. Elementary and dental radiography / by Howard Riley Raper . Fig. 347. Impacted lower, left, third molar, viewed from the lingual. The screw and nut ofthe clamp band are on the Fig. 348. Viewed from the position of the film—from the lingual. The temporary cuspid is so much decayed and resorbed it can scarcely be seen. The wire around its neck can be seen clearly. The wire is twisted on the labial. is to the plate or film the clearer it is outlined in the radiograph. Like-wise as we look upon a scene, the closer objects are clearer than those ata distance. Hence, when we observe a st
. Elementary and dental radiography / by Howard Riley Raper . Fig. 347. Impacted lower, left, third molar, viewed from the lingual. The screw and nut ofthe clamp band are on the Fig. 348. Viewed from the position of the film—from the lingual. The temporary cuspid is so much decayed and resorbed it can scarcely be seen. The wire around its neck can be seen clearly. The wire is twisted on the labial. is to the plate or film the clearer it is outlined in the radiograph. Like-wise as we look upon a scene, the closer objects are clearer than those ata distance. Hence, when we observe a stereoradiograph from the positionof the film or plate during its exposure, those parts of the stereoradio-graph seeming to be closer to us are clearer, while those farther away areless clear. If the film packets used contain two films each, four negatives willbe made, and these may be mounted on clear glass, so that the operator 3H DENTAL RADIOGRAPHY may observe the part from the position of the film and tube also. In direct proportion as things are large or smallenlargement ^ 1S easy or difficult to discern perspective. The Of Dental parts in dental radiographs are so small that
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