File:Elementary and dental radiography (1913) (14570679407).jpg

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Identifier: elementarydental00rape (find matches)
Title: Elementary and dental radiography
Year: 1913 (1910s)
Authors: Raper, Howard Riley, 1886-1978
Subjects: Radiography, Dental
Publisher: New York, Consolidated dental mfg. co. (etc., etc.)
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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nd 12 inches. Dis-tance between glass of tube and patients face, about 7 inches. 5. Thickness of part: That of superior maxillary bone and overly-ing tissues. 6. Density of part: That of superior maxillary bone and overlyingtissues. 7. Film used: Ilford X-ray film. 8. Time of exposure: Ten (10) seconds. 9. Time in developer: Five (5) minutes in M. Q. developer.Comment: Flow can a tube backing up 6 inches of parallel spark be operated by a coil the terminals of which are only 6 inches apart?is a natural and fair question. This is accomplished by placing an up-right piece of plate-glass between the terminals of the coil, which pre-vents sparking between them. With conditions as above, an exposure of about 20 seconds is neces-sary when Eastman films are used. Be it understood that (O seconds for Ilford films and 20 seconds forEastman films do not represent the minimum exposures for the makingof dental radiographs under the conditions as above. For example, I MAKING DENTAL RADIOGRAPHS 127
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rig. 115. Arrow A points to an unerupted lower third molar. Arrow B points to the temporo-mandibular articulation, which shows very clearly in this radiograph. The triangular spotmarked C is the result of not completely covering the plate immediately when it was placed in the developer. I28 DENTAL RADIOGRAPHY was able to obtain a tolerably good radiograph after a io-seconds ex-posure on an Eastman film by leaving it in the developer 14 minutes. Toobtain the best pictures, however, the exposure should be 10 seconds forIlford film- and 20 seconds for Eastman films. To make the negative of the radiograph shownfig. 113. in Fig. 113 the conditions were as follows: 1. Machine used: Same as for Fig. 112. 2. Strength of current: Same as for Fig. 112. 3. Make and condition of tube: Same as for Fig. 112. 4. Distance of target from plate: Between 12 and 13 inches. Dis-tance of glass of tube from patients face and neck, 6 inches. Posesimilar to Fig. 102. 5. Thickness of part: That of tissues of t

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  • bookid:elementarydental00rape
  • bookyear:1913
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Raper__Howard_Riley__1886_1978
  • booksubject:Radiography__Dental
  • bookpublisher:New_York__Consolidated_dental_mfg__co_
  • bookpublisher:__etc___etc__
  • bookcontributor:Columbia_University_Libraries
  • booksponsor:Open_Knowledge_Commons
  • bookleafnumber:138
  • bookcollection:medicalheritagelibrary
  • bookcollection:ColumbiaUniversityLibraries
  • bookcollection:americana
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27 July 2014
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