Relatioship between temporomanbular joint space and articular disk position / Relação entre o espaço articular da ATM e a posição do disco articular

AUTOR(ES)

Andrea Kuroiva Yanikian

DATA DE PUBLICAÇÃO

2009

RESUMO

Advanced imaging systems, as cone beam computed tomography (CBCT) and magnetic resonance imaging (MRI) have been used for the assessment of the temporomandibular joint (TMJ). Among the pathologies occurring in the TMJ, disk displacement (DD) is one of the most common observed. The aim of this study was to verify condylar position within the fossa in CBCT images and to investigate its relationship with disk position as depicted in MR images. Fifty two patients from FOUSP Orthodontic Clinic were submitted to bilateral MRI of the TMJ. One hundred CBCT images of the TMJ were obtained using a Newtom 3G. Secondary reconstructions were accomplished with Nemoscan software. Articular space measurements and condylar position were compared between groups which were classified according to disk position, for sagittal and coronal planes, considering the direction of DD. Data was evaluated by using ANOVA one way and Tukey test, Kruskall Wallis and Dunn tests (a=0,05) and Fisher exact test. Normal disk position was the most frequently observed, followed by DD localized in the lateral third of the joint. In the central sagittal slice, condylar position was mainly concentric. Posterior joint space in 2S group was lower than 3S and 4S groups. In the central coronal slice, medial space was higher for 1C group. The lateral space was higher for groups 2C and 3C than for the other groups. The superior space was lower for the 4C group. Medial space was higher than the lateral space for all groups, except for the TMJs with rotational anterolateral and lateral DD. It was concluded that disk position had influenced articular space measurements in the sagittal and coronal central slices of the TMJ´s CBCT. Other elements associated to the joint, such as attachments and masticator muscles, besides individual anatomical differences, should also be considered.

ASSUNTO(S)

temporomandibular joint articulação temporomandibular

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