Orwig D S, Helms C A, Doyle G W
J Craniomandib Disord. 1989 Summer;3(3):138-42.
Optimal mouth positioning for magnetic resonance imaging of the TMJ is controversial. This study evaluates the closed mouth position and partial-open mouth position for diagnostic accuracy of anterior displacement of the disk. Sixty-two joints were considered abnormal in at least one position. In the positive joints, the closed mouth position sequences were all abnormal and diagnostic, while 34% of partial-open mouth position sequences were falsely normal. It was found that the closed mouth position provides higher diagnostic accuracy for disk displacement, although optimal examinations include imaging in both positions.
颞下颌关节磁共振成像的最佳口腔位置存在争议。本研究评估了闭口位和半开口位对盘状软骨前移位诊断准确性的影响。62个关节在至少一个位置被认为异常。在阳性关节中，闭口位序列均异常且具有诊断意义，而34%的半开口位序列为假正常。研究发现，闭口位对盘状软骨移位具有更高的诊断准确性，尽管最佳检查包括两个位置的成像。
