648 



THE TEETH. 



spaces were seen traversing the tissue, from which, evidently, the new forma- 

 tion of the territories had started. This variety is regular osteo-dentine. 

 (See Fig. 283.) 



2. Pulp-stones Composed of Regularly Developed Lamella ted Bone. I have 

 observed pulps almost exclusively composed of a dense, fibrous connective 

 tissue, the bundles of which were interlacing, so as to establish a regular 

 cicatricial connective tissue. Scanty nerve-bundles and blood-vessels trav- 

 ersed this tissue, which in some places appeared to be more or less crowded 

 with medullary or inflammatory corpuscles. In such fibrous pulps I have seen 

 formations of fully developed bone-tissue, composed of more or less regular 

 lamellae, or of calcified fibrous lamellae. In them a large number of irregular 

 branching bone-corpuscles were seen, arranged in rows or chains, where the 

 basis-substance was of a more fibrous character. Sometimes the bone-tissue 



FIG. 284. OSSIFICATION OF THE PULP. 



L, longitudinal ; T, transverse sections of bundles of cicatricial fibrous connective tissue ; 

 B, spiculae of lamellated bone, with regularly developed bone-corpuscles. Magnified 500 

 diameters. 



appeared in lamellated islands, sharply marked from the surrounding fibrous 

 tissue. No formation of secondary dentine was found in these cases. (See 

 Fig. 284.) 



3. Pulp-stones Composed of a Mixture of Regular Bone and Dentinal Tissue. 

 In rare instances I have met with pulp-stones composed of partly secondary 

 dentine and lamellated bone, in such a way that irregularly bounded masses 

 of bone contained a few large bone-corpuscles, and were surrounded by a 

 basis-substance which held exclusively irregular, wavy, dentinal canaliculi. 



4. Pulp-stones Composed of Dentine, with the Features of Primary Dentine. 

 One of the pulp-stones which I examined was a mass about the size of a pea, 



