. Comparative anatomy. Anatomy, Comparative. 198 COMPARATIVE ANATOMY of the root, although teeth erupt before the root has completed its growth. The eruption of the deciduous teeth begins during the seventh month after birth, and is usually completed by the end of the second year. Of Dental sac. Outer layer. Inner layer. Outer enamel cells. Enamel pulp. Inner enamel Dentine Odontoblasts Dental papilla (future pulp). Blood vessel Bony trabecula of the lower jaw Fig. 151.—Longitudinal section of a deciduous tooth of a newborn dog. The white spaces between the inner enamel cells and the e
. Comparative anatomy. Anatomy, Comparative. 198 COMPARATIVE ANATOMY of the root, although teeth erupt before the root has completed its growth. The eruption of the deciduous teeth begins during the seventh month after birth, and is usually completed by the end of the second year. Of Dental sac. Outer layer. Inner layer. Outer enamel cells. Enamel pulp. Inner enamel Dentine Odontoblasts Dental papilla (future pulp). Blood vessel Bony trabecula of the lower jaw Fig. 151.—Longitudinal section of a deciduous tooth of a newborn dog. The white spaces between the inner enamel cells and the enamel are artificial, and due to shrinkage. X42. (From Bremer's "Textbook of ;) the permanent set, the first to erupt are the first molars which appear during the sixth year. The last to erupt are the third molars, which frequently become impacted in the jaw-bone so that eruption is 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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