. Elementary and dental radiography / by Howard Riley Raper . n the middle is seen in use in Fig. 102. The tube should not be tipped as in Fig. 107 when the incline planeis used: When the incline plane is used direct the rays straight down-ward. Figure 109 is the radiograph made from the pose shown in Fig. ic8. As has been indicated in Figs. 107 and 108, extra-oral dental radio-graphs may be made with the patient lying on a table or seated on a chairor stool with the head placed on a stand or table. Figure no illustrates-a special tube stand attachment on which the head may be placed. Figure M
. Elementary and dental radiography / by Howard Riley Raper . n the middle is seen in use in Fig. 102. The tube should not be tipped as in Fig. 107 when the incline planeis used: When the incline plane is used direct the rays straight down-ward. Figure 109 is the radiograph made from the pose shown in Fig. ic8. As has been indicated in Figs. 107 and 108, extra-oral dental radio-graphs may be made with the patient lying on a table or seated on a chairor stool with the head placed on a stand or table. Figure no illustrates-a special tube stand attachment on which the head may be placed. Figure MAKING DENTAL RADIOGRAPHS 117 no also illustrates a device for holding the head immovable. The writerprefers the reclining position, however, when sufficient office space willpermit the use of a table. While satisfactory radiographs of the loweranterior teeth (see above) may be made on platesplaced extra-orally, sufficiently clear radiographs of the upper teeth cannot be obtained by any means thus far devised, on plates so placed. Pose for theAnterior Fig. 107. „ . _ There is such similarity in the symptoms caused Poses for the Cranial . , , , , . , .. J , J. , ,. e Sinuses and P*lls ^ dental lesions and those produced by diseases of the cranial sinuses and cells that the radiodontist is not infrequently called upon to make a differential diagnosis. The cranial sinuses and cells are (1) the maxillary sinuses, or antra, (2) the frontal sinuses, (3) the ethmoid cells, (4) the sphenoid cells and (5) the mastoid cells. With the patients face placed against the sensitive side of the plate, Fig. in illustrates a standard pose for making radiographs to give an u8 DENTAL RADIOGRAPHY
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