Evaluation of simulated mandibular condyle bone using cone beam computed tomography / Avaliação de imagens de defeitos ósseos induzidos na cabeça da mandíbula por meio de tomografia computadorizada de feixe cônico

AUTOR(ES)
DATA DE PUBLICAÇÃO

2011

RESUMO

Cone beam computed tomography (CT) is recommended to assess TMJ bone morphology. The aim of the present study was to evaluate different acquisition protocols of cone beam CT for the evaluation of simulated mandibular condyle bone lesions. Thirty macerated condyle were used. Spherical lesions were created in different regions (medial, central and lateral) of the condyles surface, varying in size, which simulated bone changes in the TMJ. Condyles were submitted to cone beam computed tomography (Cone Beam i- Cat Imaging Sciences International, Hatfield, Pennsylvania, USA). The images were formatted and printed on film and subsequently evaluated by two examiners. The statistical tests used were the Kappa statistics and test validity (sensitivity and specificity). It was observed that when comparing the examiners with the gold standard, regardless of the area, the Kappa values observed for Protocol 2 (Kappa = 0.241, Kappa = 0.109) were higher than those for protocol 1 (Kappa = 0.221, Kappa = 0.058 ) for both examiners, but were not statistically different. When evaluating the individual regions, the highest agreement between both examiners was observed in the central region in protocol 1 (Kappa = 0.378 and kappa = 0.270) and protocol 2 (Kappa = 0.426 and 0.379). It can be concluded that both protocols evaluated proved to be reliable for the observation of defects in the condyle. However, protocol 2 can be recommended for further evaluation of bone defects, and very small defects, 0.9mm or smaller, were difficult to detect with this technique

ASSUNTO(S)

côndilo mandibular articulação temporomandibular diagnóstico por imagem anatomia mandibular condyle temporomandibular diagnostic imaging anatomy

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