Articulator-2;The Dental cosmos (1914)

Identifier: dentalcosmos5619whit (find matches)

Title: The Dental cosmos

Year: 1914 (1910s)

Authors: White, J. D McQuillen, J. H. (John Hugh), 1826-1879 Ziegler, George Jacob, 1821-1895 White, James William, 1826-1891 Kirk, Edward C. (Edward Cameron), 1856-1933 Anthony, L. Pierce (Lovick Pierce), b. 1877

Subjects: Dentistry Dentistry

Publisher: Philadelphia, S. S. White Dental Manufacturing Co

Contributing Library: Yale University, Cushing/Whitney Medical Library

Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

Text Appearing Before Image:

s that enter into mastication. The size of the triangle of the human jaw, the position of its oscillating points, and the size and shape of the alveolar ridges, are the factors which determine the dimensions of these movements. There is more lateral movement in a mandible with a round archthan in one with a Y-shaped arch. Fig. 1 shows the writers adjustable articulator, which is capable of repro- THE DENTAL COSMOS. ducing all the masticatory movements of the human jaw to their exact and full size. With this articulator the points of anatomical articulation are simple, andthe steps are few. It is hut reasonableto suppose that if we can reproduce uponthe articulator the exact dimensions of line of the mandibular triangle. This is done at the necks of the condyles just back of the lobes of the ears. When this is being done, the patient is requested to open the mouth a little. This throws the necks of the condyles forward and downward, away from the mastoid process, and gives more room for Fig. 1.

Text Appearing After Image:

the masticatory movements of the human jaw, the plates made upon such an articulator will coincide with the human articulator when the plates are placed in the mouth. DETERMINATION OF THE BASE LINE. To accomplish these results, the writerfirst takes the measurement of the base measuring. The instrument for taking this measurement, which consists merely in thimble-pointed calipers, is seen in connection with Fig. 7. The measurement from center to center, at these points, of the necks of the condyles is the same as that from center to center of the condyles proper. This measurement becomes our base line, and is transferred to the articulator, which is ad- DALBEY.—ESSENTIALS OF ANATOMICAL ARTICULATION. 045 justed to this measurement. The condyles, a. a of Fig-. 1, are adjusted to this measurement by the manipulating key, c. a simple matter, and in the majority of cases is all that is necessary. While the triangle is not always an equilateral one, Fig.

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1914

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