Rabbits
Have 28 teeth
Dental formula: 2 (I 2/1, C 0/0/, P 3/2, M 3/3)
diphyodont = have deciduous teeth - lost in the uterus or just after birth
duplicidentata = Peg teeth: 2nd maxillary incisors, just behind the upper primary incisors
All teeth grow all life = open roots
Incisors = lateral slicing action
Incisor Growth 2mm/wk / 2.4mm/wk
Rats
Have 16 teeth
Dental Formula: 2 (I 1/1, C 0/0, P 0/0, M 3/3)
Only Incisors grow throughout life
Yellow enamel is normal
monophyodont & simplicidentata
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Guinea Pigs
Have 20 teeth
Dental formula: 2 ( I 1/1, C 0/0, 1/1, M 3/3)
Yellow incisors/enamel
monophyodont: no deciduous (baby) teeth
Simplicidentata: no peg teeth
Adapted to eating coarse grasses
Chinchillas
Have 20 teeth
Dental formula: 2 (1/1, C 0/0, P 1/1, M 3/3)
Open Roots: All teeth grow throughout life
Cheek teeth: occlusal plane ~30 degrees
Monophyodont: no deciduous (baby) teeth
Simplicidentata: no peg teeth
Incisors: prehending food and gnawing action
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