While hospitals and private clinics tend to use CBCT because of availability, a conventional cephalogram is still often considered the gold standard for diagnosis. 4–6 In addition, compared with CT, CBCT has a smaller volume, lower cost and lower radiation exposure and can provide the 3D information needed in clinical practice. ![]() CBCT can provide 3D images of the teeth and facial bones and only requires a short scanning time. 3Ĭone-beam computed tomography (CBCT) is a 3D imaging technology that has been developed in recent years. Computed tomography (CT) was originally used to obtain 3D images but due to the expense, high radiation dosage and the low resolution of CT, its application has been limited in orthodontic practice. Three-dimensional (3D) imaging can overcome the inherent problems of two-dimensional (2D) imaging and provide more detailed information to ensure accurate diagnosis to enable satisfactory clinical results. ![]() 1 However, traditional X-ray images of the craniofacial complex have inherent deficiencies, including superposition, distortion, and magnification 2 which can compromise diagnostic accuracy. ![]() Soft and hard tissue of craniofacial anatomy was evaluated by measuring X-ray images of the skull, thereby achieving more accurate diagnosis compared with those based on facial anatomy alone. Radiographic cephalometry was first proposed by Broadbent and Hofrath in 1931.
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