. Elementary and dental radiography . Fig. 347. Impacted lower, left, third molar, viewed from the lingual. The screw and nut ofthe clamp band are on the Fig. 848. 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 win- around its neck can Ite seen clearly. The wire is twisted on the labial. the plate or film the clearer n is outlined in the radiograph. Like-wise a- we look Upon a -ceiie. the closer objects are clearer than those ata distance. Hence; when we observe a stereoradiograph from the posit
. Elementary and dental radiography . Fig. 347. Impacted lower, left, third molar, viewed from the lingual. The screw and nut ofthe clamp band are on the Fig. 848. 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 win- around its neck can Ite seen clearly. The wire is twisted on the labial. the plate or film the clearer n is outlined in the radiograph. Like-wise a- we look Upon a -ceiie. 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 la- closer to us are clearer, while those farther away areless clear. If the film packets used contain two films each, four negatives will]» mad-, and these may be mounted on clear glass, so that the operator STEREOSCOPIC RADIOGRAPHY 3*3 may observe the part from the position of the film and tube also. In direct proportion as tilings are large or smallit is easy or difficult to discern perspective. Theparts in dental radiographs are so small that it isdifficult t
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