Szabó J, Trombitás K, Szabó I
Arch Oral Biol. 1985;30(10):705-10. doi: 10.1016/0003-9969(85)90181-5.
Twenty-one fully-formed healthy human premolars were fixed, resin-impregnated and freeze-fractured. Specimens were critical-point dried. The wall of the dentinal tubules was lined with a two-layered structure which extended from the pulp-predentine border to the dentine-enamel junction; there was a fibrous outer layer and an amorphous, membrane-like inner layer. The lining sheath was separated from the odontoblast process by a space which widened toward the outer surface of the dentine, although occasionally in the mid and outer dentine the lumen was constricted by transverse septa of the sheath which were in close proximity with the odontoblast process. Some tubules were divided into a system of chambers by transverse extensions of the membrane-like inner layer of the sheath.
21颗完全形成的健康人类前磨牙被固定、树脂浸渍并冷冻断裂。标本经临界点干燥处理。牙本质小管壁内衬有两层结构，该结构从牙髓-前期牙本质界延伸至牙本质-釉质界；有一层纤维外层和一层无定形的膜状内层。衬里鞘与成牙本质细胞突起之间有一个间隙，该间隙向牙本质外表面增宽，尽管偶尔在牙本质中部和外部，管腔会被鞘的横向隔膜挤压变窄，这些隔膜与成牙本质细胞突起紧密相邻。一些小管被鞘的膜状内层的横向延伸分成一系列腔室。
