Sasaki T, Tominaga H, Higashi S
J Anat. 1984 May;138 ( Pt 3)(Pt 3):485-92.
The morphological features of odontoblast processes in young kitten odontoblasts were studied by thin section and freeze-fracture electron microscopy. Freeze-fracture replication revealed depressions with particles on the plasma membranes of the proximal parts of odontoblast processes. Comparison with thin sections suggested that these depressions represented sites of endocytosis. Frequent depressions with particles (corresponding to coated pits in thin sections) indicate the high absorptive activity of young odontoblasts. The results indicate that odontoblasts, especially in the proximal parts of their processes, play a significant functional role in the modification of the predentine matrix during early dentinogenesis.
通过超薄切片和冷冻蚀刻电子显微镜研究了幼猫成牙本质细胞突起的形态特征。冷冻蚀刻复型显示，成牙本质细胞突起近端质膜上有带颗粒的凹陷。与超薄切片比较表明，这些凹陷代表内吞作用位点。频繁出现的带颗粒凹陷（相当于超薄切片中的被膜小窝）表明幼龄成牙本质细胞具有较高的吸收活性。结果表明，成牙本质细胞，尤其是其突起的近端部分，在早期牙本质形成过程中对前期牙本质基质的修饰起重要作用。
