Initiation Stage:
This is the first stage of odontogenesis; it begins between the sixth and seventh week of prenatal development during embryonic period, where ondontogenesis of primary (baby) dentition starts.
At the beginning of the sixth week, the embryo’s primitive mouth is lined by ectoderm. The outer position of the ectoderm gives rise to oral epithelium which consists of horse shoe shaped band of tissue. There is a base membrane, which separates developing oral epithelium and mesenchyme.
During the later portion of the seventh week, the oral epithelium grows and produces a layer known as dental lamina. The dental lamina starts to form in the mid line for both arches and periodically develops.
At the beginning of the sixth week, the embryo’s primitive mouth is lined by ectoderm. The outer position of the ectoderm gives rise to oral epithelium which consists of horse shoe shaped band of tissue. There is a base membrane, which separates developing oral epithelium and mesenchyme.
During the later portion of the seventh week, the oral epithelium grows and produces a layer known as dental lamina. The dental lamina starts to form in the mid line for both arches and periodically develops.