顎関節症における下顎運動に関する臨床的研究
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The temporomandibular joint (TMJ) syndrome is one of odd syndrome for us dentists and their auxiliaries. Many departments of the dental science have been making different approaches in the study of its pain and dysfunction but a number of problems are veiled in a mist. For the present paper, an investigation of the mandibular movement by Stuart Pantograph and its quantitative analysis were made for the etiology, diagnosis and pre- and post-treatment function of the TMJ syndrome. The results were as follows : I. The comparison of the mandibular movement between the normal control and the TMJ patients 1. Anterior Horizontal Plane (AHP) The distance of the mandibular direction was significantly higher than the control. The PCNW area (affected side) was 10.83±3.94mm^2 and higher than the control. 2. Posterior Vertical Plane (PVP) The classification of the Fisher's angle between the TMJ patients and the control were quite different. The unilateral patients had the negative Fisher's angle (42.1% of affected side) and its classification of the protrusive path indicated the D type (irregular type). 3. Posterior Horizontal Plane (PHP) The B type (immediate side shift) was greater in the classification of the side shift and occurred in 29.8% of the unilateral patients (affected side). The Bennett's angle showed no difference between the TMJ patients and the control. The A type (straight type) of the classification of the working path was less in number in the TMJ patients. 4. Curve Variation Index (CVI) The CVI of the TMJ patients was high and lacked smoothness in all the tracings. II. The comparison of the mandibular movement between pre- and post-treatment 1. Effective group All the results of the check items except for the PCNW area (unaffected side) in the TMJ patients approached the mean of the control especially on the unaffected side. 2. Ineffective group The distance of the mandibular direction and the CVI on the affected side and the classification of the side shift and the CVI on the unaffected side still kept the high level than the control. The distance of the mandibular direction (unaffected side) and the PCNW area showed relatively high level than the pre-treatment data. 3. In order to indicate objectively effect of treatment, a new criterion was established and was named the Mandibular Movement Improvement Index (MMII). The investigation of the mandibular movement by Stuart Pantograph is very significant for diagnosis and treatment of the TMJ syndrome.
- 九州歯科学会の論文
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