. Dental and oral radiography : a text book for students and practitioners of dentistry . Fig. 53. A cuspid tooth lying against the anterior wall of the antrum. It will benoted that the cuspid is inverted in its position. Such a mount should preferably be made ofcelluloid with one side clear and the other sidedull, which allows the light transmitted to be of 132 DENTAL AXD ORAL RADIOGRAPHY the same character as that coming through groundglass. In examining negatives, we should bear in mindthe fact that very dense tissues are characterisedby white areas, while less dense tissues appeardarker, a
. Dental and oral radiography : a text book for students and practitioners of dentistry . Fig. 53. A cuspid tooth lying against the anterior wall of the antrum. It will benoted that the cuspid is inverted in its position. Such a mount should preferably be made ofcelluloid with one side clear and the other sidedull, which allows the light transmitted to be of 132 DENTAL AXD ORAL RADIOGRAPHY the same character as that coming through groundglass. In examining negatives, we should bear in mindthe fact that very dense tissues are characterisedby white areas, while less dense tissues appeardarker, and the absence of tissue is indicated byblackness. To avoid confusion, we should remem-ber that in prints and lantern slides this colorspectacle is Fig. 54. A supernumerary second bicuspid. Upon the extraction of the secondbicuspid in place at the time the radiograph was made the supernumeraryerupted, and was found to be typical in size and form. Assuming now that we are familiar with thenormal appearance of the dental structures un-der the x-ray, let us now consider some of thevariations from their normal appearance whichare found in the presence of pathological condi-tions. As a tooth is much more dense than the bonystructures of the jaw, any anomaly of form, size INTERPRETATION OF RADIOGRAPHS 133 or position in the jaws is easily discernible eventhough it occupy a position far from what mighthe expected, as for instance, in the case of im-
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