Diagnostic possibilities of cone-beam computed tomography in the facial skeleton

Schulze, Dirk; Heiland, Max; Schmelzle, R.; Rother, U

doi:10.1016/j.ics.2004.03.286

Cited by 16 publications

(17 citation statements)

References 5 publications

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“…the use of lower mA and/or collimation are some of the ways to reduce the amount of radiation, but at the same time the image quality may suffer. the doses from cBct are significantly lower than conventional CT, yet are higher than doses from the traditional views used in dentistry (28,29,45,46). exposure dose from a cBct machine has been reported to be as low as 45 μSv (micro-sievert, SI unit for ionizing radiation) to as high as 650 μSv (28).…”

Section: Fig 2 Distribution Of Supernumerary Teeth By Gender and Lmentioning

confidence: 99%

The Detailed Evaluation of Supernumerary Teeth with the Aid of Cone Beam Computed Tomography

Tümen

Yavuz

Tumen

et al. 2010

Biotechnology & Biotechnological Equipment

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Section: Fig 2 Distribution Of Supernumerary Teeth By Gender and Lmentioning

confidence: 99%

The Detailed Evaluation of Supernumerary Teeth with the Aid of Cone Beam Computed Tomography

Tümen

Yavuz

Tumen

et al. 2010

Biotechnology & Biotechnological Equipment

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“…While CBCT has the capability of producing 3D images with significantly less radiation than conventional CT, settings of the device plays a key role in the resulting radiation dose. The setting parameters include kilovoltage peak (kVp) and milliamperage (mA) (6,7).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have shown that both the lower and the higher exposure settings in medical CT units result in acceptable image quality (6)(7)(8)(9)(10). Although conventional dental imaging modalities still deliver lower radiation doses to patients, for some special cases in orthodontic treatment planning, undoubtedly a CBCT is preferred over a CT image (8).…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect mA Variation on Absorbed Dose to Salivary Glands and Mandible Body in CBCT

et al. 2018

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Background: Cone beam computed tomography (CBCT) has been broadly acceptable in recent years as a radiography modality for diagnosis, treatment planning and follow up in dentistry. Some important parameters such as radiation dose, image quality and field of view are considered as a criteria for deciding whether or not a CBCT dental unit is suitable for a particular application.Objectives: This study aims to evaluate the effect of exposure levels on the absorbed dose of mandible and salivary glands according to various settings of milliamperage (mA) in CBCT. Materials and Methods:A very advanced multilayers head and neck phantom was constructed for this study. This phantom was built based on the CT images of a specific patient with an average size. This phantom was constructed using proper substitutes for soft tissue and bone according to their physical properties. Therefore, there was a high level of agreement with the patient's body. This phantom enables us to measure the absorbed dose inside the organs. Dosimetry has been performed by Soredex Cranex3d CBCT. For film dosimetry, AGFA films were used in various layers of the phantom. The mAs of the device was changed in the range of 2, 4, 6, 8, 10 and 12 mA. Results:The maximum and the minimum absorbed dose was placed in the area related to the right mandible and the left submandibular gland. The increase of absorbed dose by mA increase was meaningful in the confidence level of 95% for all scanned areas. By changing mA from 2 to 12, the absorbed dose varied significantly with a maximum 5.44-fold variation between the highest and lowest dose for the parotid gland. Conclusion:This study has shown that there is a meaningful relationship between the increase of mA and increase of absorbed dose in different parts of the dentomaxillofacial area, including the mandible, submandibular and parotid glands. It is concluded that as long as the image quality is acceptable for diagnostic purposes, the mAs of the CBCT should be kept in a low range to minimize the absorbed dose.

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“…21,26,27 Computed tomography (CT) allows the reconstruction and visualization of anatomical areas in three dimensions, revealing information about size, shape and texture and has become an important tool for all areas of dentistry, providing reliable linear 15,18,20,23 and angular 22,23 measurements. A method for evaluating torques and angulations by means of computed tomography has been described, 10 which faithfully depicts dental structures and allows professionals to measure each individual tooth, in addition to facilitating the study of dental positioning 15 and inclinations, instrumental in the diagnosis, prognosis and analysis of finished orthodontic cases.…”

Section: Introductionmentioning

confidence: 99%

Avaliação da inclinação dentária no tratamento compensatório do padrão II com tomografia computadorizada

Fattori¹,

Brangeli²,

Filho

2010

Dental Press J. Orthod.

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Objective: To evaluate changes in the inclination of anterior teeth caused by orthodontic treatment using a Straight-Wire appliance (Capelozza's prescription II), before and after the leveling phase with rectangular stainless steel archwires. Methods: Seventeen adult subjects were selected who presented with facial pattern II, Class II malocclusion, referred for compensatory orthodontic treatment. Inclinations of anterior teeth were clinically assessed using CT scans at three different times, i.e., after the use of 0.020-in (T1), 0.019 X 0.025-in (T2) and 0.021 X 0.025-in (T3) archwires. Friedman's analysis of variance was applied with 5% significance level to compare the three assessments (T1, T2 and T3). Results: It was noted that the rectangular wires were unable to produce any significant changes in inclination medians, except for a slight change in mandibular lateral incisors (p<0.05). On the other hand, variations in inclination were smaller when 0.021 X 0.025-in archwires were employed, particularly in maxillary incisors (P<0.001). Conclusion: The use of rectangular 0.021 X 0.025-in archwires produces more homogeneous variations in the inclination of maxillary incisors, but no significant median changes. AbstractKeywords: Computed Tomography. Orthodontic treatment. Tooth inclination.

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Diagnostic possibilities of cone-beam computed tomography in the facial skeleton

Cited by 16 publications

References 5 publications

The Detailed Evaluation of Supernumerary Teeth with the Aid of Cone Beam Computed Tomography

The Detailed Evaluation of Supernumerary Teeth with the Aid of Cone Beam Computed Tomography

Investigating the Effect mA Variation on Absorbed Dose to Salivary Glands and Mandible Body in CBCT

Avaliação da inclinação dentária no tratamento compensatório do padrão II com tomografia computadorizada

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