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R. Williams and H. Evans (1978)

Prenatal Dental Development in the Dog, Canis familiaris: Chronology of Tooth Germ Formation and Calcification of Deciduous Teeth

Anatomia, Histologia, Embryologia, 7(2):152-163.

Observations on a sizeable collection of purebred canine fetuses of known age has afforded the opportunity to report baseline data on the timing of tooth germ development in the dog. The chronology of development of the deciduous dentition has been studied in a collection of 172 embryos and fetuses from purebred Beagles of known gestation. Microscopic examination of serial sections, enlarged reconstructions from serial sections and alizarin-stained clearings were used to visualize stages of development. These observations establish that the dental lamina is initiated at 25 days gestation and that calcification begins at 42 days in the deciduous teeth.

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