Article

Cone beam computed tomography (CBCT): understandind this new imaging diagnostic method with promissing application in Orthodontics

Revista Dental Press de Ortodontia e Ortopedia Facial 04/2007; 12(2):139-156. DOI: 10.1590/S1415-54192007000200018

ABSTRACT OBJECTIVES: This article aims to inform and update the dental professional regarding computed tomography (CT), including information related to image acquisition, radiation dose and CT interpretation, with distinction between the traditional CT and the cone beam CT. Additionally, the possibilities of application of CT in Orthodontics are discussed. CONCLUSION: As a result of technological advances, lower radiation dose and optimal image quality, the expectations point to a more wide utilization of cone beam computed tomography in Dentistry and Orthodontics. With the definition of new knowledge generated from the three-dimensional view of cranium and face, the future can bring changes in concepts and paradigms as well as the redefinition of orthodontic objectives and treatment plans.

0 Bookmarks
 · 
12 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: OBJECTIVES: The aim of this study was to analyze the variations in canal and root cross-sectional area in three-rooted maxillary premolars between high-resolution computed tomography (μCT) and cone beam computed tomography (CBCT). MATERIALS AND METHODS: Sixteen extracted maxillary premolars with three distinct roots and fully formed apices were scanned using μCT and CBCT. Photoshop CS software was used to measure root and canal cross-sectional areas at the most cervical and the most apical points of each root third in images obtained using the two tomographic computed (CT) techniques, and at 30 root sections equidistant from both root ends using μCT images. Canal and root areas were compared between each method using the Student t test for paired samples and 95 % confidence intervals. RESULTS: Images using μCT were sharper than those obtained using CBCT. There were statistically significant differences in mean area measurements of roots and canals between the μCT and CBCT techniques (P < 0.05). Root and canal areas had similar variations in cross-sectional μCT images and became proportionally smaller in a cervical to apical direction as the cementodentinal junction was approached, from where the area then increased apically. CONCLUSION: Although variation was similar in the roots and canals under study, CBCT produced poorer image details than μCT. CLINICAL RELEVANCE: Although CBCT is a strong diagnosis tool, it still needs improvement to provide accuracy in details of the root canal system, especially in cases with anatomical variations, such as the three-rooted maxillary premolars.
    Clinical Oral Investigations 09/2012; · 2.20 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The development of veterinary dentistry has substantially improved the ability to diagnose canine and feline dental abnormalities. Consequently, examinations previously performed only on humans are now available for small animals, thus improving the diagnostic quality. This has increased the need for technical qualification of veterinary professionals and increased technological investments. This study evaluated the use of cone beam computed tomography and intraoral radiography as complementary exams for diagnosing dental abnormalities in dogs and cats. Cone beam computed tomography was provided faster image acquisition with high image quality, was associated with low ionizing radiation levels, enabled image editing, and reduced the exam duration. Our results showed that radiography was an effective method for dental radiographic examination with low cost and fast execution times, and can be performed during surgical procedures.
    Journal of veterinary science (Suwŏn-si, Korea) 12/2011; 12(4):387-92. · 0.89 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: To determine the characteristics of facial soft tissues at rest and wide smile, and their possible relation to the facial type. We analyzed a sample of forty-eight young female adults, aged between 19.10 and 40 years old, with a mean age of 30.9 years, who had balanced profile and passive lip seal. Cone beam computed tomographies were performed at rest and wide smile postures on the entire sample which was divided into three groups according to individual facial types. Soft tissue features analysis of the lips, nose, zygoma and chin were done in sagittal, axial and frontal axis tomographic views. No differences were observed in any of the facial type variables for the static analysis of facial structures at both rest and wide smile postures. Dynamic analysis showed that brachifacial types are more sensitive to movement, presenting greater sagittal lip contraction. However, the lip movement produced by this type of face results in a narrow smile, with smaller tooth exposure area when compared with other facial types. Findings pointed out that the position of the upper lip should be ahead of the lower lip, and the latter, ahead of the pogonion. It was also found that the facial type does not impact the positioning of these structures. Additionally, the use of cone beam computed tomography may be a valuable method to study craniofacial features.
    Dental press journal of orthodontics. 12/2013; 18(6):38-44.

Full-text (2 Sources)

View
0 Downloads
Available from