Comparison of conventional and cone beam CT synthesized cephalograms

Kumar, Vandana; Ludlow, John B.; Mol, André; Cevidanes, Lucia

doi:10.1259/dmfr/98032356

Cited by 193 publications

(195 citation statements)

References 32 publications

Supporting

Mentioning

143

Contrasting

Unclassified

Order By: Relevance

“…10 The CBCT images allow clinicians to evaluate the size of the alveolar bones without the disadvantages of conventional radiographs, as these images give accurate measurements as a result of the high clarity, with the possibility of extracting cephalogram images with accuracy and reliability. [11][12][13] Several studies in the orthodontic literature have focused on the relationship between the thickness of anterior alveolus and the labiolingual position of upper and lower incisors; the relationship between different skeletal jaw positions and anterior alveolar thickness has also been evaluated. 6,8,[14][15][16] In the study of Kim et al, vertical alveolar bone levels and alveolar bone thickness were compared between lower and upper incisors in surgical skeletal class III patients; they found that the amount of bone loss at the lower incisors was greater than that of the uppers, and lingual bone thickness was greater at the upper incisors and smaller at the opposing teeth.…”

Section: Jcdpmentioning

confidence: 99%

Evaluation of Bone Thickness and Density in the Lower Incisors’ Region in Adults with Different Types of Skeletal Malocclusion using Cone-beam Computed Tomography

Al-Masri¹,

Ajaj²,

Hajeer³

et al. 2015

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

Objectives: To evaluate the bone thickness and density in the lower incisors' region in orthodontically untreated adults, and to examine any possible relationship between thickness and density in different skeletal patterns using cone-beam computed tomography (CBCT). Materials and methods:The CBCT records of 48 patients were obtained from the archive of orthodontic department comprising three groups of malocclusion (class I, II and III) with 16 patients in each group. Using OnDemand 3D ® software, sagittal sections were made for each lower incisor. Thicknesses and densities were measured at three levels of the root (cervical, middle and apical regions) from the labial and lingual sides. Accuracy and reliability tests were undertaken to assess the intraobserver reliability and to detect systematic error. Pearson correlation coefficients were calculated and one-way analysis of variance (ANOVA) was employed to detect significant differences among the three groups of skeletal malocclusion.Results: Apical buccal thickness (ABT) in the four incisors was higher in class II and I patients than in class III patients (p < 0.05). There were significant differences between buccal and lingual surfaces at the apical and middle regions only in class II and III patients. Statistical differences were found between class I and II patients for the cervical buccal density (CBD) and between class II and III patients for apical buccal density (ABD). Relationship between bone thickness and density values ranged from strong at the cervical regions to weak at the apical regions. Conclusions:Sagittal skeletal patterns affect apical bone thickness and density at buccal surfaces of the four lower incisors'

show abstract

Section: Jcdpmentioning

confidence: 99%

Evaluation of Bone Thickness and Density in the Lower Incisors’ Region in Adults with Different Types of Skeletal Malocclusion using Cone-beam Computed Tomography

Al-Masri¹,

Ajaj²,

Hajeer³

et al. 2015

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

show abstract

“…To date, multiple ex vivo studies have attempted to establish the ability of CBCT images to accurately reproduce the geometric dimensions of the maxillodental structures and the mandible. [22][23][24][25] A relatively low patient dose for dedicated dentomaxillofacial scans is a potentially attractive feature of CBCT imaging. The dosing characteristics of dentomaxillofacial scanners were discussed in Part 1 of this series.…”

Section: Dentomaxillofacial Imagingmentioning

confidence: 99%

“…29,31,32 Several studies have described the 3D geometric accuracy of CBCT imaging in the maxillodental and mandibular regions as well. [22][23][24][25] Examples of CBCT imaging studies for implant planning and visualization of the mandibular canal are presented in Figures 1 and 2 respectively.…”

Section: Implantologymentioning

confidence: 99%

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Miracle¹,

Mukherji²

2009

AJNR Am J Neuroradiol

300

207

View full text Add to dashboard Cite

SUMMARY: Conebeam x-ray CT (CBCT) is being increasingly used for point-of-service head and neck and dentomaxillofacial imaging. This technique provides relatively high isotropic spatial resolution of osseous structures with a reduced radiation dose compared with conventional CT scans. In this second installment in a 2-part review, the clinical applications in the dentomaxillofacial and head and neck regions will be explored, with particular emphasis on diagnostic imaging of the sinuses, temporal bone, and craniofacial structures. Several controversies surrounding the emergence of CBCT technology will also be addressed. C onebeam CT (CBCT) is an advancement in CT imagingthat has begun to emerge as a potentially low-dose crosssectional technique for visualizing bony structures in the head and neck. The physical principles, image quality parameters, and technical limitations relevant to CBCT imaging were discussed in Part 1 of this 2-part series. The second part presented here will highlight the evidence related to CBCT applications in head and neck as well as dentomaxillofacial imaging. Controversial aspects of this technology will also be addressed, including limitations in image quality and its often officebased operational model.CBCT was first adapted for potential clinical use in 1982 at the Mayo Clinic Biodynamics Research Laboratory. 1 Initial interest focused primarily on applications in angiography in which soft-tissue resolution could be sacrificed in favor of high temporal and spatial-resolving capabilities. Since that time, several CBCT systems have been developed for use both in the interventional suite and for general applications in CT angiography. 2,3 Exploration of CBCT technologies for use in radiation therapy guidance began in 1992, 4,5 followed by integration of the first CBCT imaging system into the gantry of a linear accelerator in 1999. 6 The first CBCT system became commercially available for dentomaxillofacial imaging in 2001 (NewTom QR DVT 9000; Quantitative Radiology, Verona, Italy). Comparatively low dosing requirements and a relatively compact design have also led to intense interest in surgical planning and intraoperative CBCT applications, particularly in the head and neck but also in spinal, thoracic, abdominal, and orthopedic procedures. [7][8][9][10][11] Diagnostic applications in CT mammography and head and neck imaging are also under evaluation. 12-14 The technical and clinical considerations pertaining to CBCT imaging in many of these applications have been the subjects of several recent reviews. [15][16][17][18][19] The recent review by Dörfler et al 16 of the neurointerventional applications of CBCT is of particular interest to the field of neuroradiology.The discussion below will focus on the diagnostic and treatment-planning applications of CBCT in dentomaxillofacial and head and neck imaging. Commercially available CBCT systems for dentomaxillofacial imaging include the CB MercuRay and CB Throne (Hitachi Medical, Kashiwi-shi, Chiba-ken, Japan), 3D Accuitomo products (J. Mor...

show abstract

“…The advantages of CBCT over conventional CT or dental films include low radiation dose, lower cost, excellent tissue contrast, elimination of blurring and overlapping of adjacent teeth, and high spatial resolution. [14][15][16][17][18] The goal of this study was to evaluate the vertical alveolar bone levels and thickness around the maxillary and mandibular incisors of adult skeletal Class III patients by using 3-D CBCT images. The hypothesis of this study was that the bone loss is not different in the maxillary and mandibular incisors.…”

Section: Introductionmentioning

confidence: 99%

Alveolar Bone Loss around Incisors in Surgical Skeletal Class III Patients

Kim

Park

Kook

2009

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To test the hypothesis that there is no difference in the vertical alveolar bone levels and alveolar bone thickness around the maxillary and mandibular central incisors in surgically treated skeletal Class III malocclusion patients. Materials and Methods:The study sample comprised 20 Korean patients with skeletal Class III malocclusion with anterior crossbite and openbite (9 male, 11 female, mean ages 24.1). Threedimensional cone beam computed tomography images were taken at least 1 month before the orthognathic surgery, and sagittal slices chosen at the labio-lingually widest point of the maxillary and mandibular right central incisor were evaluated. Measurement of the amount of vertical alveolar bone levels and alveolar bone thickness of the labial and lingual plate at the root apex was made using the SimPlant Pro 12.0 program. Results:The mandibular incisors showed reduced vertical alveolar bone levels than the maxillary incisors, especially on the lingual side. The alveolar bone thickness was significantly greater on the lingual side in the maxillary incisors, whereas the mandibular incisors exhibited an opposite result (P Ͻ .05). The percentage of vertical bone loss to root length showed a statistically significant difference between the upper labial and lower labial alveolar bone and also between the upper lingual and lower lingual alveolar bone, showing more bone loss in the lower incisors (P Ͻ .001). Conclusions:The hypothesis is rejected. For the skeletal Class III patients undergoing orthognathic surgery, special care should be taken to prevent or not aggravate preexisting alveolar bone loss in the anterior teeth, especially in the mandible. (Angle Orthod. 2009;79:676-682.)

show abstract

Comparison of conventional and cone beam CT synthesized cephalograms

Abstract: CBCT can reproduce conventional cephalometric geometry with similar precision and accuracy. Orthogonal CBCT projections provided greater accuracy of measurement for midsagittal plane dimensions than perspective CBCT or conventional cephalometric images.

Cited by 193 publications

References 32 publications

Evaluation of Bone Thickness and Density in the Lower Incisors’ Region in Adults with Different Types of Skeletal Malocclusion using Cone-beam Computed Tomography

Evaluation of Bone Thickness and Density in the Lower Incisors’ Region in Adults with Different Types of Skeletal Malocclusion using Cone-beam Computed Tomography

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Alveolar Bone Loss around Incisors in Surgical Skeletal Class III Patients

Contact Info

Product

Resources

About