Roßgardt Jessica, Heilen Laura Beate, Büttner Kathrin, Dern-Wieloch Jutta, Vogelsberg Jörg, Staszyk Carsten
Institute of Veterinary-Anatomy, -Histology and -Embryology, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Str. 98, 35390 Giessen, Germany.
Unit for Biomathematics and Data Processing, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Str. 95, 35390 Giessen, Germany.
Vet Sci. 2022 Oct 30;9(11):602. doi: 10.3390/vetsci9110602.
In the crown pulp of brachydont teeth, a cell-free and a cell-rich zone are established beneath the odontoblastic layer, indicating a mature status. For the equine dental pulp, there are no descriptions which allow for a comparative analysis with regard to functional requirements in terms of lifelong secondary dentin production to compensate for occlusal wear. For histomorphological and immunohistological investigations, ten incisors and ten check teeth were used from seven adult horses and five foals. In the periphery of the equine dental pulp, a constant predentin and odontoblastic cell layer was present, followed by densely packed fibroblastic cells, capillary networks, and a high concentration of nerve fibers, suggesting a subodontoblastic supportive zone. Whilst the size of the equine dental pulp decreased with age, the numbers of blood vessels, nerve fibers, and fibroblastic cells increased with age. Histological analysis of the equine dental pulp did not show a cell-free and cell-rich zone as described in the brachydont crown pulp. The equine dental pulp remained in a juvenile status even in aged horses, with morphological features indicating a high capacity for dentine production.
在短冠齿的冠髓中，无细胞区和富细胞区在成牙本质细胞层下方形成，表明其处于成熟状态。对于马牙髓，目前尚无描述可用于就终生继发性牙本质生成以补偿咬合磨损的功能需求进行比较分析。为进行组织形态学和免疫组织学研究，从7匹成年马和5匹幼驹中选取了10颗切牙和10颗颊齿。在马牙髓的外周，存在一层恒定的前期牙本质和成牙本质细胞层，随后是紧密排列的成纤维细胞、毛细血管网络以及高浓度的神经纤维，提示存在成牙本质细胞下支持区。虽然马牙髓的大小随年龄增长而减小，但血管、神经纤维和成纤维细胞的数量随年龄增长而增加。马牙髓的组织学分析未显示出短冠齿冠髓中所描述的无细胞区和富细胞区。即使在老龄马中，马牙髓仍处于幼年状态，其形态特征表明具有较高的牙本质生成能力。
