. Elementary and dental radiography / by Howard Riley Raper . Fig. 419C. Two central incisors in the 9ame mouth. The posts in the two centrals pass through perforations, one to the labial, one to the lingual. The two radiographs respectively both show and f;il to show the post? passing through the perforations. READL\G RADIOGRAPHS 177 Figure 420 shows a wire apparently following the canal in a lowerbicuspid. Figure 421 is of the same tooth and wire, but made at a dif-ferent angle; the wire seems to be too far distally. In reality it is toofar buccally. Study Figure 422. 19. To Mistake a Canal
. Elementary and dental radiography / by Howard Riley Raper . Fig. 419C. Two central incisors in the 9ame mouth. The posts in the two centrals pass through perforations, one to the labial, one to the lingual. The two radiographs respectively both show and f;il to show the post? passing through the perforations. READL\G RADIOGRAPHS 177 Figure 420 shows a wire apparently following the canal in a lowerbicuspid. Figure 421 is of the same tooth and wire, but made at a dif-ferent angle; the wire seems to be too far distally. In reality it is toofar buccally. Study Figure 422. 19. To Mistake a Canal Filling Passing Into a Crooked RootFor a Canal Filling Material Passing Through a PerforationThrough the Side of the Root. Figure 423 shows canal filling material passing into a crooked buccalroot of an upper first bicuspid. The outline of the buccal root cannot be
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