Licence: Public Domain Mark
Credit: A manual of dental anatomy : human and comparative / by Charles S. Tomes. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
47/614 (page 33)
![Imt in the root they are so numerous as to afford a ready means of distinguishing whence the section has been taken. The small branches above alluded to ai'c given off at right angles to the course of the main tube, which, however, itself frequently divides and subdivides, its divisions pursuing a nearly parallel course. The tubes are subject to slight varicosities, and their course is sometimes apparently interrupted by a small inter- globular space, as is to be seen in an extreme degree in the dentine of Cetacea. Owing to their breaking up into minute branches, some Fig. 10 ('). of tiic tubes become lost as they appi'oach the suiface of the dentine, and apparently end in fine pointed extremities. Some terminate by anastomosing with terminal branches of others, forming loops near to the surface of the dentine ; others terminate far beneath the surface in a similar wa}'. Some tubes pass into the small interglobular spaces which constitute the granular layer' described by my father, while others again pass out altogctiior beyond the Ifoundary of the dentine and anastomose with the caualiculi of the lacun.'c in the ccmentum. 'J'he enamel iilso may be ])enetrateil liy the dentinal tubes, though this when occurring in tiie human subject must be regarded as exceptional and almost pathological {') Terniiiiatidii of ii dentinal tube in liu.' inidsl dl' tlic ilcntiii'J—liumaii.](https://iiif.wellcomecollection.org/image/b21932025_0047.jp2/full/800%2C/0/default.jpg)
