. Elementary and dental radiography / by Howard Riley Raper . a radiograph, but, bear inmind, perforations made through the side of a root are usually eitherto the mesial or distal. In Fig. 237, observe the central carrying a Tig. 237. Post porcelain crown. The post does not follow the canal. Had the enlargement for it continued in the same direction as was started, the dentist would have penetrated the side of the root. A radiograph of this case would have enabled the operator to see his mistake and correct it. THE USES OF THE RADIOGRAPH IX DENTISTRY 211 This radiograph shows a perforation th
. Elementary and dental radiography / by Howard Riley Raper . a radiograph, but, bear inmind, perforations made through the side of a root are usually eitherto the mesial or distal. In Fig. 237, observe the central carrying a Tig. 237. Post porcelain crown. The post does not follow the canal. Had the enlargement for it continued in the same direction as was started, the dentist would have penetrated the side of the root. A radiograph of this case would have enabled the operator to see his mistake and correct it. THE USES OF THE RADIOGRAPH IX DENTISTRY 211 This radiograph shows a perforation through theTig. 23$. side of the root, to the distal, in an upper second bi- cuspid. The perforation was made when enlargingthe canal for a post. A probe passes through the side of the root, up intoan abscess cavity at the apex of the tooth. The radiograph is an aid not only when we are enlarging canals forposts, but also when we are removing posts from canals. It shows ushow long the post is, and how much tissue we can cut away from the sidesof it in
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