Per'kova N I, Kalinin V I, Nevorotin A I
Stomatologiia (Mosk). 1990 Jan-Feb;69(1):13-7.
Ultrastructure of cellular and extracellular constituents of the predentin and adjacent strip of dentin was investigated in both erupted and unerupted but completely shaped third molars of human adults using cautious fixation and demineralization techniques. The odontoblast processes (OP) were slightly bent at their bases to run further straight and parallel to each other across dentin and predentin. The OP cytoplasm contained numerous microfilaments and solitary microtubules. Occasional mitochondria, lysosomes, microvesicles, lipid globules and endoplasmatic reticulum profiles could be found throughout the whole length of the OP under study. Axons and their terminals of apparently efferent type attached to some of the OPs were found in both dentin and predentin. A great bulk of dentin was occupied with the collagen fibers intermingled with the amorphous matrix and occasional dense precipitates next to dentin. Intensive mineralization was found in dentin except the spaces occupied by dentin canaliculi.
利用谨慎的固定和脱矿技术，对成年人类已萌出和未萌出但已完全成形的第三磨牙中前期牙本质和相邻牙本质条带的细胞和细胞外成分的超微结构进行了研究。成牙本质细胞突起（OP）在其基部略有弯曲，然后进一步伸直并彼此平行地穿过牙本质和前期牙本质。OP细胞质中含有大量微丝和单个微管。在所研究的OP的整个长度上，偶尔可以发现线粒体、溶酶体、微泡、脂滴和内质网轮廓。在牙本质和前期牙本质中均发现，一些OP附着有明显为传出型的轴突及其终末。大部分牙本质被胶原纤维占据，这些胶原纤维与无定形基质以及牙本质旁偶尔出现的致密沉淀物相互交织。在牙本质中发现了强烈的矿化现象，牙本质小管占据的空间除外。
