File:The Dental cosmos (1912) (14766654424).jpg

Identifier: dentalcosmos5419whit (find matches)
Title: The Dental cosmos
Year: 1912 (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

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for denialirregularity and impaction. This mustbe before the seventh year, and shouldbe before the fifth or sixth year. Wemay therefore expand the arch to its fulllimit before the seventh year. passed the tests of sufficient growth spacesat five years of age, or before the erup-tion of the incisors and canines, to per-mit the eruption of incisors and caninesanterior to the deciduous molars andwithout lateral contact until after occlu-sion ; also the deciduous molar spaceswere maintained to permit the eruptionof the bicuspids to occlusion and then topermit of the mesial movement of thefirst permanent molar prior to the erup-tion of the second molar. All of theseteeth were regularly arranged and thea relies normal. The faces were full,rounded, and normal, and the children BARNES.—DENTAL IMPACTION AND PREVENTIVE TREATMENT. 7 were the best in school. About 35 per feet by general operative dentists, andcent, of the cases examined were so nearly in a prior examination had been so Fig. 7.
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Figs. 7 and 8: Side and occlusal views of a case at five and eleven years in which theexpansion was accomplished with a horizontal hinge expansion arch. The expansionhas been at the expense of the molar positions. The arch is too narrow, and at thirteenyears shows the crowding and twisting of incisors—due to second molar pressure. perfect in many appearances that they classed. These cases presented the evi-would probably have been classed as per- dence of lateral contact eruptions, the 8 THE DENTAL COSMOS. deciduous molar spaces having been util-ized to permit the eruption of caninesand bicuspids without allowing any me-sial movement of the first molars. Inmost of these cases the arches appearedregular and fairly broad, but the teethpressed too tightly together, or there wasexcessive overbite, or both. The archeswere placed too far posteriorly in the H mouth. Each tooth had erupted a littletoo far posteriorly at the expense of thenext posterior tooth. In determining regularity of th

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