. Dental and oral radiography : a textbook for students and practitioners of dentistry . A. B. Fig. 61.—The radiographic appearance of the teeth and their surrounding struc-tures under normal conditions are here shown. A, upper bicuspids and molars; B,lower molars. ous degrees of density, depending upon their thickness.(See Fig. 61.) In examining a radiogram, it is essential that theoriginal plate or film only be used, and this should beexamined carefully and in a proper light, if the maximumamount of information is to be obtained from it. This is best accomplished by utilizing some sort ofill
. Dental and oral radiography : a textbook for students and practitioners of dentistry . A. B. Fig. 61.—The radiographic appearance of the teeth and their surrounding struc-tures under normal conditions are here shown. A, upper bicuspids and molars; B,lower molars. ous degrees of density, depending upon their thickness.(See Fig. 61.) In examining a radiogram, it is essential that theoriginal plate or film only be used, and this should beexamined carefully and in a proper light, if the maximumamount of information is to be obtained from it. This is best accomplished by utilizing some sort ofilluminating box or cabinet from which varied degreesof light are obtainable. The face of such a cabinetshould be covered with ground glass, so that the lighttransmitted will be equally distributed and free fromshadows. As a radiogram is a transparency, a dim light INTERPRETATION OF RADIOGRAMS 125 behind it will bring out one set of shadows to theirgreatest clearness. An increase in the light will showforth still other effects; while a high degree of illumina-tion will bring out the m
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