Apexogenesis に伴う歯髄内神経線維の消長に関する実験的研究

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概要

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• Pulpotomy with calcium hydroxide was performed on teeth with incomplete root of young dogs, and growth of root and apical closure thereafter, or changes in pulpal nerve fibers at what is called Apexogenesis were investigated neurohistologically. The results were as follows : 1. On 7th day postoperatively, regenerated nerve fibers extended to the matrix formed directly under the boundary zone of the plane of pulp cross section. On 14th day, degenerated nerve fibers remaining in the living pulp were nearly nil. This stage corresponded to non-apposition stage of cellular cementum of root apex in normal growth of root, and medium and small nerve bundles, single nerve fibers, and minute nerve fibers with Schwann cells were seen ascending straight mainly in the region between the tips of Hertwig's epithelial sheath in the pulp of the root. 2. On 35th day, the dentin barrier was formed about evenly. Regenerated nerve fibers and their branches extended toward the periphery, branched out further on reaching the periphery, and formed relatively sparse nerve plexuses. This stage corresponded to apposition stage of cellular cementum of root apex in normal growth of root, and was characterized by degenerative findings of tortuous courses and moniliform in the nerve fibers penetrating between cementoblasts and in the nerve fibers penetrating through gaps where future side branches would be. 3. On 95th day, formation of dentin barrier and root dentin was stabilized. At the same time, nerve plexuses at the periphery of dentin barrier were dense and nerve endings were abundant. Many individual nerve fibers had about the same width as the contrast. This stage corresponded to terminal stage of root formation, and was characterized by arrangement into bundles of nerve fibers penetrating into the pulp, penetration together with blood vessels of mainly large, medium, and small nerve bundles through apical branches, and by absence of minute nerve fibers with Schwann's cells, and reduction in single nerve fibers.

• 九州歯科学会の論文
• 1985-02-25

著者

• 神内 正人

  九州歯科大学大学院歯学研究科

関連論文

• Apexogenesis に伴う歯髄内神経線維の消長に関する実験的研究 : 主論文の要旨
• Apexogenesis に伴う歯髄内神経線維の消長に関する実験的研究
• 3. 歯根未完成歯歯髄切断後の創傷治癒に関する神経組織学的研究(第 2 報)(第 44 回九州歯科学会総会講演抄録)
• 3∿1020 歯根未完成歯歯髄切断後の創傷治癒に関する神経組織学的研究(第 2 報)

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