Temporomandibular joint disc displacement: diagnosis by arthrography with dental volumetric computerized tomography / 中华口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>Temporomandibular joint sideways and rotational disc displacement was assessed by arthrography with dental volumetric computerized tomography.</p><p><b>METHODS</b>The study was conducted retrospectively on 119 joints of 109 patients (87 females, 22 males, mean age 31.1 years), who had undergone arthrography with dental volumetric CT in the sagittal and coronal planes. The disc displacements were subdivided into 5 types; condylar abnormalities were subdivided into 4 types.</p><p><b>RESULTS</b>Complete anterior disc displacement was the commonest (70.6%) and medial the rarest (0.8%); anterolateral and anteromedial displacements were 18.5% and 10.1% respectively. The types of disc displacements were not correlated with bone lesions. A higher prevalences of bone lesions were found in the lateral poles of condyles.</p><p><b>CONCLUSIONS</b>Arthrography using dental volume CT can be taken in the sagittal and coronal planes, so the sideways and rotational disc displacements, perforations and bone lesions can be evaluated. It's superior to conventional arthrography.</p>