200 MICROSCOPIC ANATOMY OF THE TEETH 



preparations of a finer fibrillation between the larger cells 

 and their processes, which may perhaps be the development 

 of fibres within the exoplasm as described by Mall. If this 

 be the case it seems possible that the connective -tissue fibres 

 of the pulp are formed in both ways by prolongation from 

 the cell protoplasm or endoplasm and within the ground 

 substance or exoplasm. Fig. 112, however, from a similar 



z 





FIG. 113. Fibres of Von Korff in tooth germ of Cat. o. Odontoblasts ; 

 /. fan-like expansion of fibre bundles ; g. corkscrew -like fibres ; z, 

 odontogenic zone ; c. commencing calcification ; a. ameloblasts. 

 (From illustration to his paper.) 



pulp prepared by Ramon y Cajal's silver nitrate process, 

 would seem to indicate that the fibres in this early stage are 

 all processes of cells, and the finer fibrillation seen in figs. 110 

 and 111 appears to arise from minute cells. In the dentine 

 papilla in the early stages of the developing tooth germ in 

 the embryo, bundles of connective tissue have been described 

 by Von Korff (fig. 113), and the delicate connective- tissue 

 fibres which enter into the formation of the dentine at all 



