. Comparative dental anatomy. Teeth; Dentistry. THE TEETH OF VEETEB-EATES 73 the entoconid. The position of the talonid is such that the hypoconid falls in the center of the trigon of the npper molar (Fig. 20). There is then de- veloped on the disto-lingnal surface of the trigon (upper molar) a talon which carries a cusp called the liypocone, thus making a quadritubercular molar as seen in the upper molars of man. This fourth cusp falls between the lower cusps as. Fig. 21.—Diagram showing the position of the talon of the upper molar. 1. Protoeonid (Mesio-buccal cusp). a. Protoeone (Mesio-lingu
. Comparative dental anatomy. Teeth; Dentistry. THE TEETH OF VEETEB-EATES 73 the entoconid. The position of the talonid is such that the hypoconid falls in the center of the trigon of the npper molar (Fig. 20). There is then de- veloped on the disto-lingnal surface of the trigon (upper molar) a talon which carries a cusp called the liypocone, thus making a quadritubercular molar as seen in the upper molars of man. This fourth cusp falls between the lower cusps as. Fig. 21.—Diagram showing the position of the talon of the upper molar. 1. Protoeonid (Mesio-buccal cusp). a. Protoeone (Mesio-lingual cusp). 2. Paraconid (Mesio-lingual cusp). b. Paracone (Mesio-buccal cusp). 3. Metaconid (Disto-lingual cusp). c. Metacone (Disto-buccal cusp). 4. Hypoconid (Disto-buccal cusp). d. Hypocone (Disto-lingual cusp). shown in Fig. 21. The cusps of the lower molar continue to develop and change. The paraconid becomes reduced in size and is missing in the lower permanent molars of man, but exists in the deciduous lower first molar as a small cusp. The paraconid can also be seen in the lower teeth of the opossum. The position of the paraconid and the cusps of the talonid, as seen in the lower first deciduous molar of man, is shown in Fig. 22 with. 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 Thompson, Alton Howard, 1849-1914; Dewey, Martin, 1881-. St. Louis, C. V. Mosby
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