Human tooth development composed of keratin which gives rise to the enamel organ. As in other aspects of human growth and development, nutrition has an effect on the developing tooth. Essential nutrients for a healthy tooth include calcium, phosphorus, and vitamins A, C, and D. Calcium and phosphorus are needed to properly form the hydroxyapatite crystals, and their levels in the blood are maintained by Vitamin D. Vitamin A is necessary for the formation of keratin, as Vitamin C is for collagen. Fluoride, although not a nutrient, is incorporated into the hydroxyapatite crystal of a developing tooth and bones. The dental theory is
The Outermost House The Outermost House The Outermost House is a book by naturalist writer Henry Beston. It was published in 1928 by Doubleday and Doran and is now published by Henry Holt and Company in New York City. It chronicles a season spent living on the dunes of Cape Cod. Beston's "Fo'castle," the 20x16 beach cottage which served as the setting for the book "The Outermost House", was built in June 1925 and then claimed by the sea in February 1978. Beston (born Henry Beston Sheahan in 1888; died 1968) named the cottage "the Fo'castle" because its ten windows and its commanding