. Dental and oral radiography : a text book for students and practitioners of dentistry . Fig. for the upper molar teeth. 90 DENTAL AND ORAL KAlh m JKAPHY The upper molars are by all means the mostdifficult teeth to radiograph. That is. to obtainradiographs which are as comprehensive as thosemade of the other teeth. However, by going tothe extra work entailed by the foregoing proced-ure, valuable radiographic information can of-tentimes he Fig. 57. The patient can hold the film in position against the lower tee-exerting slight pressure with the finger. With the lower teeth
. Dental and oral radiography : a text book for students and practitioners of dentistry . Fig. for the upper molar teeth. 90 DENTAL AND ORAL KAlh m JKAPHY The upper molars are by all means the mostdifficult teeth to radiograph. That is. to obtainradiographs which are as comprehensive as thosemade of the other teeth. However, by going tothe extra work entailed by the foregoing proced-ure, valuable radiographic information can of-tentimes he Fig. 57. The patient can hold the film in position against the lower tee-exerting slight pressure with the finger. With the lower teeth | Pig. 37) we do not have this difficulty to contend with to so great a de-_ ee, as the films can he placed for the most partin such a position that they lie parallel to the Ions:axis of the teeth, and the rays ran be directed ina perpendicular direction both to the plane of theteeth and the plane of the film. DENTAL .VXD ORAL RADIOGRAPHY TECHXIC 91 Lu placing the films in the mouth preparatoryto making radiographs of the lower teeth, diffi-culty is sometimes encountered, owing to the factthat the tissues are usually quite sensitive. In-asmuch as the lilm must be \ ssed well down be-tween the tongue and the teeth, it is advisable tofirst see that no sharp corners exist on the filmcovering, or better still, provide a rubber envel-ope or film holder which has no sharp cur,.Such an envelope is easily improvised by the useof ordinary black vulcanite robbe
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