File:The Dental cosmos (1891) (14594717098).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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is sudden appearanceof tubules is the most difficult problem connected with the study ofpulp-nodules. As already stated above, llohl easily disposes of the question byassuming that new odontoblasts may arise in any part of the pulp ;Bruck, by the assertion that true dentine may be formed by any cellof the pulp whatever ; particularly the stellate cells are claimed to beoften concerned in the production of nodules. Witzel assigns to the spindle-cells the power to form tubules, andWeil transforms the spindle-cells into odontoblasts and finds, in con- ANATOMY AND PATHOLOGY OF THE TUSKS OF THE ELEPHANT. 437 formity with the views of Hohl, in the formation of pulp-nodules ananalogous process to the formation of normal dentine. While assenting to the statement that any cell of the pulp mayproduce appearances resembling dentinal tubules, I must decidedlyoppose the view that any cell may form true dentine. I also agreewith Witzel that spindle-cells may form long narrow spaces in the Fir,. 69.
Text Appearing After Image:
From a preparation of pathological ivory. Showing how the spindle-cells of the pulp may-give rise to appearances, as at a, very much resembling dentinal tubules. 70 : 1. dentine bearing a certain resemblance to tubules, as seen in Fig. 69,but that those spaces are tubules has not yet been proved. Of allwho have attempted to account for the formation of dentinal tubules,independently of the action of the membrana eboris, it appears to methat Weil comes nearest to establishing his point, and yet the illustra-tion which he gives, particularly Fig. 3 of his article, is not conclu-sive ; it produces an impression rather of developing bone than ofvol. xxxiii.—32 438 THE DENTAL COSMOS. developing dentine, although, as Weil very properly suggests in aprivate communication, osteoblasts and odontoblasts often presentvery similar appearances under the microscope. Preparations obtained from the pulp of the elephant do not teachus much in reference to this point, because the long process of dryi

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