Autonomic nerve endings in the odontoblast/predentin border and predentin of the canine teeth of dogs.
Autonomic nerve endings in the odontoblast/predentin border and the predentin were observed by electron microscopy in the canine teeth of dogs. Adrenergic nerve endings with a number of very electron-dense granular vesicles and a minority of agranular vesicles of different sizes were clearly observed, but seen rarely, at the odontoblast/predentin border, in the predentin adjacent to the odontoblast processes, and as free endings in the middle part of the predentin. Cholinergic nerve endings were also observed with a number of agranular vesicles of different sizes without any visible exocytosis, in the odontoblast/predentin border, and in the predentin. Near the areas of collagen formation, extensive exocytosis of granular vesicles of different sizes was observed in adrenergic nerve endings located as free nerve endings in the predentin.
Inoue
H
H
Fukuoka Dental College, Fukuoka-shi, Japan.
Kurosaka
Y
Y
Abe
K
K
D000320:Adrenergic Fibers; D000818:Animals; D002799:Cholinergic Fibers; D003804:Dentin / Q000294:innervation*; D004285:Dogs; D009411:Nerve Endings / Q000033:anatomy & histology*; D009804:Odontoblasts