Dental and oral radiography : a text book for students and practitioners of dentistry (1916)
McCoy, James David · St. Louis : Mosby · leaf 88
er it is necessary to direct the rays uponstructures which lie at an angle with the plateor film, correct shadows may be obtained by ad DENTAL AXD ORAL RADIOGRAPHY TECHXIC 85 hering to the following rule: Bisect the anglemade by the plane of the object, and the plane ofthe film, and direct the rays… … Fig. 34. The patient can hold the film in position against the upper teeth by-exerting slight pressure with the thumb. sentatioiis of the dental structures. For instance,if the rays are directed from too low a source,the shadows will be lengthened, or if they be di-rected from too high a source,…
Radiography, Dental · X-rays · Teeth · Mouth
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