. Elementary and dental radiography / by Howard Riley Raper . 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 ope
. Elementary and dental radiography / by Howard Riley Raper . 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 it is StereoradiOgraptJS. difficult to gain perspective. In an effort to over-come this handicap, to an extent at least, Fig. 350was made. Fig. 350 is an enlargement of Fig. 349. Owing to the loss of. Fig. 346. Impacted upper, third molar, viewed from the position of the tube. The wire pass-ing around the neck of the second molar is twisted on the lingual. The impacted tooth sets to the buccal.
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