File:The Dental cosmos (1891) (14594789027).jpg

Identifier: dentalcosmos3318whit (find matches)
Title: The Dental cosmos
Year: 1891 (1890s)
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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wer in living matter, and, although we have not yet discovered thepower which directs the cells of tissue in the embryo pursuing theirvarious selective courses, yet a study of the progressive changes ofcontour, arrangement, and position manifest in development mustever be interesting to the student of Nature. Doubtless every physician has asked himself the question when apatient has applied to him to relieve an aching tooth, Why cannot theenamel of the tooth be replaced by repair or growth as bone or othertissues? Every surgeon amputates a limb with the assurance thatthe end of the bone will heal over. The fractured limb will uniteunder proper treatment and coaptation of the parts, or in other wordsthe separation of the continuity in bone will be replaced by new bone,but when the enamel of a tooth has been fractured or destroyed thereparative process is wholly wanting, and unless some artificial pro-cess is resorted to the wound increases until the tooth or its usefulnessis destroyed.
Text Appearing After Image:
326 THE DENTAL COSMOS. Close as the analogy may appear to the casual observer, a widedisparity is seen to exist when we study the origin, development, andappearance of each in detail, and it is only when we have followedout this that we can give any valid reasons which will answer theforegoing question. From a few human embryos, and also from several small animals,I have mounted many hundred sections of bone and of the inferiormaxilla which, when contrasted, have suggested the theme of thispaper. These embryos had been preserved in ordinary alcohol, someof them for several years. The part which I wished to study, as forinstance the lower jaw, was carefully dissected out by cutting fromthe angle of the mouth through the cheek directly back to the ramusand disarticulating from the temporal bone, then dividing at the sym-physis mentis and removing the tongue ; each part was placed inborax-carmine staining fluid for twenty-four hours, then into the dis-charging fluid for twenty-four hours

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