. Dental and oral radiography : a text book for students and practitioners of dentistry . way between buccal roots and lin-gual root, and the rays are passed in perpendicu-larly to the plane lying midway between this as-sumed plane and the film. In the resulting radio-graph none of the roots will appear in their exactproportions, but the buccal roots will be slightlyshortened, while the lingual root will be slightlylengthened. When it is desirable to obtain a radiograph ofthe buccal roots in their exact length, they mustbe assumed as being the plane of the tooth (B)and the rays must pass in pe
. Dental and oral radiography : a text book for students and practitioners of dentistry . way between buccal roots and lin-gual root, and the rays are passed in perpendicu-larly to the plane lying midway between this as-sumed plane and the film. In the resulting radio-graph none of the roots will appear in their exactproportions, but the buccal roots will be slightlyshortened, while the lingual root will be slightlylengthened. When it is desirable to obtain a radiograph ofthe buccal roots in their exact length, they mustbe assumed as being the plane of the tooth (B)and the rays must pass in perpendicularly to aplane lying midway between them and the this event, the image of the lingual root iselongated. If the lingual roots are under scrutiny (C)they must be considered the plane of the teeth,and the rays passed in perpendicularly to a planelying midway between the lingual root and thefilm. In this event, the image of the Ungual rootwill have its correct pro portions, but the imageof the buccal roots will be slightly shortened. DENTAL AND ORAL RADIOGRAPHY TECHX1C 89. 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 srained.
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectradiographydental
