• Title, Summary, Keyword: Cone-Beam Computed Tomography

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Fundamentals and Applications of Cone-Beam Computed Tomography(CBCT) (임상가를 위한 특집 1 - CBCT의 기본원리 및 적용)

  • Park, In-Woo
    • The Journal of the Korean dental association
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    • v.50 no.4
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    • pp.180-188
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    • 2012
  • Cone beam computed tomography(CBCT) machines recently developed in Korea, being designed for imaging hard tissues of the oral and maxillofacial region. I reported a brief overview of CBCT system, in comparison with coventional computed tomography(CT) system. CBCT provides high resolution, simpler image acquisition, lower dose and cost alternative to conventional CT, promising to revolutionize the practice of oral and maxillofacial radiology.

Detection of maxillary second molar with two palatal roots using cone beam computed tomography: a case report (두개의 구개측 치근을 갖는 상악 제2대구치에서 cone beam computed tomography 활용: 증례보고)

  • Kim, Jeong-Hee;Song, Byeongcheol
    • Journal of Dental Rehabilitation and Applied Science
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    • v.32 no.1
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    • pp.87-92
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    • 2016
  • The purpose of this clinical report was to show anatomical variations in permanent maxillary second molar using computed tomography (CT). This case report describes the application of CT to detect the unusual root anatomy of maxillary second molar with 2 separate palatal roots for successful endodontic treatment procedures. The use of cone beam computed tomography (CBCT) can overcome the limitation of the periapical standard radiography caused by the overlap of buccal and secondary palatal roots.

A rare case of dilated invaginated odontome with talon cusp in a permanent maxillary central incisor diagnosed by cone beam computed tomography

  • Jaya, Ranganathan;Kumar, Rangarajan Sundaresan Mohan;Srinivasan, Ramasamy
    • Imaging Science in Dentistry
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    • v.43 no.3
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    • pp.209-213
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    • 2013
  • It has been a challenge to establish the accurate diagnosis of developmental tooth anomalies based on periapical radiographs. Recently, three-dimensional imaging by cone beam computed tomography has provided useful information to investigate the complex anatomy of and establish the proper management for tooth anomalies. The most severe variant of dens invaginatus, known as dilated odontome, is a rare occurrence, and the cone beam computed tomographic findings of this anomaly have never been reported for an erupted permanent maxillary central incisor. The occurrence of talon cusp occurring along with dens invaginatus is also unusual. The aim of this report was to show the importance of cone beam computed tomography in contributing to the accurate diagnosis and evaluation of the complex anatomy of this rare anomaly.

Multiple intraosseous cervical pneumatocysts: A case report of a rare incidental finding on cone-beam computed tomography

  • Jadhav, Aniket B.;Sarah, Sangeetha Gajendran;Cederberg, Robert;Wagh, Aditya;Kiat-amnuay, Sudarat
    • Imaging Science in Dentistry
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    • v.48 no.3
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    • pp.223-226
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    • 2018
  • This report presents a case of cervical pneumatocysts as an incidental finding on cone-beam computed tomography. Pneumatocysts are gas-containing lesions of unknown etiology. They usually present in the ilium or sacrum, adjacent to the sacroiliac joint. In the literature, 21 case reports have described cervical pneumatocysts. Cervical pneumatocysts should be differentiated from other lesions, such as osteomyelitis, osteonecrosis, and neoplasms, as well as post-traumatic and post-surgical cases. Computed tomography, cone-beam computed tomography, and magnetic resonance imaging are appropriate tools to diagnose cervical pneumatocysts.

Cone beam computed tomography findings of ectopic mandibular third molar in the mandibular condyle: report of a case

  • Kim, Jin-Soo
    • Imaging Science in Dentistry
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    • v.41 no.3
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    • pp.135-137
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    • 2011
  • Impaction of third molar is a common developmental abnormality. However, ectopic impaction of the mandibular third molar in condylar region is an extremely rare condition. This report describes a case of impacted tooth in the mandibular condyle without any associated pathologic condition. Also, this report presents the spatial relationship of the impacted mandibular third molar to the surrounding anatomic structures using cone beam computed tomography.

Using cone-beam computed tomography in oral surgery and endodontics (외과학과 근관치료학 영역에서 콘빔형전산화단층영상 활용)

  • Kim, Gyu-Tae
    • The Journal of the Korean dental association
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    • v.48 no.10
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    • pp.729-737
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    • 2010
  • The use of cone-beam computed tomography(CBCT) image has been increased. Usually, the dentists use this images for the implant or orthodontic treatment. In this article, CBCT examples for oral surgery and endodontics are presented. CBCT is very useful when dentists extract teeth or provide endodontic treatment. The disadvantage of the CBCT image is also discussed simply. Clinicians could provide higher quality of medical care with CBCT.

Evaluation of imaging reformation with cone beam computed tomography for the assessment of bone density and shape in mandible (Cone beam형 전산화단층영상에서 골의 형태와 밀도의 평가)

  • Hong, Sang-Woo;Kim, Gyu-Tae;Choi, Yon-Suk;Hwang, Eui-Hwan
    • Imaging Science in Dentistry
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    • v.38 no.1
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    • pp.49-56
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    • 2008
  • Purpose: Diagnostic estimation of destruction and formation of bone has the typical limit according to capacity of x-ray generator and image detector. So the aim of this study was to find out how much it can reproduce the shape and the density of bone in the case of using recently developed dental type of cone beam computed tomography, and which image is applied by new detector and mathematic calculation. Materials and Methods: Cone beam computed tomography (PSR 9000N, Asahi Roentgen Ind. Co., Ltd., Japan) and soft x-ray radiography were executed on dry mandible that was already decalcified during 5 hours, 10 hours, 15 hours, 20 hours, and 25 hours. Estimating and comparing of those came to the following results. Results: The change of inferior border of mandible and anterior border of ramus in the region of cortical bone was observed between first 5 and 10 hours of decalcification. The reproduction of shape and density in the region of cortical bone and cancellous bone can be hardly observed at cone beam computed tomography compared with soft x-ray radiography. The difference of decrease of bone density according to hours of decalcification increase wasn't reproduced at cone beam computed tomography compared with soft x-ray radiography. Conclusion: CBCT images revealed higher spatial resolution. However, contrast resolution in region of low contrast sensitivity is the inferiority of images' property.

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The accuracy of the imaging reformation of cone beam computed tomography for the assessment of bone defect healing (골결손부 치유과정에서 cone beam형 전산화단층영상의 정확도)

  • Kang, Ho-Duk;Kim, Gyu-Tae;Choi, Yong-Suk;Hwang, Eui-Hwan
    • Imaging Science in Dentistry
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    • v.37 no.2
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    • pp.69-77
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    • 2007
  • Purpose: To evaluate the accuracy of the imaging reformation of cone beam computed tomography for the assessment of bone defect healing in rat model. Materials and Methods: Sprague-Dawley strain rats weighing about 350 gms were selected. Then critical size bone defects were done at parietal bone with implantation of collagen sponge. The rats were divided into seven groups of 3 days, 1 week, 2 weeks, 3 weeks, 4 weeks, 6 weeks, and 8 weeks. The healing of surgical defect was assessed by multi planar reconstruction (MPR) images and three-dimensional (3-D) images of cone beam computed tomography, compared with soft X-ray radiograph and histopathologic examination. Results: MPR images and 3-D images showed similar reformation of the healing amount at 3 days, 1 week, 2 weeks, and 8 weeks, however, lower reformation at 3 weeks, 4 weeks, and 6 weeks. According to imaging-based methodologies, MPR image revealed similar reformation of the healing amount than 3-D images compare with soft X-ray image. Among the four threshold values for 3-D images, 400-500 HU revealed similar reformation of the healing amount. Histopathologic examination confirmed the newly formed trabeculation correspond with imaging-based methologies. Conclusion: MPR images revealed higher accuracy of the imaging reformation of cone beam computed tomography and cone beam computed tomography is a clinically useful diagnostic tool for the assessment of bone defect healing.

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Basic principle of cone beam computed tomography (Cone beam형 전산화단층영상의 원리)

  • Choi Yong-Suk;Kim Gyu-Tae;Hwang Eui-Hwan
    • Imaging Science in Dentistry
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    • v.36 no.3
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    • pp.123-129
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    • 2006
  • The use of computed tomography for dental procedures has increased recently. Cone beam computed tomography (CBCT) systems have been designed for imaging hard tissues of the dentomaxillofacial region. CBCT is capable of providing high resolution in images of high diagnostic quality. This technology allows for 3-dimensional representation of the dentomaxillofacial skeleton with minimal distortion, but at lower equipment cost, simpler image acquisition and lower patient dose. Because this technology produces images with isotropic sub-millimeter spatial resolution, it is ideally suited for dedicated dentomaxillofacial imaging. In this paper, we provide a brief overview of cone beam scanning technology and compare it with the fan beam scanning used in conventional CT and the basic principles of currently available CBCT systems.

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Isolated tympanic plate fracture detected by cone-beam computed tomography: report of four cases with review of literature

  • Kalaskar, Ashita Ritesh;Kalaskar, Ritesh
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.43 no.5
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    • pp.356-360
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    • 2017
  • The tympanic plate is a small part of the temporal bone that separates the mandibular condyle from the external auditory canal. Fracture of this small plate is rare and usually associated with other bony fractures, mainly temporal and mandibular bone. There is a limited amount of literature on this subject, which increases the chance of cases being overlooked by physicians and radiologists. This is further supported by purely isolated cases of tympanic plate fracture without evidence of other bony fractures. Cone-beam computed tomography is an investigative three-dimensional imaging modality that can be used to detect fine structures and fractures in maxillofacial trauma. This article presents four cases of isolated tympanic plate fracture diagnosed by cone-beam computed tomography with no evidence of fracture involving other bones and review of the literature.