The relationship between odontoblasts and pulp capillaries in the process of enamel- and cementum-related dentin formation in rat incisors
The relationship between odontoblasts and pulp capillaries in the process of enamel- and cementum-related dentin formation in rat incisors
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大鼠门牙牙釉质和牙骨质相关牙本质形成过程中成牙本质细胞与牙髓毛细血管的关系
DOI：
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发表时间：
1992
影响因子：
3.6
通讯作者：
Shigemitsu Yoshida
中科院分区：
文献类型：
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作者：
H. Ohshima;Shigemitsu Yoshida
摘要利用光学显微镜和透射电子显微镜，研究了大鼠下切牙（唇侧和舌侧）牙本质形成过程中成牙本质细胞和牙髓毛细血管之间的关系。成牙本质细胞从顶端到切端表现出显着差异。在牙齿的根尖附近，“未成熟的成牙本质细胞”排列成单层，这些细胞被认为参与了外套牙本质的形成，连续的毛细血管位于成牙本质细胞的正下方。在牙齿的中间，“成熟的成牙本质细胞”具有高度发达的细胞器和显着的突起，形成了假复层层；在靠近前牙本质的这些细胞之间发现了有孔的毛细血管。唇侧（牙釉质相关）侧的成牙本质细胞层高度和牙本质沉积率显着大于舌侧（牙骨质相关）侧。在切端附近，与牙骨质相关的成牙本质细胞的高度和数量逐渐减少，成为产生管状牙本质的“后成牙本质细胞”；连续的毛细血管位于后成牙本质细胞下方。然而，在唇侧（与牙釉质相关）一侧，成牙本质细胞保留了假分层。在成牙本质细胞层中仍然观察到有孔的毛细血管。唇侧未形成管状牙本质。
SummaryThe relationship between odontoblasts and pulp capillaries in the process of dentinogenesis was studied in rat lower incisors, both on the labial and lingual sides, using light and transmission electron microscopy. The odontoblasts showed remarkable differences from the apical to the incisal end. Near the apical end of the tooth, “immature odontoblasts”, which were thought to be involved in the formation of the mantle dentin, were arranged in a single layer, and continuous capillaries were located just beneath the odontoblasts. In the middle of the tooth, “mature odontoblasts” with highly developed cell organelles and notable processes formed a pseudostratified layer; fenestrated capillaries were found between these cells close to the predentin. The height of the odontoblast layer and the rate of dentin deposition on the labial (enamel-related) side was significantly greater than that on the lingual (cementum-related) side. Near the incisal end, cementum-related odontoblasts gradually decreased in height and number to become “post-odontoblasts” that produced atubular dentin; continuous capillaries were located subjacent to the post-odontoblasts. On the labial (enamel-related) side, however, odontoblasts retained their pseudostratification; fenestrated capillaries were still observed in the odontoblast layer. No atubular dentin was formed on the labial side.