. Dental and oral radiography; a textbook for students and practitioners of dentistry . to obtainradiograms of large areas. Not only can larger areas beobtained by this method, but locations and structures in-accessible to the small films are reached and their imagesaccurately and clearly recorded upon the larger , the advantage of this method is well founded. The technic is simple when once mastered, but must beadhered to accurately if the results are to be dependedupon for diagnosis. In using the extra-oral method, large DENTAL AND OltAL llADIOGRAPIIY TECHNIG 93 plates or fil
. Dental and oral radiography; a textbook for students and practitioners of dentistry . to obtainradiograms of large areas. Not only can larger areas beobtained by this method, but locations and structures in-accessible to the small films are reached and their imagesaccurately and clearly recorded upon the larger , the advantage of this method is well founded. The technic is simple when once mastered, but must beadhered to accurately if the results are to be dependedupon for diagnosis. In using the extra-oral method, large DENTAL AND OltAL llADIOGRAPIIY TECHNIG 93 plates or films are used and the areas desired are broughtin as close contact as possible with the plate, hy pressingor resting the side or portion of the face upon tvhichthe structures desired are located, against the plate. First of all, the patient must be placed in a position sothat the head can he held perfectly still. The dental chairwith a few adjustments offers an excellent means foraccomplishing this. One of the chair arms is lowereddown against the side of the chair or removed, and the. Fig. 46.—The headrest of the dental chair with its many adjustments can easily bearranged so that the patients head may rest easily and firmly upon it. patient placed sideways in the chair. The chair back isadjusted so that the patient lies against it in an easyposition, and the headrest wings are adjusted so as tolie flat and thereby form an excellent resting x)lace for theplate. The headrest with its many possible adjustmentscan easily be placed so that the patients head rests easilyand firmly upon the plate, rendering it an easy matter toremain perfectly quiet. This position is shown in 94 DENTAL AND OKAL EADIOGRAPHY
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradiogr, bookyear1919
