人の前歯, 小臼歯における歯髄腔の年令的変化に関する研究

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The pulp cavity of human being is reduced because of physiological function and pathological cause and it is made morphological changes continuously as he grows older. It is of great importance from the clinical view. To know the variation of the pulp cavity on each age is a fundamental matter to practice the root canal treatment exactly. A total of 782 human front teeth and premolar was used to examine ageing changes in the pulp cavity. Results were summarized as follows : 1. The pulp cavities of the upper incisor were reduced towards both of the mesiodistal and labio-lingual directions in each section of the teeth. The reduction was found particularly in the young age at the middle and apical sections of the root (Fig. 3∿6). 2. On the lower incisor, the pulp cavities were reduced in each section as one grew older. The stricture was found towards both of the mesio-distal and labio-lingual directions after the middle age at the coronal and cervical sections, and particularly towards the labio-lingual direction in the young age at the apical section of the root (Fig. 7∿10). 3. The pulp cavities of the upper and lower canine scarcely changed on the whole from young age to old, but the reduction was found only in the young age at the apical section (Fig. 11∿14). 4. The pulp cavities of the upper premolar were reduced as ageing and the stricture was found towards bucco-lingual direction after the middle age at the middle section of the root. On the upper first premolar, particularly the stricture was found towards the bucco-lingual direction in the young age at the cervical and upper sections of the root, and scarcely found in the old age at the apical section (Fig. 15∿18). 5. On the lower premolar, the pulp cavities were reduced towards the bucco-lingual direction in the young age at the middle and apical sections of the root (Fig. 19∿22). 6. The centers of the pulp cavities laid at the mesio-buccal region or medium of the buccal region of the teeth on the whole. Some of the teeth showed the movement of the centers in each section as ageing (Table 32∿41).
九州歯科学会の論文
1974-03-31

人の前歯, 小臼歯における歯髄腔の年令的変化に関する研究

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