Dynamic responses in the human temporomandibular joint (mandibular fossa) during mandibular movements and changes of mandibular positions

概要

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To clarify the characteristics of dynamic responses of the mandibular fossa at the temporomandibular joint to mandibular movements, we performed mandibular movements in fresh human cadavers and measured strain by the tri-axial strain gauge method in the cerebral surface of the squamous part of the temporal bone constituting the upper wall of the mandibular fossa. The dynamic behavior of the temporomandibular joint was observed from the surface of the internal base of the skull. With changes in the route of mandibular movement and the mandibular position, bones in the upper wall of the mandibular fossa at the temporomandibular joint showed complicated changes in shape, In particular, the mandibular fossa sank in the direction of the external base of the skull with mouth opening but protruded in the direction of the internal base of the skull with mouth closing. These findings suggest that not only the articular disc but also bones constituting the temporomandibular joint buffer force applied to this area.
一般社団法人日本顎関節学会の論文