File:The Dental cosmos (1890) (14778827752).jpg

Identifier: dentalcosmos3218whit (find matches)
Title: The Dental cosmos
Year: 1890 (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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infiltration what-ever. (See Fig. 1.) No. 5. Section near open end decayed ; section near apex showsabout one-fourth of the canals infected with straggling cocci to a depthof one-fourth to one-half millimeter. No. 6. The end section is slightly decayed and correspondingly in-fected. The section near the apex is protected on one side by tube-less dentine ; on the other side eighteen tubules are infected by a fewstraggling bacilli to a depth of one-half to three-fourths millimeter(Fig. 3). A few of the tubules contain also cocci (Fig. 3, a, d), fromwhich we must conclude either that the dentine is infected with twokinds of bacteria or with a pleomorphous bacterium. No. 7. The root in this case contained an inflamed pulp ; no traceof tubular infection is anywhere to be discovered. DECOMPOSITION OF CONTENTS OF DENTINAL TUBULES, ETC. 353 No. 8. Section from about middle of root ; twenty-six of the tubulesare infected with cocci to a depth of about one-tenth millimeter. (SeeFig. 4-) Fig. 2.
Text Appearing After Image:
Fig. 2.—Cross-section of the posterior root of a lower molar, showing the advance of decayfrom the canal. 20 : 1. No. 9. The sections show again that the canal is in part lined withmodified dentine. In two or three tubules only was I able to findabout a dozen bacteria. The root was abscessed.vol. xxxii.—26 354 THE DENTAL COSMOS. No. 10. The canal was found filled with masses of bacteria (seeFig. 5), but no infection of the tubules worth mentioning could bedetected, only a few cocci being visible in three or four tubules. Thecanal was again partly lined with modified dentine. Root abscessed. No. 11. Abscessed root. Section near the pulp-chamber showsnearly all the tubules infected to the depth of one-tenth to one-fourthmillimeter. Section near apex free from infection. No. 12. Ground section from near the middle of the root ; no infec-tion of the tubules whatever. Nos. 13 and 14. Both partially protected by modified dentine, andboth free from infection. Fig. 3. Fig. 4. IS ijriili a

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