The Dental cosmos (1912) (14582521850)

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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tion 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 tothe 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 bicuspids are inclosedwithin the roots of the deciduous molars,so that the lateral movement of expansionof the deciduous molars must carry thesebicuspid crowns buccally, and thus ma-terially assist in the development of the
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For example, the relative approxima-tion of ilie developing- permanent teethto the base of the nasal structures, asshown in Pig. 7, would indicate that anystimulation to developmeni of these teeth,in cases where an undeveloped dentaland maxillary arch is anticipated, willexerl its developmental influence at leastupon the approximating tissues of thenasal cavities and the internal sinuses. The crown of the central incisor closelyapproximates the Hour of the nasal cham-bers; the canine lies no1 far distanl bu1a little higher up, approaching more dental and maxillary arches, and of theclosely approximating structures of thenose and internal face. The histologist gives us added supportfor our belief in the extensive develop-mental influence of expansion of thedental arch. Dr. F. B. Noyes, in theAmerican Orthodontist for May 1908,says: Bone is formed and re-formed inresponse to mechanical stimuli, and theentire surface is arranged in harmonywith the mechanical stresses which resultfrom the