. Elements of histology. Histology. Chap. XXI.] 171 CHAPTER XXI. TEETH. 227. A human tooth, adult and milk-tooth, consists (Fig. 102)iof (a) the enamel covering the crown, (b) the dentine forming the real matrix of the whole tooth, and surrounding the pulp cavity both of the crown and fangs, and (c) the cement, or crusta petrosa, or sub- stantia osteoidea. This cement covers the outside of the dentine of the fang or fangs, in the same way as the enamel covers the dentine of the crown. The crusta pe- trosa is covered on its outside by a dense fibrous tissue acting as a perios- teum to it, and i
. Elements of histology. Histology. Chap. XXI.] 171 CHAPTER XXI. TEETH. 227. A human tooth, adult and milk-tooth, consists (Fig. 102)iof (a) the enamel covering the crown, (b) the dentine forming the real matrix of the whole tooth, and surrounding the pulp cavity both of the crown and fangs, and (c) the cement, or crusta petrosa, or sub- stantia osteoidea. This cement covers the outside of the dentine of the fang or fangs, in the same way as the enamel covers the dentine of the crown. The crusta pe- trosa is covered on its outside by a dense fibrous tissue acting as a perios- teum to it, and is fixed by it to the inner surface of the bone forming the wall of the alveolar cavity. 228. The enamel (Fig. 103) consists of thin microscopic pris- matic elements, the enamel prisms placed closely, and extending in. Fig. Longitudinal Section through the Prssrnolar Tooth of Cat. a, Enamel: 5, dentine ; c,crusta ; e, periosteum: /, bone of alveolus. (Waldeyer, in Strieker's Manual.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Klein, E. (Edward), 1844-1925. Philadelphia : H. C. Lea's Son
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