各種歯髄疾患における神経線維の動態に関する研究

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In order to study the change of pulp nerve fibers in various pulp diseases, continuous sections of 227 extracted human teeth were made, stained by nerve staining method, and observed. The results were as follows : 1. In pulp hyperemia, those in the early stages did not show marked difference in nerve fibers. However, in the case with continuous hyperemia, findings of slight swelling, hypochromatosis and beading were observed. 2. In acute serous pulpitis, findings of slight swelling, hypochromatosis, and meandering of the nerve fibers in the inflammation focus and around the focus were observed. These changes however were observed mostly in thick nerve fibers ; most thin nerve fibers showed healthy findings. 3. In acute suppurative pulpitis in which inflammation was limited to a part, most of the nerve fibers in the inflammatory tissue surrounding the localized suppurative focus were degenerated. However, healthy nerve fibers were observed in thin nerve fibers. When suppurative inflammation extended to the whole pulp, most nerve fibers showed degenerative findings. 4. In the case of acute gangrenous pulpitis, whole nerve fibers were degenerated markedly or in decomposition process. 5. In the ulcerative membrane of chronic ulcerative pulpitis and in the abscess membrane of chronic closed pulpitis, reticular distribution of remarkably minute nerve fibers was observed. 6. A considerable number of regenerated nerve fibers were observed in pulp polyp and some with free nerve endings extending into the leucocyte layer in the outermost surface were seen. 7. No marked changes were seen in the nerve fibers distributed in the odontoblastic layer which showed vacuolar degeneration. 8. Most of the nerve fibers in the calcareously degenerated portion underwent swelling, laceration, and granular decomposition. A number of them were about to disappear. 9. In reticular atrophy, almost no changes were observed in the early stages. However, degeneration of nerve fibers progressed as atrophy progressed. In the case where atrophy extended to the whole pulp, most nerve fibers showed marked degenerative findings. 10. The foregoing findings indicate that nerve fibers in dental pulp show strong resistance against destructive changes of various pulp diseases and that they survive considerably longer than the surrounding tissues.
九州歯科学会の論文
1985-02-25

各種歯髄疾患における神経線維の動態に関する研究

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