Identifier: etiologyofosseou00talb (find matches)
Title: The etiology of osseous deformities of the head, face, jaws and teeth
Year: 1894 (1890s)
Authors: Talbot, Eugene S. (Eugene Solomon), 1847-1924
Subjects: Head Face Jaw Tooth Abnormalities
Publisher: Chicago, Keener
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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,and where two teeth are widely separated, the width of thesepta naturally corresponds to the space between the teeth. The sockets are lined with a thin plate of compact bonysubstance, extending from the outer and inner plate of thealveolar process to the apex, where there are small openingsfor the entrance of nerve and blood-vessels for the nourish-ment of the teeth. This bony plate has upon its inner surface the elastic peri- THE HEAD, FACE, JAWS AND TEETH 101 dental membrane, which acts as a cushion for the teeth,while upon the inner surface it is surrounded by spongybone. The teeth are held firm in their alveolar sockets by a unioncalled gomphosis, which resembles the attachment of a nailin a board. Teeth with one conical root, and those with twoor more perpendicular roots, are retained in position by anexact adaptation of the tissues. Teeth having more than oneroot, and those bent or irregular, receive support from allsides by reason of their irregularity. The teeth are also held
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Pig. 21 in position by the peridental membranes. Fig. 21 illustratesthe position of the teeth in the jaws. The peridental mem-brane lines the alveolus and covers the roots of the teeth. Itis a fibrous tissue, which admits of a slight motion of theteeth, and acts as a cushion to protect the jaws from severeblows and concussions while in the act of tearing and grind-ing food. After the removal of the permanent teeth the alveolar pro-cess is entirely absorbed. Fig. 22 shows how absorption takesplace. The teeth have all been removed from the superiormaxilla, as has also the alveolar process. The molars on thelower jaw have been extracted, and absorption of the alveolar 102 ETIOLOGY OF OSSEOUS DEFORMITIES OF process has resulted, showing a marked contrast in connec-tion with the anterior alveolar process, which remains intactand holds the teeth lirmly in place. Thus it will be observed,from the changes which occur from the first development ofthe teeth to their final extraction, that the a

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