File:Interpretation of dental and maxillary roentgenograms (1918) (14754894291).jpg

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Identifier: interpretativyr (find matches)
Title: Interpretation of dental & maxillary roentgenograms
Year: 1918 (1910s)
Authors: Ivy, Robert Henry, 1881-1974
Subjects: Teeth Radiography Dentistry
Publisher: St. Louis : C. V. Mosby company
Contributing Library: West Virginia University Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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Fig. 19.—High power view of epithelial cyst lining. 44 (NTERPRETATION OF ROENTGENOGRAMS mally in the peridental membrane, where they are knownas debris epitheliaux paradentaires of Malassez. Theseepithelial cells are believed to be remains of the outer cells of the enamel organ which originally passed downand formed the outer wall of the sac in which the cemen-of the root was formed. Proliferation of these nm epithelial cells found among- the granulation tissue isstimulated by the chronic inflammatory process. The
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Fig. 20.—Later stage of cyst formation, showing pressure atrophy of epithelial lining. mass of epithelium then breaks down in the center, it isbelieved by fatty degeneration, and a space is formedcontaining fluid (Figs. 18 and 19). This cyst cavity grad-ually enlarges, the pressure of the fluid causing atrophyof the epithelial cells, until the wall of the cyst consistsof a dense fibrous capsule lined with at most a few layersof epithelial cells (Fig. 20). All traces of epithelium mayfinally disappear. The cyst fluid is usually clear, straw- PATHOLOGY AND DENTAL ROENTGENOLOGY 45 colored, and may contain cholesterin crystals, recognizedby their rectangular shape with a notch in one angle. Thefluid is generally sterile, but infection of the cyst wallmay convert it into pus from which various organismsmay be recovered. Dental root cysts may vary con-siderably in size, from that of a small pea to a hens egg(Figs. 217 and 243). In the maxilla, they may invade themaxillary sinus or the nas

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  • bookid:interpretativyr
  • bookyear:1918
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Ivy__Robert_Henry__1881_1974
  • booksubject:Teeth
  • booksubject:Radiography
  • booksubject:Dentistry
  • bookpublisher:St__Louis___C__V__Mosby_company
  • bookcontributor:West_Virginia_University_Libraries
  • booksponsor:LYRASIS_Members_and_Sloan_Foundation
  • bookleafnumber:47
  • bookcollection:west_virginia_university
  • bookcollection:americana
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27 July 2014

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