顎関節の X 線学的研究 : 顎関節側斜位撮影法により得られた X 線像の分析

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タイトル別名
  • Radiographic Evaluation of the Temporomandibular Joint : Analysis of Radiographic Findings Obtained by the Transcranial Projection
  • ガクカンセツ ノ Xセンガクテキ ケンキュウ ガクカンセツガワ シャイ サツエ

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There are many patients complaining of disturbances in the region of the temporomandibular joint. To establish the etiology of temporomandibular joint dysfunction many fundamental and clinical studies have been made. In clinical examinations, the radiographic examination is valuable for evaluating morphology and pathology of the bony components of the temporomandibular joint. In this paper, to clarify the radiographic findings of temporomandibular joint dysfunction, a radiographic analysis was done on radiographs obtained from patients having complaints of the temporomandibular joint. Transcranial lateral oblique projections of the temporomandibular joint were performed on 266 patients with temporomandibular joint dysfunction at Kyushu Dental College Hospital from 1967 to 1976. The radiographs obtained were analyzed, and the results obtained are as follows : 1. Position of the condyle in the fossa with the patient's mouth closed : In both sexes, many condyles were located in the middle of the fossa. When the condyles were not located in the middle, they were located in the posterior region rather than in the anterior region of the fossa. 2. Position of the condyle in the fossa with the patient's mouth open : Female patients' condyles were more remained in the fossa more than male's. 3. Cortical bone of the condyle : In both sexes, many condyles showed a continuity of the cortical bone. Abnormalities of the cortical bone appeared as a break or disappearance of all of the cortical bone. 4. Cortical bone of the fossa : Female's fossae showed more continuity of the cortical bone than male's. Abnormalities showed as breaks or disappearance of the posterior region of the fossa, especially in male. Breaks or disappearance of all of the cortical bone was seen more in the left fossa than in the right one, especially in female. 5. Osteosclerosis or osteoporosis of the condyle : Osteosclerosis was seen equally in the both sexes but was more frequent in the left condyle than in the right one, especially in female. Osteoporosis was not seen often in the condyle. 6. Osteosclerosis or osteoporosis of the fossa : Osteosclerosis was more frequent in female and was more frequently seen in the left fossa than in the right one. Osteoporosis was not seen in the fossa. 7. Relation of condyle position and pathosis of it's cortical bone with the patient's mouth closed : There was no relation of condyle position and pathosis of it's cortical bone. 8. Relation of condyle position and pathosis of cortical bone of the fossa with the patient's mouth closed : There was no relation between the condyle position and pathosis of the cortical bone of the fossa. However, it seemed that if the condyle was located in the posterior region of the fossa, the cortical bone of the fossa sometimes showed abnormality. 9. Of the 266 cases, 15 cases (6%) were diagnosed as osseous ankylosis radiologically.

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