File:Dental and oral radiography - a text book for students and practitioners of dentistry (1916) (14757251165).jpg

Identifier: dentaloral00mcco (find matches)
Title: Dental and oral radiography : a text book for students and practitioners of dentistry
Year: 1916 (1910s)
Authors: McCoy, James David
Subjects: Radiography, Dental X-rays Teeth Mouth
Publisher: St. Louis : Mosby
Contributing Library: West Virginia University Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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ffering the widest range of useful-ness in our work. As stated previously, this isthe method used to obtain radiographs of largeareas. Not only can larger areas be obtained bythis method, but locations and structures inac-cessible to the small films are reached and theirimages accurately and clearly recorded upon thelarger plates. Therefore, the advantage of thismethod is well founded. The technic is simple when once mastered, butmust be adhered to accurately if the results areto be depended upon for diagnosis. In using theextra-oral method, large plates or films are usedand the areas desired are brought in as close acontact as possible with the plate, by pressing orresting the side or portion of the face upon ivhich 94 DENTAL AXD ORAL RADIOGRAPHY the structures desired are located, against theplate. First of all, the patient must be placed in aposition so that the head can be held perfectlystill. The dental chair with a few adjustmentsoffers an excellent means for accomplishing this.
Text Appearing After Image:
Fig. 39. The head rest of the dental chair with its many adjustments can easily bearranged so that the patients head may rest easily and firmly upon it. One of the chair arms is lowered down againstthe side of the chair or removed, and the patientplaced sideways in the chair. The chair back isadjusted so that the patient lies against it in aneasy position, and the headrest wings are ad-justed so as to lie flat and thereby form an excel- DENTAL AND ORAL RADIOGRAPHY TECHNIC 95 lent resting place for the plate. The head restwith its many possible adjustments can easily beplaced so that the patients head rests easily andfirmly upon the plate, rendering it an easy mat-ter to remain perfectly quiet. This position isshown in Fig. 39. Authors Method of Seating the Patient In the authors opinion, there is another meth-od of seating the patient for this character ofwork which necessitates less confusion in the of-fice than the method just described. It is accom-plished by using an ordinary chai

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