ProjeÃÃes do cÃndilo mandibular em radiografias transcraniana e panorÃmica e em tomografia convencional corrigida

AUTOR(ES)

Joanna Martins Novais Barbosa

DATA DE PUBLICAÇÃO

2008

RESUMO

The aim of the present study was to evaluate the radiographic appearance of the mandibular condyle in transcranial radiograph, panoramic radiograph and in corrected conventional tomography, and to verify the influence of the horizontal angulation and length of the condyle in its projection. The sample consisted of 17 dry human skulls. Distinct metallic markers were placed, on the lateral, intermediate and medial portions and on the lateral and medial poles of each condyle. Transcranial and panoramic radiographs, as well as a corrected conventional tomography were made of each skull with its mandible. Horizontal condylar angulation and length were obtained through a submento-vertex radiograph. The position of the markers was measured and compared with the position of the visible images of the condyles. Important differences were observed between the image of the markers and the image of the condyle in both directions: horizontal and vertical. The condylar length did not demonstrate any correlation with the radiographic projection of the condyle. However in regard to the horizontal angulation, for the transcranial radiograph, its influence was observed in the projection of the lateral and medial portions of the condyle, and for the panoramic radiograph, merely in the lateral portion. Transcranial and panoramic radiographs are not suitable for a precise evaluation of the condyle, they have limited value in the diagnosis of bone alterations in the condyle, and hence the corrected tomography is a more appropriate exam for this purpose

ASSUNTO(S)

mandibular condyle transcranial radiograph corrected conventional tomography cÃndilo mandibular tomografia convencional corrigida panoramic radiograph radiografia transcraniana radiologia medica radiografia panorÃmica

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