Abstract #1449

Analysis of the relationship between mandibular joint motion trajectory and masticatory muscle properties (volume, shape, T1&T2 value) with MR dynamic imaging

Ryusuke Nakai^1,2, Takashi Azuma³, Toshihiro Togaya⁴, and Hiroo Iwata²

¹Kokoro Research Center, Kyoto University, Kyoto, Japan, ²Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan, ³The Graduate School of Engineering, Kyoto University, Kyoto, Japan, ⁴Osaka Dental University, Osaka, Japan

For the diagnosis of temporomandibular joint disease, it is important to analyze with complete accuracy the range of mandibular motion and the tissue properties of the masticatory muscle in individual patients. In this study, we explored the parameters for accurate imaging of the mandibular motion trajectory using MR dynamic imaging, and then analyzed the relationship between the range of mandibular motion and the tissue properties of the masticatory muscle. As a result, we successfully identified the optimal imaging parameters and clarified that the range of side-to-side motion of the mandibular joint correlated with the tissue properties of the masticatory muscle.

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