. Elementary and dental radiography / by Howard Riley Raper . e been conserved and the openingmade into the sinus through the external alveolar plate. The foregoing was written five years ago. It is unlikely that Iwould be criticised to-day for extracting the lateral, though I might becriticised for not removing all three teeth or at least for not removingthe ends of the roots of the teeth not extracted. 23. Tn Cases of Abscess of multirooted teeth, to Cearn at the flpex of Ulbicb Root the Abscess exists. This radiograph shows an abscess at the apexfig. 19$. of the mesial root of a shell-crown


. Elementary and dental radiography / by Howard Riley Raper . e been conserved and the openingmade into the sinus through the external alveolar plate. The foregoing was written five years ago. It is unlikely that Iwould be criticised to-day for extracting the lateral, though I might becriticised for not removing all three teeth or at least for not removingthe ends of the roots of the teeth not extracted. 23. Tn Cases of Abscess of multirooted teeth, to Cearn at the flpex of Ulbicb Root the Abscess exists. This radiograph shows an abscess at the apexfig. 19$. of the mesial root of a shell-crowned, lower first molar. The canals of the tooth are not is so much definite evidence of extensive infection about themesial root that its removal is indicated; the distal root can be con- THE USES OE THE RADIOGRAFH IN DENTISTRY ioj served. Perhaps disinfection of the area about the mesial root couldbe accomplished by ionization. The ionization method of disinfectionis comparatively untried but it seems to the writer to hold great


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