Topics: Embryo, Temporomandibular joint, Mandible Pages: 2 (648 words) Published: February 12, 2013
Oral Embryology

Britney Eylar
Mod B

Prenatal Development and the Life cycle of a tooth.
All of the mother and father genes go to work when the process of making a baby occurs. Whether the baby will have big teeth or small teeth, white or stained teeth it’s all genetic. Occasionally there are other factors that can intersect this course and can make development go off path whether it’s from environmental factors or genetic factors. The mommy is supposed to take care of the baby and nurture them while in the womb they are the sole provider, but sometimes things happen like if the mommy drinks alcohol or does drugs it can have a big negative effect on the babe. The average length of time for prenatal growth to complete is 40 weeks from the date of conception. During this time, a single-celled zygote grows in a chain of stages into a full-term baby. The three main stages of prenatal growth are the germinal stage, the embryonic stage, and the fetal stage. The embryonic stage initiates after implantation and lasts until eight weeks after conception. Shortly after implantation, the cells continue to quickly divide and bunches of cells begin to take on different purposes (called differentiation). A process (gastrulation) leads to the formation of three distinct layers called germ layers: the ectoderm (outer layer), the mesoderm (middle layer), and the endoderm (inner layer). As the embryo develops, each germ layer differentiates into different tissues and structures. By the end of the embryonic stage, all essential external and internal structures have been formed. The embryo is now referred to as a fetus. Most parts of our body are pretty much formed at birth. As we get older, our organs develop and grow, but their physical form stays fairly constant. The human tooth has its own life story the 6 morphological stages of tooth development:

Head & Neck Anatomy
Britney Eylar
Mod B
Ms. Jordon

We’ve touched basis on frontal,...
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