File:The Dental cosmos (1891) (14778912134).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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on-foci, and finally to a complete destruction ofthe tissue (Fig. i). A higher power of the microscope (350-1200) showed that thedecay was caused by a so-called mixed infection, not only micrococci,as in Fig. 2, but in some places bacilli and even very long, muchtwisted and contorted threads being present (Fig. 3). The con-. tortion of these threads resulted simply from the contracted space in DECAY OF A REPLANTED TOOTH. 255 which their development took place, and not from any natural ten-dency of the threads to take this shape. The preparations also showed the fragmentation of the tubules orbreaking up into short pieces, resembling pipe-stems. It is much tobe hoped that some satisfactory explanation of the origin of thisappearance will soon be furnished. As much as has been writtenabout them, we are still absolutely unable to account for them. Wehave thus far only succeeded in showing that they are not the result ofany vital action, since they occur in artificial caries also. Fig. 2.
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A small portion of the preparation shown in Fig. 1 highly magnified, showing the distentionof the tubules by micrococci. 1100:1. We find, consequently, by the examination of this case of decay ofa replanted tooth, that the same chemical, physical, and structuralchanges have taken place as in the ordinary cases of decay met withevery day. We also find the same agents, viz, bacteria, at work in bringingabout these changes. Wherever and under whatever conditionsdecay of dentine has been the object of exact study, the same pheno- 256 THE DENTAL COSMOS. mena and the same etiological factors have been found, and the massof evidence already heaped up in favor of the chemico-parasitical Fig. 3.

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