. Elementary and dental radiography . apex of a tooth carrying acrown. If the canals of the tooth are properly filled, we should treat thesinus through the external alveolar plate; if the canals are not properlyfilled, then the crown should be removed and the case treated throughthe tooth—perhaps through the external alveolar plate also, dependingon the extent of the destruction of tissue. Whether or not the crownshould be removed is determined by the use of the radiograph. See Fig. 188. This radiograph shows that it is quite unnecessary toremove the post-collar crown (an abutment of a bridge)
. Elementary and dental radiography . apex of a tooth carrying acrown. If the canals of the tooth are properly filled, we should treat thesinus through the external alveolar plate; if the canals are not properlyfilled, then the crown should be removed and the case treated throughthe tooth—perhaps through the external alveolar plate also, dependingon the extent of the destruction of tissue. Whether or not the crownshould be removed is determined by the use of the radiograph. See Fig. 188. This radiograph shows that it is quite unnecessary toremove the post-collar crown (an abutment of a bridge) from the ab-scessed lateral, for the canal is well filled. As formerlv recorded, the 192 DEXTAL RADIOGRAPHY treatment of this case was chiefly surgical, through the external alveolarplate, and was effective. In the third edition of his Modern Dental Ma-Tifi. 200. tcria Medica, Pharmacology and Therapeutics, Dr. Buckley prints Fig. 200, and the following descrip-tion : Fig. 200 shows the involvement of the upper central and lateral.
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