Uso de imagem de tomografia computadorizada de feixe cônico na cefalometria

Abstract

The image acquisition system called cone beam computed tomography (CBCT) or cone beam brought to dentistry, particularly for cephalometry new features, including three-dimensionally to be done. The CBCT can generate three-dimensional image reconstruction and sagittal similar to a cephalometric radiograph. This new mode of obtaining image replaces the conventional computed tomography (CT) or fan beam, which for dentistry has been limited because CT is restricted to medical clinics and hospitals. Cephalometry is held on cephalograms is an aid for diagnosis and orthodontic planning. Summarizes the complex structures dentomaxillofacial within a geometric pattern in a two-dimensional image, and has limitations as an image overlay structures. Our objective in this work, through a literature review, update and discuss the employment of two-dimensional images and three-dimensional CT cephalometry and CBCT to produce in a traditional way or three - dimensionally, and compare their accuracies with cephalometries traditionally made on cephalograms. Cephalometry performed in 2D and 3D images of CBCT proved to be very precise. By the need to take CBCT cephalometry can be done in traditional two-dimensional images generated from CBCT, thereby avoiding unnecessary additional radiation to the patient. It is still necessary to establish clear standards and concepts for implementing the three-dimensional cephalometry, so that it can be routine in the orthodontic clinic, they still require further studies and training.