THE TEETH 



139 



posed to contain a gelatinous material only. Note the connection 

 between these spaces and the termini of the dentinal fibers.) 



8. The cementum. (a) The lacunae. (&) Bone-corpuscles 

 in the last. (The canaliculi are not well demonstrated here, as the 

 tissue is very translucent and feebly stained. These minute canals 

 are better indicated in dried bone.) 



9. The pericementum. (Note its dense fibrillar meshwork.) 



FIG. 92. TRANSVERSE SECTION OF FANG OF A HUMAN DECIDUOUS CANINE TOOTH, 

 DECALCIFIED WITH CHROMIC AND NITRIC ACIDS AND STAINED WITH PICRO- 



CARMINE (X 400). 



A, B. Line through the dentine indicating the point at which the edges have been made to 

 join after the omission of an intervening portion. This was necessary in order that the dif- 

 ferent layers might be shown in a single drawing. 



C, D. Junction line between the pulp and dentine. 



E, F. Junction line between dentine and cementum. 



G, G. Odontoblasts of the pulp. 



H, H. Stellate connective tissue cells of the pulp. 



I, I. Dentinal processes of odontoblasts. 



J, J. Dentinal fibers. 



K, K. Terminal branching dentinal fibers. 



L, L. Interglobular spaces of dentine. 



M, M. Lacunae of the cementum. The drawing does not show the periosteal investiture 

 of the crusta. 



