. Dental and oral radiography : a text book for students and practitioners of dentistry . The structures at the median line including the incisors, both above andbelow, may be secured in this way. the plate. The patient is instructed to keep themouth closed with the teeth together in their nat-ural occlusion. They should also be warned as tothe approximate length of time the exposure willrequire, and that they must remain the more powerful types of apparatus, 106 DENTAL AND ORAL RADIOGRAPHY extra-oral radiographs require but short ex-posures, but if an operator does not pos
. Dental and oral radiography : a text book for students and practitioners of dentistry . The structures at the median line including the incisors, both above andbelow, may be secured in this way. the plate. The patient is instructed to keep themouth closed with the teeth together in their nat-ural occlusion. They should also be warned as tothe approximate length of time the exposure willrequire, and that they must remain the more powerful types of apparatus, 106 DENTAL AND ORAL RADIOGRAPHY extra-oral radiographs require but short ex-posures, but if an operator does not possess highpower apparatus, he should not hesitate to usethis method, as a patient properly seated and sup-ported, as shown in Fig. 41, can easily remain. Fig. 49. In following the technic illustrated in Fig. 48 the patients head should besupported by a bandage of gauze to insure perfect immobility. quiet for five or ten seconds, or perhaps evenlonger, should it be necessary. In making a complete radiographic examina-tion of the teeth, the maxilla and mandible, theauthor suggests the following procedure. Extra-oral radiographs should be made of each side,using the technic illustrated in Figs. 42, 43 and DENTAL AND ORAL RADIOGRAPHY TECHNIC 107 47. This would mean two plates for each by the use of the intra-oral films, the regionlying between the cuspids both above and below,should be radiographed. These plates and filmsshould then be developed and examined. If theprocedure has been carried out with due regardfor all the elements involved, the result shouldconstitute a general radiographic survey of theteeth, the maxilla and the mandible. Should anyof the plates or films exposed fail to result ingood radiographs, additional expo
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