ヒト下顎結合部の癒合に関する組織学的研究第 4 編 : 初期像について

概要

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In order to clarify initial figure of the mandibular symphysis, which was closely associated with the development of the bone (=the submaxilla), a histological study was done based on serial sections from 12 human fetuses (ranging from 2.5 up to 10 cm CF length). The results were as follows. The development of the mandible : 1. The first formation of the osteoid tissue was observed, showing the contact with Meckel's cartilage in the undifferentiated mesenchymal connective tissue around cartilage of the 2.5cm case. 2. The osteoid tissue was differentiated into the bone tissue in the 5.5cm case. 3. The bone tissues, which had been formed at the upper and lower sides of Meckel's cartilage, extended above and below with the growth of the fetuses. Furthermore, the upper end of the bone tissue extended inside and outside, while the lower end extended outside and inside, and the center extended outside continuously. Thus, the anlage of the mandible was formed. The initial figure of the mandibular symphysis : 1. The initial figure of the mandibular symphysis was confirmed in the 8.0cm case. 2. The bone trabeculae inside the lower end of the bone tissue played an important role in the development of the mandibular symphysis. 3. The extension of the trabecular bone was differentiated, grown, and increased by a chain of structure including connective tissue layer, transitional layer, osteoblastic layer and homogenous layer.
九州歯科学会の論文
1985-12-25