The Dental cosmos (1912) (14789107853)

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



Text Appearing Before Image:
lary arches and superimposed nasalstructures, we may infer that whateverinterferes with development in one ofthese regions will interfere with develop-ment in the other, and, conversely, what-ever assists in the development of one ofthese regions will assist in the develop-ment of the other. It is a matter of everyday practice inorthodontia to expand the dental arches,and by so doing to increase the develop-ment of the maxillary arches, hence, evenwithout further argument, it can be as- PULLEN.—EXPANSION OF THE DENTAL ARCH. 5 1 5 sumed that the nasal structures and si-nuses directly above the maxillary regionreceive at the same time an impetus tofurther development. Again, when the early age at whichorthodontic treatment should be begun is and the face increases in proportion to the size of the cranium more rapidlyduring childhood, so that the ratio attwo years stands as 1:6, at five years as1: 4, at ten years as 1: 3. and in the adultas 1: 2, the resultant beneficial effects of Fig.
Text Appearing After Image:
—Xoyes. Section of face exhibiting the approximation of developing permanent teeth to the base of the nasal structures. taken into account the amount of addedgrowth in the whole face, in response toartificial stimulation through expansionof the maxillary arches, can be assuredlvanticipated. For example, if in the skullat birth (Fig. 6) the relative propor-tions of the face and cranium are as 1: 8. expansion of the dental arch between theages of approximately four and ten yearsare sure to be assisted by nature herselfduring these years of rapid downwardgrowth of the face at a time when thebony tissues are most impressionable.In a further study of some important 516 THE DENTAL COSMOS. anatomical considerations in regard to the growing tissues of the internal face,we can find added support for our beliefin the direct assistance to developmentof the internal and external face throughearly expansion or development of thedental arches. closely the wall of the antrum. Thecrowns of the bicus