File:Physiology, hygiene and sanitation, an elementary textbook of physiology, with special attention given to hygiene and sanitation (1919) (14761968941).jpg

Identifier: physiologyhygien00heiz (find matches)
Title: Physiology, hygiene and sanitation, an elementary textbook of physiology, with special attention given to hygiene and sanitation
Year: 1919 (1910s)
Authors: Heizer, W. L. (W. Lucien), b. 1880
Subjects: Physiology Hygiene Sanitation
Publisher: Louisville, Ky., C.T. Dearing Printing Co., Incorporated
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Fig -Showing- how the permanent teeth displacethe temporary ones. dition calls for immediate treatment by a dentist untilthe trouble is relieved. When teeth are so badly neglected that some of themhave been extracted, or pulled, a dentist may be ableto fill the gap with false teeth by means of a bridge.This restores the function of the teeth and if the frontteeth have been lost so that bridges may not be employed, 132 PHYSIOLOGY, HYGIENE AND SANITATION a plate containing one or several teeth may be madeby the dentist. If, for any reason, all of the teeth in theupper or lower jaw, are lost, a set of false teeth canbe used. False teeth should be secured only as a last re-sort for they are not sightly, interfere with speech, becomefoul quickly and require frequent cleansing.
Text Appearing After Image:
Figr. 53.—A properly equipped dentists office. Summary The teeth are important organs of digestion beingused to help reduce coarse foods to a liquid ready for ab-sorption. The temporary teeth, twenty in number, begin to maketheir appearance during the first year of life and areusually displaced at the age of twelve by the permanentteeth, thirty-two in number. The crown, root, and body compose a tooth which iscovered on its exposed surface with enamel. The gumscover the body of a tooth and its root is firmly cemented THE TEETH 133 in the jaw bone. Blood vessels and nerves enter the pulpchamber of a tooth through the root, and are distributedthroughout the tooth to supply it with nourishment. Teeth are shaped for cutting, tearing and grinding foodand are named incisors, canines, bicuspids, and molars.They may be injured by mechanical or violent means ormay decay by the action of bacteria which produce anacid which dissolves their mineral salts. Unless the teethare kept clean, decay re

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