顎関節症の臨床統計的観察

DOI 被引用文献11件 参考文献11件

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  • Clinico-statistic alobservation of TMJ arthrosis

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Two hundred patients with arthrosis of the TMJ were classified into type I-IV based on the criteria proposed by Japanese Society for TMJ (1987) and analysed statistically. The results were as follows.<br>(1) 12 cases (6%) were classified into type I, 20 (10%) into type II, 52 (26%) into type III, 116 (58%) into type IV. Tost cases were included in type IV. Lateral tomography was available for the evaluation of the deformity of the condyle. It was the most important factor for the criteria of the classification.<br>(2) There were 51 males and 149 females. The females were dominant. The age distribution had two peaks in the 2nd and 3rd decades and the 5th decade.<br>(3) The region of disorders: 88 cases in the left side, 81 cases in the right side, 31 cases in both sides. No differences were seen between the sides.<br>(4) The relation between the disorders and teeth observation: Crowdings and other discrepancies in frontal teeth seemed to have a special relation with type III, and type IV.<br>(5) The treatment term of each type: Generally, type III cases had a tendensy to have a long treatment term. When different cases were treatedin the same way, type IV cases seemed to have the longest term for success. In the cases of anterior disc displacement with reduction, the treatment term of the cases with less deformity of the condyle were shorter than that of the cases with severe deformity. In the cases of the anterior disc displacement without reduction, the treatment term of cases that were effective with manipulation technique were shorter. The treatment term of the cases treated successgully with two or three methods was long.

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