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E Honda, M Ida, T Sasaki, E Nishizawa, K Kino, Arthrotomographic sign of a 'double line' as an indicator of disc folding and sideways disc displacement in the temporomandibular joint., Dentomaxillofacial Radiology, Volume 25, Issue 1, 1 January 1996, Pages 55–58, https://doi.org/10.1259/dmfr.25.1.9084288
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Abstract
Dual-space, single-contrast arthrotomolgraphy of the TMJ was performed on a 19-year-old woman with a history of pain and clicking. Simultaneous multi-layer arthrotomography with computed radiography was used for the present examination. Anterior disc displacement with reduction was observed in the sagittal plane, together with a double line in the lower joint space. The double line was interpreted as disc folding and sideways disc displacement and was confirmed in the coronal plane.