272 MICROSCOPIC ANATOMY OF THE TEETH 



showed that in early stages of the development of dentine 

 there was a penetration of pulp fibres between the odonto- 

 blasts, and argued that this indicated that the dentine was 

 not a product of the odontoblasts but was formed by the 

 connective tissue of the pulp. The fibres described by Von 

 Korff in the early development of the dentine are arranged 

 in a corkscrew-like form, terminating in the forming dentine 

 in a fan-shaped expansion of fibres (fig. 174). He claimed in 

 this paper that he was the first to describe connective 

 tissue in the dentine, but as Von Ebner points out, he had 



FIG. 172. Pulp and dentine of Rat showing incorporation of connective 

 tissue in dentine, (x 175.) 



himself described it thirty years before and, as he states, it 

 had also been demonstrated by Gebhart, Ramon y Cajal 

 (1888), and Mummery (1892). 



Guido Fischer (7), writing in 1910, says that while he 

 was at first inclined to agree with Von Korff s theory, he 

 cannot accept this author's conclusions. While pulp fibres 

 are evident in developing dentine, as had been pointed out 

 by previous authors, he does not agree to this interpretation 

 of them as dentine producers, and agrees with Von Ebner 

 that the collagen fibres of the dentine substance are arranged 

 at right angles to the dentinal tubes, that they are not 

 gelatine yielding, and do not show double refraction. 



