prolonged through the canal oj theroot to the ape.x oj the root whcrt it opens to the exterior of the tooth at the foramen apicis denlis. Theforamen is shown, but is not labelled, in Fig. 74. The solid portion ofthe tooth consists of three calcified substances, the dentine or ivory (suh-stantia… … Ct-ment. Hi.- niTiniNAL Groind Shction of■\N Incisor Tooth , 4. Digitized by Microsoft® 68 HISTOLOGY. only at the foramen. Nowhere does the dentine reach the outer surfaceof the tooth. In the root it is covered by the cement layer which increasesin thickness from the neck toward the apex; and in…
Histology · Microscopy
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