Four teeth extract for hands-on study The lower jaw of an eleven year old depicts deciduous teeth being replaced by permanent teeth. Unbreakable plastic, the model has been scaled to 3-1/2 times life size to enhance difficult to observe details.

The outer portion of the jaw bone has been cut away exposing the roots of the teeth, their nerves and blood vessels. Four teeth can be extracted from the jaw: an incisor, a premolar, molar, and a developing canine. One molar has caries. Another is sectioned longitudinally revealing its enamel, dentine, cementum, and pulp.

Thirty-one hand numbered structures are identified in the accompanying key. Overall dimensions: 14 x 9 x 4 inches (36 x 23 x 10 cm)

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