. Dental and oral radiography : a textbook for students and practitioners of dentistry . c. d. Fig. 81.—A, showing condition present; B, diagnostic wires inserted; C, root canals filled; D, resection of roots. portant where roots have been the seat of periapical in-fections prior to the time when treatment was inaugu-rated. (See Figs. 78, 79 and 80.) Radiographic Requirements.—Intra-oral radiogramsexclusively should be used for this work. An excep-tion might be made in the case of the lower molars andbicuspids, if the tissues under the tongue are sufficiently 1G2 DENTAL AND ORAL RADIOGRAPHY te

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. Dental and oral radiography : a textbook for students and practitioners of dentistry . c. d. Fig. 81.—A, showing condition present; B, diagnostic wires inserted; C, root canals filled; D, resection of roots. portant where roots have been the seat of periapical in-fections prior to the time when treatment was inaugu-rated. (See Figs. 78, 79 and 80.) Radiographic Requirements.—Intra-oral radiogramsexclusively should be used for this work. An excep-tion might be made in the case of the lower molars andbicuspids, if the tissues under the tongue are sufficiently 1G2 DENTAL AND ORAL RADIOGRAPHY tender to make the placing of the films for exposure ahardship to the patient. Excellent extra-oral radio-grams of this area may be obtained, providing the opera-tor has the ability and constancy to master the neces-sary technic. Root Resection Where root resection is contemplated, the intelligentdentist should first obtain accurate radiograms of the

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