Human tooth development having negative effects on human health, including, but not limited to, fetal development. As shown in animal studies which mimic human enamel, the mother’s consumption of products with BPA during pregnancy can lead to the child’s tooth development being obstructed. Those children are shown to be prone to incisor and first molar hypomineralization, a weakened state of the enamel. Additionally, it is most important for mother’s to avoid BPA during pregnancy, but also avoid BPA-use in the child’s products up to five months of age. Anodontia is a complete lack of tooth development, and hypodontia is a lack of some
Eggshell the uterus. The egg can take up fluids and grow in size during this process, and the final, most rigid layer is not added until the egg is full-size. Hatching birds, amphibian and egg-laying reptiles have an egg-tooth used to start an exit hole in the hard eggshell. Eggshell waste is fundamentally composed of calcium carbonate, and has the potential to be used as raw material in the production of lime. Eggshell An eggshell is the outer covering of a hard-shelled egg and of some forms of eggs with soft outer coats. Insects and other arthropods lay a variety of