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Dental anatomy and coronal cementum in the Mongolian gerbil.

The embryogenesis and morphologic characteristics of the teeth and supporting structures of the Mongolian gerbil were studied in animals ranging in age from ten days to five years. Three molar teeth are present in each quadrant and consist of three, two, and one lobe respectively. The occlusal surfaces are flat and devoid of enamel. The lobular nature of the teeth effects a series of buccal and lingual grooves extending almost the entire height of the crown. On the buccal and lingual prominences of the crown lobes and on the interproximal surface, the enamel is covered by a thin layer of cementum which runs one-sixth up the height of the tooth. Within the grooves, a thick covering of globular-like cementum, which is continuous with the root covering, can be seen.