男女下顎窩の X 線学的形態の比較 : 主論文の要旨

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書誌事項

タイトル別名
  • Comparison between the Roentgenologic Morphology of the Male's and Female's Mandibular Fossa
  • 男女下顎窩のX線学的形態の比較
  • ダンジョ カガク カ ノ Xセンガクテキ ケイタイ ノ ヒカク

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抄録

Temporomandibular joint dysfunction has increasingly been treated in the province of the dental medicine. To establish the etiology of temporomandibular joint dysfunction, many fundamental and clinical studies have been undertaken. In the field of dental radiology, also, some investigations have been made on the temporomandibular joint from the radiological view points but suffered from the lack of appropriate means to analyze the morphology of the mandibular fossa. In 1976, Ohba et al. attempted to express the morphology of the mandibular fossa as a single function using Fourier Progression. In 1977, Kashiwagi actually used Fourier Progression to express the shape of the female's mandibular fossa revealed by lateral oblique radiograph. In this paper, the morphology of the male's mandibular fossa revealed by radiograph was analyzed using Fourier Progression. The study was done on 65 males' radiographs which showed no pathological findings of the temporomandibular joint. Ages of the subjects ranged from eleven to fifty. The radiographs were divided into four groups by age : I ; 11-20, II ; 21-30, III ; 31-40, IV ; 41-50. Each group was compared for existence of right and left difference, age difference, and sex difference. The results obtained are as follows : 1. Morphologic difference between the right and left mandibular fossa was seen in the First and Third Groups. The difference in the First Group was due to the fact that the anterior part of the left mandibular fossa was deeper than the right one. In the Third Group, the posterior part of the left mandibular fossa was shallower than the right one. 2. Sex difference of the right mandibular fossa was seen in all of the groups except in the comparison of the Third with Fourth Groups. The male's mandibular fossa increases in depth in proportion to aging till thirties. The morphology of the mandibular fossa of the First Group was asymmetric but it becomes symmetric in the Fourth Group. 3. Sex difference was seen in the morphology of the mandibular fossa. Female's fossa of the First Group was deeper than the male's, and both showed asymmetry in the morphology. In the comparison of the Second Group of both sexes, only the asymmetry of the morphology differed. Male's fossa of the Third Group was deeper than the female's. In the comparison of the Fourth Group of the both sexes, only the asymmetry of the morphology differed.

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