. Dental and oral radiography : a textbook for students and practitioners of dentistry . Fig. 64. Fig. 65. Fig. i4.—An alveolar abscess involving the roots of an upper central incisor andlateral incisor. No root canal fillings are present in either tooth. Fig. 65.—There is evidence of a small alveolar abscess about the apex of theroot of the first bicuspid, while a larger one is shown to exist about the apex ofthe second Fig. 66.—Large alveolar abscess about the root of a lower first bicuspid. One of the most characteristic alterations or changesin the tissues to he noted in
. Dental and oral radiography : a textbook for students and practitioners of dentistry . Fig. 64. Fig. 65. Fig. i4.—An alveolar abscess involving the roots of an upper central incisor andlateral incisor. No root canal fillings are present in either tooth. Fig. 65.—There is evidence of a small alveolar abscess about the apex of theroot of the first bicuspid, while a larger one is shown to exist about the apex ofthe second Fig. 66.—Large alveolar abscess about the root of a lower first bicuspid. One of the most characteristic alterations or changesin the tissues to he noted in the radiogram, is that to befound where an alveolar abscess is present. We knowthat when such an abscess takes place there is alwaysan accompanying destruction of the cancellous bone tissue In this text positive prints have been used so as to reproduce as nearly as pos-sible the color spectacle of radiograms. INTERPRETATION OF RADIOGRAMS 129 at the immedite seat of the inflammatory process. Know-ing that the absence of tissue is indicated in the radio-gram by a dark or black area, such an area if locatedat the apex of a devitalized tooth, or about a root or frag-ment of a root, would indicate the presence of an alve-olar abscess. In fact, where these dark areas are foundin the alveolar process, and are not natural cavities, suchas the antrii, or nasal cavities, or such well-defined nerve
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