. Dental and oral radiography; a textbook for students and practitioners of dentistry . Fig. 44.—The Dorr film holder with detachable Fig. 45. arch, and the ends of the lines coming from the numbersshow the position of the mesial and distal edges of thefilm used for each exposure. It mil be noted that eachadjacent film position overlaps its neighbor which is ad-visable so that no area is left out. In making radiograms of the anterior part of the arch,it is a mistake to attempt to radiograph more than two 92 DENTAL AND ORAL EADIOGRAPHY or three teeth at a tmie, as the curvature of the
. Dental and oral radiography; a textbook for students and practitioners of dentistry . Fig. 44.—The Dorr film holder with detachable Fig. 45. arch, and the ends of the lines coming from the numbersshow the position of the mesial and distal edges of thefilm used for each exposure. It mil be noted that eachadjacent film position overlaps its neighbor which is ad-visable so that no area is left out. In making radiograms of the anterior part of the arch,it is a mistake to attempt to radiograph more than two 92 DENTAL AND ORAL EADIOGRAPHY or three teeth at a tmie, as the curvature of the archusually renders it impossible to get more than that num-ber free from distortion. Another point in technic which should not be over-looked if sharp outlines are to be obtained, is the one inregard to having the tube placed at the proper distancefrom the structures to be radiogaphed. To establish thebest focal distance for work about the teeth or jaws, thetarget of the tube should be about twenty inches from theplate or film. With a good x-ray machine, and a properly regulatedtube, good radiograms can be obtained by very short ex-pos
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradiogr, bookyear1919
