. Dental and oral radiography : a text book for students and practitioners of dentistry . Fig. arrangement of the ap] - reparatory to seating the patient. urally arises, how is this to be accomplished with-out superimposing the shadows of one side uponthe shadows of the other side, and thereby pro-ducing a chaotic result. For instance, let us suppose that we wish toobtain a radiograph of the left side of the upper DENTAL AXD ORAL RADIOGRAPHY TECHXIC 97 and lower jaws extending from the cuspid regionin front to the angle of the jaw behind, and fromthe floor of the orbit above to the infe
. Dental and oral radiography : a text book for students and practitioners of dentistry . Fig. arrangement of the ap] - reparatory to seating the patient. urally arises, how is this to be accomplished with-out superimposing the shadows of one side uponthe shadows of the other side, and thereby pro-ducing a chaotic result. For instance, let us suppose that we wish toobtain a radiograph of the left side of the upper DENTAL AXD ORAL RADIOGRAPHY TECHXIC 97 and lower jaws extending from the cuspid regionin front to the angle of the jaw behind, and fromthe floor of the orbit above to the inferior marginof the mandible below. If we are to get a cor-rect shadowgraphic representation of this area,it should be free from the shadows of the oppo-. Fig. 41. The patient seated and the apparatus arranged for making a radiographof the left side. The comfortable position of the patient renders it an easymatter to remain perfectly quiet. site side, and this can only be accomplished bydirecting the rays in such a manner that they willmiss the areas not desired and will pass throughthose we wish to record. In accomplishing this, we must take into con- 98 DENTAL AND ORAL RADIOGRAPHY sideration two structures, viz.: the spine and theascending ramus of the mandible (on the rightside in this instance as the left side is to be radio-graphed) and cause the rays to pass in throughthis opening and thereby reach the desired way in which this is accomplished is shownin Fig. 42, A and B, and Fig. 43, A and B. An important factor in accomplishing this isthe position in which the patients head is heldas it is pressed against the plate. Held in themanner shown, the rays can be made to pass inbetween the ascending ramus of the mandible andth
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