am J Vet Res 2018; 79:54-61. [PMID: 29287153 DOI: 10.2460/ajvr.79.1.54] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the diagnostic yield of dental radiography (Rad method) and 3 cone-beam CT (CBCT) methods for the identification of predefined anatomic landmarks in brachycephalic dogs. ANIMALS 19 client-owned brachycephalic dogs admitted for evaluation and treatment of dental disease. PROCEDURES 26 predefined anatomic landmarks were evaluated separately by use of the RAD method and 3 CBCT software modules (serial CBCT slices and custom cross sections, tridimensional rendering, and reconstructed panoramic views). A semiquantitative scoring system was used, and mean scores were calculated for each anatomic landmark and imaging method. The Friedman test was used to evaluate values for significant differences in diagnostic yield. For values that were significant, the Wilcoxon signed rank test was used with the Bonferroni-Holm multiple comparison adjustment to determine significant differences among each of the 6 possible pairs of diagnostic methods. RESULTS Differences of diagnostic yield among the Rad and 3 CBCT methods were significant for 19 of 26 anatomic landmarks. For these landmarks, Rad scores were significantly higher than scores for reconstructed panoramic views for 4 of 19 anatomic landmarks, but Rad scores were significantly lower than scores for reconstructed panoramic views for 8 anatomic landmarks, tridimensional rendering for 18 anatomic landmarks, and serial CBCT slices and custom cross sections for all 19 anatomic landmarks. CONCLUSIONS AND CLINICAL RELEVANCE CBCT methods were better suited than dental radiography for the identification of anatomic landmarks in brachycephalic dogs. Results of this study can serve as a basis for CBCT evaluation of dental disorders in brachycephalic dogs.
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Stoustrup P, Iversen CK, Kristensen KD, Resnick CM, Verna C, Nørholt SE, Abramowicz S, Küseler A, Cattaneo PM, Herlin T, Pedersen TK. Assessment of dentofacial growth deviation in juvenile idiopathic arthritis: Reliability and validity of three-dimensional morphometric measures. PLoS One 2018. [PMID: 29534095 PMCID: PMC5849319 DOI: 10.1371/journal.pone.0194177] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Introduction Patients with juvenile idiopathic arthritis (JIA) and involvement of the temporomandibular joint (TMJ) often experience abnormal facial growth. Three-dimensional (3D) assessment of dentofacial growth deviation has become more common with advancement and commercialization of imaging technologies. However, no standardized guidelines exist for interpretation of 3D imaging in patients with JIA. The aim of this study was to propose and validate morphometric measures for the 3D radiographic assessment of dentofacial growth deviation in patients with JIA to enhance: 1) Description of dentofacial growth deviation; 2) Treatment planning; 3) Longitudinal follow-up. Methods The study was conducted in a standardized sequential-phased approach involving: 1) Preliminary decision-making; 2) Item generation; 3) Test of content-validity; 4) Test of reliability; 5) Test of construct validity; 6) Establishment of final recommendations. Results Twenty-one morphometric measures were evaluated. Based on results of reliability and validity-testing including subjects with JIA (n = 70) and non-JIA controls (n = 19), seven measures received a “high recommendation” score. Those measures were associated with posterior mandibular height, occlusal cant, mandibular asymmetry, mandibular inclination, and anterior/posterior lower face height. Nine other measures were “moderately recommended” and five received a “somewhat recommendation” score. Conclusion Seven morphometric measures were considered very useful in the 3D assessment of growth deviation in patients with TMJ disease associated with JIA. These variables can be used to standardize the description of dentofacial deformities and to plan corrective interventions.
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Affiliation(s)
- Peter Stoustrup
- Section of Orthodontics, Aarhus University, Aarhus, Denmark
- * E-mail:
| | | | - Kasper Dahl Kristensen
- Section of Orthodontics, Aarhus University, Aarhus, Denmark
- Section of Orthodontics, University of Bergen, Bergen, Norway
| | - Cory M. Resnick
- Harvard School of Dental Medicine, Boston, MA, United States of America
- Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, United States of America
| | - Carlalberta Verna
- Clinic for Orthodontics and Pediatric Dentistry, University Center for Dental Medicine, University of Basel, Basel, Switzerland
| | - Sven Erik Nørholt
- Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
- Section of Oral Maxillofacial Surgery, Aarhus University, Aarhus, Denmark
| | - Shelly Abramowicz
- Oral and Maxillofacial Surgery and Pediatrics, Emory University, Children’s Healthcare of Atlanta, Atlanta, GA, United States of America
| | - Annelise Küseler
- Section of Orthodontics, Aarhus University, Aarhus, Denmark
- Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
| | | | - Troels Herlin
- Department of Pediatrics, Aarhus University Hospital, Aarhus, Denmark
| | - Thomas Klit Pedersen
- Section of Orthodontics, Aarhus University, Aarhus, Denmark
- Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
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Cone-beam CT in paediatric dentistry: DIMITRA project position statement. Pediatr Radiol 2018; 48:308-316. [PMID: 29143199 DOI: 10.1007/s00247-017-4012-9] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 09/11/2017] [Accepted: 10/11/2017] [Indexed: 01/05/2023]
Abstract
DIMITRA (dentomaxillofacial paediatric imaging: an investigation towards low-dose radiation induced risks) is a European multicenter and multidisciplinary project focused on optimizing cone-beam CT exposures for children and adolescents. With increasing use of cone-beam CT for dentomaxillofacial diagnostics, concern arises regarding radiation risks associated with this imaging modality, especially for children. Research evidence concerning cone-beam CT indications in children remains limited, while reports mention inconsistent recommendations for dose reduction. Furthermore, there is no paper using the combined and integrated information on the required indication-oriented image quality and the related patient dose levels. In this paper, therefore, the authors initiate an integrated approach based on current evidence regarding image quality and dose, together with the expertise of DIMITRA's members searching for a state of the art. The aim of this DIMITRA position statement is to provide indication-oriented and patient-specific recommendations regarding the main cone-beam CT applications in the pediatric field. The authors will review this position statement document when results regarding multidisciplinary approaches evolve, in a period of 5 years or earlier.
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Tsolakis AI, Kalavritinos M, Bitsanis E, Sanoudos M, Benetou V, Alexiou K, Tsiklakis K. Reliability of different radiographic methods for the localization of displaced maxillary canines. Am J Orthod Dentofacial Orthop 2018; 153:308-314. [PMID: 29407509 DOI: 10.1016/j.ajodo.2017.06.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 06/01/2017] [Accepted: 06/01/2017] [Indexed: 11/17/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate the reliability of the radiographic images of the main conventional x-ray techniques compared with the information from cone-beam computed tomography (CBCT). METHODS Twenty patients with unilateral or bilateral impaction of the maxillary canines had radiographic examinations by means of periapical x-rays, occlusal x-rays, panoramic x-rays, and CBCT scans. Three experienced orthodontists examined all x-rays from each patient and evaluated the radiographic images of the impacted canines. The examiners were asked to detect resorption in adjacent teeth and the buccal-palatal position of the impacted canines. Agreement between examiners was statistically tested. RESULTS Different diagnoses were produced by the 3 examiners regarding localization of the impacted canines and the presence or absence of root resorption of the adjacent teeth in conventional radiographic images. It appears that whereas panoramic x-ray is more sensitive in detecting resorption and tooth position, occlusal and periapical imaging have higher specificity and positive predictive value. The examiners were in good or excellent agreement when occlusal and periapicals were used for the definite diagnosis of resorption and tooth position. There was no disagreement of the examiners in CBCT images, which were used as the gold standard. CONCLUSIONS Conventional radiographic methods demonstrated a more subjective diagnostic procedure compared with CBCT images. CBCT is a more accurate and precise examination method compared with conventional radiography for the localization of impacted teeth and root resorption of the adjacent teeth.
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Affiliation(s)
- Apostolos I Tsolakis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
| | - Michael Kalavritinos
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Elias Bitsanis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Mattheos Sanoudos
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Vassiliki Benetou
- Department of Epidemiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantina Alexiou
- Department of Oral and Maxillofacial Radiology, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantinos Tsiklakis
- Department of Oral and Maxillofacial Radiology, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
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Hallmark of success: top 50 classics in oral and maxillofacial cone-beam computed tomography. Pol J Radiol 2018; 83:e11-e18. [PMID: 30038673 PMCID: PMC6047082 DOI: 10.5114/pjr.2018.74343] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 05/29/2017] [Indexed: 01/28/2023] Open
Abstract
Purpose The aim of this study was to identify the top 50 cited articles on the use of cone-beam computed tomography (CBCT) for oral and maxillofacial applications and to summarise the characteristics of the most impactful research articles in this domain. Material and methods A database was generated by combining the search results from Thomson Reuters Web of Science and Elsevier's Scopus to ensure that all top-cited publications were captured. We used three search fields to generate the database: 1) CBCT, 2) oral and maxillofacial pathologies, and 3) oral and maxillofacial anatomical structures. Publications were then ranked by citation counts and reviewed by two independent reviewers. Results A total of 50 top publications were included in the study. Their citation count ranged from 43 to 170 with a median of 55.5. Five publications were cited more than 100 times. All except for one paper were published after 2000. The most well published journal was the American Journal of Orthodontics and Dentofacial Orthopedics (n = 12), and the United States of America (n = 15) was the most productive country in the field. The majority of the studies (n = 27) discussed the imaging of primary tooth pathologies, but there are also a significant number of articles that discuss imaging of bone grafts or dental implants (n = 7), upper airways (n = 5), the skull (n = 4), and other maxillofacial structures (n = 7). Conlcusions Our study identifies 50 research articles with the highest number of citations in oral and maxillofacial CBCT, discusses the characteristics and commonalities between these articles, and predicts future trends in the field.
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Venkatesh E, Elluru SV. Cone beam computed tomography: basics and applications in dentistry. J Istanb Univ Fac Dent 2017; 51:S102-S121. [PMID: 29354314 PMCID: PMC5750833 DOI: 10.17096/jiufd.00289] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 09/11/2017] [Indexed: 01/31/2023] Open
Abstract
The introduction of cone beam computed tomography (CBCT) devices, changed the way oral and maxillofacial radiology is practiced. CBCT was embraced into the dental settings very rapidly due to its compact size, low cost, low ionizing radiation exposure when compared to medical computed tomography. Alike medical CT, 3 dimensional evaluation of the maxillofacial region with minimal distortion is offered by the CBCT. This article provides an overview of basics of CBCT technology and reviews the specific application of CBCT technology to oral and maxillofacial region with few illustrations.
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Affiliation(s)
- Elluru Venkatesh
- Department of Oral, Basic and Clinical Sciences, College of Dentistry, Qassim Private Colleges, Kingdom of Saudi Arabia
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Ponce-Garcia C, Lagravere-Vich M, Cevidanes LHS, de Olivera Ruellas AC, Carey J, Flores-Mir C. Reliability of three-dimensional anterior cranial base superimposition methods for assessment of overall hard tissue changes: A systematic review. Angle Orthod 2017; 88:233-245. [PMID: 29189039 DOI: 10.2319/071217-468.1] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE The purpose of this systematic review was to synthesize the available literature concerning the reliability of three-dimensional superimposition methods when assessing changes in craniofacial hard tissues. MATERIALS AND METHODS Four electronic databases were searched. Two authors independently reviewed potentially relevant articles for eligibility. Clinical trials, cohort, case-control, and cross-sectional studies that evaluated the reliability of three-dimensional superimposition methods on the anterior cranial base were included. RESULTS Six studies fulfilled the inclusion criteria. Four studies used the voxel-based registration method, one used the landmark-based method and one used the surface-based method. Regarding reliability, the voxel-based studies showed on average a difference of 0.5 mm or less between images. The optimized analysis using a six-point correction algorithm in the landmark-based method showed 1.24 mm magnitude of error between images. CONCLUSIONS Although reliability appears to be adequate, the small sample size and high risk of bias among studies make available evidence still insufficient to draw strong conclusions.
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Hourfar J, Bister D, Lux CJ, Al-Tamimi B, Ludwig B. Anatomic landmarks and availability of bone for placement of orthodontic mini-implants for normal and short maxillary body lengths. Am J Orthod Dentofacial Orthop 2017; 151:878-886. [PMID: 28457265 DOI: 10.1016/j.ajodo.2016.09.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 09/01/2016] [Accepted: 09/01/2016] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Increasing numbers of orthodontic mini-implants are placed in the anterior maxilla. To our knowledge, bone levels and root proximity of patients with cephalometrically short maxillae have not been investigated before. The first, second, and third rugae were used as clinical reference lines, and the aim of this study was to measure bone availability in that area by comparing patients with short and normal maxillary body lengths. METHODS The sample consisted of 21 patients in each group: short maxillary body length and normal maxillary body length. The patients' study models were bisected, and the outline of the palatal contour was marked on the surface. The models were scanned, and the palatal contours were superimposed on the palatal structures of their respective initial cephalometric headfilms, and the vertical and oblique bone levels of the sagittal plane were compared using the Student t test. The level of significance was set at P <0.05. RESULTS Compared with maxillae of normal maxillary body length, less bone was available in maxillae of short maxillary body length. However, the differences did not reach clinical or statistical significance (P >0.05) at the third rugae. CONCLUSIONS Almost equivalent average bone depth at the third rugae in patients with normal and short maxillary body lengths suggests that this site can be used for 8-mm long obliquely inserted orthodontic mini-implants.
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Affiliation(s)
- Jan Hourfar
- Private Practice, Reinheim, Germany; Department of Orthodontics, University of Saarland, Homburg, Germany
| | - Dirk Bister
- Department of Orthodontics, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Christopher J Lux
- Department of Orthodontics, University of Heidelberg, Heidelberg, Germany
| | - Bouthayna Al-Tamimi
- Dental and Maxillofacial Surgery Department, Great Ormond Street Hospital, NHS Foundation Trust, London, United Kingdom
| | - Björn Ludwig
- Private Practice, Traben-Trarbach, Germany; Department of Orthodontics, University of Saarland, Homburg, Germany.
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Ahn HW, Seo DH, Kim SH, Park YG, Chung KR, Nelson G. Morphologic evaluation of dentoalveolar structures of mandibular anterior teeth during augmented corticotomy-assisted decompensation. Am J Orthod Dentofacial Orthop 2017; 150:659-669. [PMID: 27692424 DOI: 10.1016/j.ajodo.2016.03.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 03/01/2016] [Accepted: 03/01/2016] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Our aim in this study was to evaluate the effect of augmented corticotomy on the decompensation pattern of mandibular anterior teeth, alveolar bone, and surrounding periodontal tissues during presurgical orthodontic treatment. METHODS Thirty skeletal Class III adult patients were divided into 2 groups according to the application of augmented corticotomy labial to the anterior mandibular roots: experimental group (with augmented corticotomy, n = 15) and control group (without augmented corticotomy, n = 15). Lateral cephalograms and cone-beam computed tomography images were taken before orthodontic treatment and before surgery. The measurements included the inclination and position of the mandibular incisors, labial alveolar bone area, vertical alveolar bone height, root length, and alveolar bone thickness at 3 levels surrounding the mandibular central incisors, lateral incisors, and canines. RESULTS The mandibular incisors were significantly proclined in both groups (P <0.001); however, the labial movement of the incisor tip was greater in the experimental group (P <0.05). Significant vertical alveolar bone loss was observed only in the control group (P <0.001). The middle and lower alveolar thicknesses and labial alveolar bone area increased in the experimental group. In the control group, the upper and middle alveolar thicknesses and labial alveolar bone area decreased significantly. There were no significant differences in dentoalveolar changes between the 3 kinds of anterior teeth in each group, except for root length in the experimental group (P <0.05). CONCLUSIONS Augmented corticotomy provided a favorable decompensation pattern of the mandibular incisors, preserving the periodontal structures surrounding the mandibular anterior teeth for skeletal Class III patients.
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Affiliation(s)
- Hyo-Won Ahn
- Assistant professor, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea
| | - Dong-Hwi Seo
- Postgraduate student, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea
| | - Seong-Hun Kim
- Professor and chair, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea.
| | - Young-Guk Park
- Professor, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea
| | - Kyu-Rhim Chung
- Clinical professor, Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea
| | - Gerald Nelson
- Clinical professor, Division of Orthodontics, Department of Orofacial Science, University of California, San Francisco, Calif
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82
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Ahlbrecht CA, Ruellas ACDO, Paniagua B, Schilling JA, McNamara JA, Cevidanes LHS. Three-dimensional characterization of root morphology for maxillary incisors. PLoS One 2017; 12:e0178728. [PMID: 28594852 PMCID: PMC5464764 DOI: 10.1371/journal.pone.0178728] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 05/17/2017] [Indexed: 11/23/2022] Open
Abstract
The aim of this study was to test the reproducibility of three-dimensional (3D) surface models of maxillary incisors and to propose a characterization of root morphology. The sample was comprised of pre-treatment cone-beam computed tomography (CBCT) images of fifty-five patients. The CBCTs were used to construct 3D surface models of the maxillary incisors. The reproducibility of surface models was tested by repeated construction of them by two observers. A 3D surface model that corresponded to the average of all lateral and all central incisors was generated. 3D surface distances and vector differences were calculated for each individual tooth and the average of the teeth considered. The corresponding points on the 3D surface mesh for each subgroup were compared statistically to those of the neutral subgroup using shape analysis MANCOVA and Hotelling's t-statistic (p < 0.05). Repeated construction of surface models demonstrated adequate inter-rater reproducibility. The distribution of 3D models into root morphology subgroups was: blunt (11% and 26% of the central and lateral incisors, respectively), conical (15% of the central incisors), long (27% and 20% of the central and lateral incisors, respectively), and short (15% and 4% of the central and lateral incisors, respectively). Compared to the neutral average, statistically significant differences in root morphology were found for blunt, long, conical, and short central incisors and for blunt, long, and short lateral incisors. We can conclude that 3D surface models construction for upper incisors is reproducible. 3D shape analysis using CBCT images allows a phenotypic characterization of incisor root morphology.
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Affiliation(s)
- Carly A. Ahlbrecht
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Antonio Carlos de Oliveira Ruellas
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Orthodontics and Pediatric Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Beatriz Paniagua
- Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Juan A. Schilling
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - James A. McNamara
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Lucia Helena Soares Cevidanes
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
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83
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İşman Ö, Yılmaz HH, Aktan AM, Yilmaz B. Indications for cone beam computed tomography in children and young patients in a Turkish subpopulation. Int J Paediatr Dent 2017; 27:183-190. [PMID: 27452447 DOI: 10.1111/ipd.12250] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Cone beam computed tomography (CBCT) imaging is widely used in children; however, it remains controversial because of the health effects of radiation. AIM This retrospective study investigated the indications for CBCT and dentomaxillofacial pathologies in paediatric patients. MATERIALS AND METHODS CBCT images of 329 paediatric patients (i.e., aged <18 years) were investigated retrospectively. CBCT images were obtained with five fields of view (FOV). CBCT indications were categorised as surgery and orthodontics. The effects of age, sex, and FOV were evaluated. The level of significance was P = 0.05. RESULTS The most common orthodontic indications were malocclusion and dentomaxillofacial anomalies (38.5%), followed by the localisation of impacted teeth (33.1%). There was no relationship between sex and indications. There were significant associations between age groups and malocclusion and dentomaxillofacial anomalies, localisation of impacted teeth, and trauma. The face was the most frequently imaged region, followed by the jaws (maxilla and mandible). CONCLUSION The most common indication for CBCT was malocclusion and dentomaxillofacial anomalies in the primary and permanent dentition age groups, whereas the localisation of impacted teeth was the most common indication in the mixed dentition age group. Generally, CBCT was indicated in orthodontics and surgery.
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Affiliation(s)
- Özlem İşman
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Gaziantep University, Gaziantep, Turkey
| | - Hasan Hüseyin Yılmaz
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Şifa University, İzmir, Turkey
| | - Ali Murat Aktan
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Uşak University, Uşak, Turkey
| | - Büşra Yilmaz
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Gaziantep University, Gaziantep, Turkey
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84
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Franzotti Sant'Anna E, Carneiro da Cunha A, Paludo Brunetto D, Franzotti Sant'Anna C. Camouflage of a high-angle skeletal Class II open-bite malocclusion in an adult after mini-implant failure during treatment. Am J Orthod Dentofacial Orthop 2017; 151:583-597. [PMID: 28257743 DOI: 10.1016/j.ajodo.2016.01.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 01/01/2016] [Accepted: 01/01/2016] [Indexed: 11/18/2022]
Abstract
The treatment of skeletal anterior open-bite malocclusion requires complex orthodontic planning that considers its multifactorial etiology, treatment limitations, and high relapse rates. This case report illustrates a successful treatment approach for a skeletal high-angle Class II malocclusion in an adult with a severe open bite. The treatment consisted of a high-pull headgear therapy after mini-implants failure during fixed orthodontic therapy. Adequate esthetics and function were achieved. Despite its low probability, the unexpected event of mini-implant loosening during complex treatments should be considered. Therefore, classic orthodontic mechanics should be established, especially when treating patients for whom invasive procedures such as miniplates or orthognathic surgery are not available options.
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Affiliation(s)
| | - Amanda Carneiro da Cunha
- Department of Pedodontics and Orthodontics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Daniel Paludo Brunetto
- Department of Pedodontics and Orthodontics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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85
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Feragalli B, Rampado O, Abate C, Macrì M, Festa F, Stromei F, Caputi S, Guglielmi G. Cone beam computed tomography for dental and maxillofacial imaging: technique improvement and low-dose protocols. Radiol Med 2017; 122:581-588. [DOI: 10.1007/s11547-017-0758-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/21/2017] [Indexed: 12/01/2022]
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86
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Talaat S, Kaboudan A, Bourauel C, Ragy N, Kula K, Ghoneima A. Validity and reliability of three-dimensional palatal superimposition of digital dental models. Eur J Orthod 2017; 39:365-370. [DOI: 10.1093/ejo/cjx008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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87
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Angulations of Anterior Teeth With Reference to the Alveolar Bone Measured by CBCT in a Chinese Population. IMPLANT DENT 2017; 24:397-401. [PMID: 26057779 DOI: 10.1097/id.0000000000000291] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To analyze angulations of anterior teeth with reference to the alveolar bone. METHODS Cone-beam computed tomographic (CBCT) images of 105 participants were taken with the same machine (ProMax 3D Max CBCT), showing the intact anterior teeth. The angulations formed between the long axis of the anterior teeth and the alveolus were measured using cross-sectional images. The thicknesses of alveolar bone on different area of root surfaces were also measured. RESULTS Maxillary anterior teeth were found to be close to the buccal alveolar surface in apical level with the angulations referred to alveolar bone in center incisor, lateral incisor, and canine were 17.65 ± 6.8, 18.79 ± 7.4, and 23.82 ± 6.96 degrees, respectively. Means of angulations of mandibular anterior teeth were less than 8 degree. The thicknesses of buccal bone at mid-root level in 77% to 90% maxillary anterior teeth were less than 1 mm. The determinations provided high intrarater/interrater reliability. CONCLUSIONS The application of CBCT is reliable for a complete calculation of angulations and thicknesses in a Chinese Han population. As a result, adequate planning combined with image examination preoperatively would contribute to a favorable outcome.
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88
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Pham V, Lagravère MO. Alveolar bone level changes in maxillary expansion treatments assessed through CBCT. Int Orthod 2017; 15:103-113. [PMID: 28065704 DOI: 10.1016/j.ortho.2016.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES Determine changes in alveolar bone levels during expansion treatments as assessed through cone-beam computer tomography (CBCT). METHODS Sixty-one patients from Edmonton, Canada, with maxillary transverse deficiencies were split into three groups. One group was treated with a bone-anchored expander, another group was treated with a tooth-borne maxillary expander (Hyrax) and one group was untreated. CBCTs were obtained from each patient at two time points (initialT1 and at removal of appliance after 6 months T2). CBCTs were analyzed using AVIZO software and landmarks were placed on different dental and skeletal structures. Intra-examiner reliability for landmarks was done by randomly selecting 10 images and measuring each landmark 3 times, 1 week apart. Descriptive statistics, intraclass correlation coefficients (ICC) and ANOVA analysis were used to determine if there were changes to the alveolar bone levels and if these changes were statistically significant within each group. RESULTS Landmarks reliability showed an ICC of at least 0.99 with a 95% confidence interval and a mean measurement error of at least 0.2067mm. Descriptive statistics show that changes in alveolar bone levels were less than 1mm for all three groups and therefore clinically insignificant. Changes between groups were not statistically different (P<0.05) from one another with the exception of 8 distances. However, since the distances were small, they were not considered clinically significant. CONCLUSION Alveolar bone level changes were similar in maxillary expansion treatments and in the control group. The effects of maxillary expansion treatments on alveolar bone levels are not clinically significant.
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Affiliation(s)
- Vi Pham
- ECHA 5-524, Department of Dentistry, University of Alberta, T5G 2N8 Edmonton, AB, Canada
| | - Manuel O Lagravère
- ECHA 5-524, Department of Dentistry, University of Alberta, T5G 2N8 Edmonton, AB, Canada.
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89
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Changements du niveau de l’os alvéolaire lors du traitement par expansion maxillaire évalué par CBCT. Int Orthod 2017; 15:103-113. [PMID: 28065705 DOI: 10.1016/j.ortho.2016.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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90
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Nasef AA, El-Beialy AR, Eid FHK, Mostafa YA. Accuracy of Orthodontic 3D Printed Retainers versus Thermoformed Retainers. ACTA ACUST UNITED AC 2017. [DOI: 10.4236/ojmi.2017.74017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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91
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Gibson CF, Mandelaris GA. Restoration of the Anterior Segment in a Cleft Palate in Conjunction with Surgically Facilitated Orthodontic Therapy: An Interdisciplinary Approach. Dent Clin North Am 2016; 59:733-53. [PMID: 26140978 DOI: 10.1016/j.cden.2015.03.011] [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: 11/27/2022]
Abstract
A 26-year-old woman was referred to a periodontal surgical practice for concerns related to gingival recession. After several consultations among the orthodontist, periodontist, and cosmetic/restorative dentist, she decided to have surgically facilitated orthodontic therapy as part of a collaborative, interdisciplinary treatment planning process to correct her constricted maxillary arch form, augment thin dentoalveolar facial bone, simultaneously with gaining root coverage as well as improving attached gingiva width and mucogingival thickness. As a consequence of changing the arch form, an improvement in the buccal corridor space was gained which optimized her smile display.
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Affiliation(s)
- Chiann Fan Gibson
- Private Practice, Restorative Dentistry, Naperville, IL, USA; Department of Prosthodontics, Tufts School of Dental Medicine, Boston, MA, USA.
| | - George A Mandelaris
- Private Practice, Periodontics and Dental Implant Surgery (Periodontal Medicine & Surgical Specialists, Ltd), Park Ridge, IL, USA; Private Practice, Periodontics and Dental Implant Surgery (Periodontal Medicine & Surgical Specialists, Ltd), 1 South 224 Summit Avenue, Suite 205, Oakbrook Terrace, IL 60181, USA; Department of Graduate Periodontics, University of Illinois College of Dentistry, Chicago, IL, USA
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92
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Aoun G, Nasseh I. Mesiodens Within the Nasopalatine Canal: An Exceptional Entity. Clin Pract 2016; 6:903. [PMID: 28174622 PMCID: PMC5294929 DOI: 10.4081/cp.2016.903] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 11/30/2016] [Indexed: 12/01/2022] Open
Abstract
A supernumerary tooth is one that is supplementary to the normal dentition. It can be found anywhere at the dental arch. A mesiodens is a supernumerary tooth located between the two maxillary central incisors usually palatally or within the alveolar process. Less frequently, the mesiodens is in relation with the nasal floor and the nasopalatine canal walls. This paper presents a very rare case of an impacted inverted mesiodens located inside the nasopalatine canal and found incidentally with a cone-beam computed tomography examination.
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Affiliation(s)
- Georges Aoun
- Department of Oral Pathology and Diagnosis, Lebanese University , Beirut, Lebanon
| | - Ibrahim Nasseh
- Department of Dentomaxillofacial Radiology and Imaging, Lebanese University , Beirut, Lebanon
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93
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Dindaroğlu F, Duran GS, Tekeli A, Görgülü S, Doğan S. Evaluation of the Relationship between Curve of Spee, WALA-FA Distance and Curve of Wilson in Normal Occlusion. Turk J Orthod 2016; 29:91-97. [PMID: 30112481 DOI: 10.5152/turkjorthod.2016.1614] [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] [Received: 11/12/2016] [Accepted: 12/03/2016] [Indexed: 11/22/2022]
Abstract
Objective To test the hypotheses that (i) there is a significant correlation between the curve of Spee (COS), basal arch (WALA ridge) to dental arch distance (WALA-FA distance) and curve of Wilson (CW) and that (ii) the deepening of the COS is affected by the CW and the WALA-FA distance. Methods Mandibular models of 50 patients aged between 20 and 35 years were scanned with TRIOS. The xyz coordinate system was determined, and a reference occlusal plane was generated. The depth of the COS, the CW, and WALA-FA distance were measured using an engineering software. Results The greatest difference in the measurement of the depth of the COS between the right and left was found to be 0.41±0.50 mm in the first molar teeth. On the basis of the results of Pearson correlation analysis, there was no strong correlation between the depth of the COS, the CW, and the WALA-FA distance. Conclusion It was shown that there was no strong correlation between the depth of COS, CW, and WALA-FA distance. The CW and WALA-FA distance could not be effective in the deepening of the COS.
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Affiliation(s)
- Furkan Dindaroğlu
- Department of Orthodontics, Ege University School of Dentistry, İzmir, Turkey
| | - Gökhan Serhat Duran
- Department of Orthodontics, Sağlık Bilimleri University Gülhane School of Dentistry, Ankara, Turkey
| | - Alaattin Tekeli
- Department of Orthodontics, Sağlık Bilimleri University Gülhane School of Dentistry, Ankara, Turkey
| | - Serkan Görgülü
- Department of Orthodontics, Sağlık Bilimleri University Gülhane School of Dentistry, Ankara, Turkey
| | - Servet Doğan
- Department of Orthodontics, Ege University School of Dentistry, İzmir, Turkey
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94
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Grünheid T, Kirk DC, Larson BE. The effect of root and bone visualization on perceptions of the quality of orthodontic treatment simulations. Angle Orthod 2016; 87:384-390. [PMID: 27874283 DOI: 10.2319/082416-634.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To evaluate the effect of root and bone visibility on orthodontists' perceptions of the quality of treatment simulations. MATERIAL AND METHODS An online survey was used to present orthodontists with setups generated for 10 patients in two different types of view: with and without bone and roots as modeled from a cone-beam computed tomography (CBCT) scan. The orthodontists were asked to rate the quality of the setups from poor to ideal on a 100-point visual analog scale and, if applicable, to identify features of concern that led them to giving a setup a less-than-ideal rating. RESULTS The quality ratings were significantly lower when roots and bone were visible in the setups (P < .0001). Buccolingual inclination and periodontal concerns were selected significantly more often as reasons for a less-than-ideal rating when roots and bone were shown, whereas occlusal relationship, overjet, occlusal contacts, and arch form were selected significantly more often as reasons for a less-than-ideal rating when roots and bone were not shown. The odds of selecting periodontal concerns as a reason for a less-than-ideal setup rating were 331 times greater when roots and bones were visible than when they were not. CONCLUSIONS Additional diagnostic information derived from CBCT scans affects orthodontists' perceptions of the overall case quality, which may influence their treatment-planning decisions.
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95
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Kong WD, Ke JY, Hu XQ, Zhang W, Li SS, Feng Y. Applications of cone-beam computed tomography to assess the effects of labial crown morphologies and collum angles on torque for maxillary anterior teeth. Am J Orthod Dentofacial Orthop 2016; 150:789-795. [DOI: 10.1016/j.ajodo.2016.03.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 03/01/2016] [Accepted: 03/01/2016] [Indexed: 10/20/2022]
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96
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Paula LKD, Solon-de-Mello PDA, Mattos CT, Ruellas ACDO, Sant'Anna EF. Influence of magnification and superimposition of structures on cephalometric diagnosis. Dental Press J Orthod 2016; 20:29-34. [PMID: 25992984 PMCID: PMC4445222 DOI: 10.1590/2176-9451.20.2.029-034.oar] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 01/19/2014] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE The purpose of this study was to assess the influence of magnification and superimposition of structures on CBCT-generated lateral cephalometric radiographs (LCR) using different segments of the cranium. METHODS CBCT scans of 10 patients were selected. Four LCR were generated using Dolphin Imaging(r) software: full-face, right side, left side and center of the head. A total of 40 images were imported into Radiocef Studio 2(r), and the angles of the most common cephalometric analyses were traced by the same observer twice and within a 10-day interval. Statistical analyses included intraexaminer agreement and comparison between methods by means of intraclass correlation coefficient (ICC) and Bland-Altman agreement tests. RESULTS Intraexaminer agreement of the angles assessed by ICC was excellent (> 0.90) for 83% of measurements, good (between 0.75 and 0.90) for 15%, and moderate (between 0.50 and 0.75) for 2% of measurements. The comparison between methods by ICC was excellent for 68% of measurements, good for 26%, and moderate for 6%. Variables presenting wider confidence intervals (> 6o) in the Bland-Altman tests, in intraexaminer assessment, were: mandibular incisor angle, maxillary incisor angle, and occlusal plane angle. And in comparison methods the variables with wider confidence interval were: mandibular incisor, maxillary incisor, GoGn, occlusal plane angle, Frankfort horizontal plane (FHP), and CoA. CONCLUSION Superimposition of structures seemed to influence the results more than magnification, and neither one of them significantly influenced the measurements. Considerable individual variability may occur, especially for mandibular and maxillary incisors, FHP and occlusal plane.
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Affiliation(s)
| | | | - Claudia Trindade Mattos
- Department of Orthodontics, Universidade Federal Fluminense, Rio de Janeiro, Rio de Janeiro, Brazil
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97
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Fernández-Pérez MJ, Alarcón JA, McNamara JA, Velasco-Torres M, Benavides E, Galindo-Moreno P, Catena A. Spheno-Occipital Synchondrosis Fusion Correlates with Cervical Vertebrae Maturation. PLoS One 2016; 11:e0161104. [PMID: 27513752 PMCID: PMC4981417 DOI: 10.1371/journal.pone.0161104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 07/30/2016] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to determine the relationship between the closure stage of the spheno-occipital synchondrosis and the maturational stage of the cervical vertebrae (CVM) in growing and young adult subjects using cone beam computed tomography (CBCT). CBCT images with an extended field of view obtained from 315 participants (148 females and 167 males; mean age 15.6 ±7.3 years; range 6 to 23 years) were analyzed. The fusion status of the synchondrosis was determined using a five-stage scoring system; the vertebral maturational status was evaluated using a six-stage stratification (CVM method). Ordinal regression was used to study the ability of the synchondrosis stage to predict the vertebral maturation stage. Vertebrae and synchondrosis had a strong significant correlation (r = 0.89) that essential was similar for females (r = 0.88) and males (r = 0.89). CVM stage could be accurately predicted from synchondrosis stage by ordinal regression models. Prediction equations of the vertebral stage using synchondrosis stage, sex and biological age as predictors were developed. Thus this investigation demonstrated that the stage of spheno-occipital synchondrosis, as determined in CBCT images, is a reasonable indicator of growth maturation.
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Affiliation(s)
| | - José Antonio Alarcón
- Department of Orthodontics, School of Dentistry, University of Granada, Granada, Spain
- * E-mail:
| | - James A. McNamara
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, The University of Michigan, Ann Arbor, Michigan, United States of America
| | - Miguel Velasco-Torres
- Department of Oral Surgery and Implant Dentistry, School of Dentistry, University of Granada, Granada, Spain
| | - Erika Benavides
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Pablo Galindo-Moreno
- Department of Oral Surgery and Implant Dentistry, School of Dentistry, University of Granada, Granada, Spain
| | - Andrés Catena
- Mind, Brain, and Behavior Research Center, University of Granada, Granada, Spain
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98
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Rhoden FK, Maltagliati LÁ, de Castro Ferreira Conti AC, Almeida-Pedrin RR, Filho LC, de Almeida Cardoso M. Cone Beam Computed Tomography-based Evaluation of the Anterior Teeth Position Changes obtained by Passive Self-ligating Brackets. J Contemp Dent Pract 2016; 17:623-629. [PMID: 27659077 DOI: 10.5005/jp-journals-10024-1901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
AIM The objective of this study was to evaluate the anterior teeth position changes obtained by passive self-ligating brackets using cone beam computed tomography (CBCT). MATERIALS AND METHODS Twenty patients with a mean age of 16.5 years, class I malocclusion, constricted maxillary arch, and teeth crowding above 5 mm were enrolled in this study, and treated by passive orthodontic self-ligating brackets. A sequence of stainless steel thermoset wire was implemented with ending wire of 0.019" × 0.025". The CBCT and dental casts were obtained prior to the installation of orthodontic appliances (T1), and 30 days after rectangular steel wire 0.019" × 0.025" installation (T2). The measurements in CBCT were performed with the Anatomage software, and the dental casts were evaluated with a digital caliper rule with an accuracy of 0.01 mm. RESULTS The CBCT data demonstrated mean buccal inclination of the upper and lower central incisors ranging from 6.55° to 7.24° respectively. The upper and lower lateral incisors ranged from 4.90° to 8.72° respectively. The lower canines showed an average increase of 3.88° in the buccal inclination and 1.96 mm in the transverse intercuspal distance. The upper canines showed a negative inclination with mean average of -0.36°, and an average increase of 0.82 mm in the transverse distance, with negative correlation with the initial crowding. CONCLUSION Treatment with passive self-ligating brackets without obtaining spaces increases buccal inclination of the upper and lower incisors with no correlation with the amount of initial teeth crowding. The intercanine distance tends to a small increase showing different inclinations between the arches. CLINICAL SIGNIFICANCE When taking into account the self-ligating brackets, the amount of initial dental crowding is not a limitation factor that could increase the buccal inclination of the anterior teeth.
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Affiliation(s)
- Fernando K Rhoden
- Department of Orthodontics, Sagrado Coracao University Bauru, São Paulo, Brazil
| | | | - Ana C de Castro Ferreira Conti
- Assistant Professor, Department of Orthodontics, Sagrado Coração University Bauru, São Paulo, Brazil, Phone: +551432235217, e-mail:
| | | | - Leopoldino C Filho
- Department of Orthodontics, Sagrado Coracao University Bauru, São Paulo, Brazil
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Khumsarn N, Patanaporn V, Janhom A, Jotikasthira D. Comparison of interradicular distances and cortical bone thickness in Thai patients with Class I and Class II skeletal patterns using cone-beam computed tomography. Imaging Sci Dent 2016; 46:117-25. [PMID: 27358819 PMCID: PMC4925648 DOI: 10.5624/isd.2016.46.2.117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 03/18/2016] [Accepted: 04/02/2016] [Indexed: 11/18/2022] Open
Abstract
Purpose This study evaluated and compared interradicular distances and cortical bone thickness in Thai patients with Class I and Class II skeletal patterns, using cone-beam computed tomography (CBCT). Materials and Methods Pretreatment CBCT images of 24 Thai orthodontic patients with Class I and Class II skeletal patterns were included in the study. Three measurements were chosen for investigation: the mesiodistal distance between the roots, the width of the buccolingual alveolar process, and buccal cortical bone thickness. All distances were recorded at five different levels from the cementoenamel junction (CEJ). Descriptive statistical analysis and t-tests were performed, with the significance level for all tests set at p<0.05. Results Patients with a Class II skeletal pattern showed significantly greater maxillary mesiodistal distances (between the first and second premolars) and widths of the buccolingual alveolar process (between the first and second molars) than Class I skeletal pattern patients at 10 mm above the CEJ. The maxillary buccal cortical bone thicknesses between the second premolar and first molar at 8 mm above the CEJ in Class II patients were likewise significantly greater than in Class I patients. Patients with a Class I skeletal pattern showed significantly wider mandibular buccolingual alveolar processes than did Class II patients (between the first and second molars) at 4, 6, and 8 mm below the CEJ. Conclusion In both the maxilla and mandible, the mesiodistal distances, the width of the buccolingual alveolar process, and buccal cortical bone thickness tended to increase from the CEJ to the apex in both Class I and Class II skeletal patterns.
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Affiliation(s)
| | - Virush Patanaporn
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Apirum Janhom
- Division of Oral and Maxillofacial Radiology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Dhirawat Jotikasthira
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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Cervical Vertebral Body's Volume as a New Parameter for Predicting the Skeletal Maturation Stages. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8696735. [PMID: 27340668 PMCID: PMC4909925 DOI: 10.1155/2016/8696735] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/27/2016] [Accepted: 05/10/2016] [Indexed: 11/23/2022]
Abstract
This study aimed to determine the correlation between the volumetric parameters derived from the images of the second, third, and fourth cervical vertebrae by using cone beam computed tomography with skeletal maturation stages and to propose a new formula for predicting skeletal maturation by using regression analysis. We obtained the estimation of skeletal maturation levels from hand-wrist radiographs and volume parameters derived from the second, third, and fourth cervical vertebrae bodies from 102 Japanese patients (54 women and 48 men, 5–18 years of age). We performed Pearson's correlation coefficient analysis and simple regression analysis. All volume parameters derived from the second, third, and fourth cervical vertebrae exhibited statistically significant correlations (P < 0.05). The simple regression model with the greatest R-square indicated the fourth-cervical-vertebra volume as an independent variable with a variance inflation factor less than ten. The explanation power was 81.76%. Volumetric parameters of cervical vertebrae using cone beam computed tomography are useful in regression models. The derived regression model has the potential for clinical application as it enables a simple and quantitative analysis to evaluate skeletal maturation level.
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