CBCT Imaging Advantages And Disadvantages

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The application of advances in recently developed technologies in the field of dentistry is very interesting and useful to observe. The invent of CBCT imaging is very useful as a advance and preferred procedure for planning comprehensive orthodontic treatment . The CBCT imaging provides various substantial advantages. CBCT imaging provides accuracy while measuring and doing analysis, also improves identification of sites of impacted teeth, helps in visualisation of any airway abnormalities , CBCT imaging helps in identifing and quantifing asymmetries, also can be usefull to evaluate periodontal structures, to identify any endodontic complications , planning various sites for placing temporary anchorage skeletal devices/implants and…show more content…
Sukovic et al(2001) stated that CBCT can scan the entire craniofacial region . Technology involved in CBCT imaging involves the use of a cone shaped xray beam which is directes through the patient craniofacial region and the remnant xray radiation is captured on a two-dimensional (2D) detector (Fig. 1) (Scarfe et al., 2006). The xray source and detector revolve about a patient’s head and generates two-dimensional (2D) images which is converted into a 3D images using computer software. The movement of the digital detector and Xray tube through 180°, or more frequently through 360°, generates immediate and accurate 2-D and 3-D CBCT imaging of various anatomical structure. Further these 2-D and 3-D CBCT images are restricted by the systems unique or designated, field-of-view…show more content…
It was sanctioned by the Food and Drug Administration (FDA) and is presently in its fourth generation as the NewTom VG. Subsequently, several other systems have been sanctioned or are in development. These systems can be broadly classified into three groups: (1) CBCT systems capable of imaging a large portion of the maxillofacial and cranial complex with one exposure (large FOV); (2) dedicated CBCT systems with a smaller FOV; and (3) hybrid digital panoramic/CBCT systems which have separate mechanisms for the two functions. Some of the latter systems also provide a 2D digital cephalogram option. 4.Radiation exposure of CBCT Many studies have described the radiation exposure associated with CBCT scans. In 2003, Mah et al. reported only a 20% reduction in the total radiation dose associated with cone beam CT compared with conventional CT. However, Schulze et al. (2004) subsequently reported that 3D volumetric images obtained with cone beam technology involved up to four times less radiation than conventional CT. Settings such as peak kilovoltage (kVp) and milliampere (mA) are some of the factors which affect the effective radiation dose. The use of lower mAs and/or
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