顎関節内障における全身姿勢の分析

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  • Analysis of Body Posture of Patients with Internal Derangements of the Temporomandibular Joint.

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Many patients with temporomandibular joint (TMJ) disorders complain of various symptoms such as headache, shoulder stiffness, dizziness, tinnitus or other symptoms in addition to the three main TMJ symptoms (pain in the TMJ and masticatory muscles, limited mouth opening and TMJ noises). It has been shown that the side in which the patients complainof such accompanying symptoms most frequently coincides with that of the TMJ symptoms, and that the accompanying symptoms are often improved in parellel with the improvement of TMJ symptoms. These clinical findings suggest that the accompanying symptoms can be caused bythe same mechanisms as TMJ symptoms. However, the studies regarding the relationship between stomatognathic dysfunction and body condition are extremely limited.<BR>The purpose of this study was to investigate the relationship between TMJ dysfunction and body posture. In this study, 20 subjects with unilateral disk displacement of the TMJand 20 subjects without TMJ disorder were examined. All of the two groups were ordered to relaxand stand upright in front of a video camera. We registered theirwhole body postures andmeasured 10 and 6 angles from frontal and lateral views, respectively, by use of an image analysing computer system. Comparison of the angles between the two groups was made.<BR>In the result, we could point out several characteristic body postures of subjects with disk displacement.<BR>In the frontal view, an upper midpoint of the body (a midpoint of the lateral malleoli, the anterior superior iliac spines, the jugular incisure and the glabella) of subjects with disk displacement tended to deviate to the TMJ symptom side in comparison with a lower midpoint, and all the lines connecting between both eyes, bothtragi, both mouth angles, both mandibular angles, both acromions and both anterior superior iliac spines tended to rise to the TMJ symptoms side. The chin tended to shift to the TMJ symptom side.<BR>In the lateral view, no statistical differences of body postures between normalsubjects and subjects with disk displacement were observed.<BR>These results might indicate that the change of body postures plays some roles to cause ‘other’ symptoms accompanying TMJ disorders.

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