. Elementary and dental radiography / by Howard Riley Raper . been injected with bismuth paste and a radiographmade, the connection between the third molar and the fistulous opening *Bismuth subnitrate, vaseline, onraffine and white wax. 200 DENTAL RADIOGRAPHY at the symphysis would have been clearly shown. I regret that I havenot been able to obtain a radiograph of such a case. I have not, however,and must, therefore, content myself with a report of the only case I havein which bismuth paste was used to trace a fistulous tract. Case: A fistulous opening on the buccal nearTigs. 211 and 212. th

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. Elementary and dental radiography / by Howard Riley Raper . been injected with bismuth paste and a radiographmade, the connection between the third molar and the fistulous opening *Bismuth subnitrate, vaseline, onraffine and white wax. 200 DENTAL RADIOGRAPHY at the symphysis would have been clearly shown. I regret that I havenot been able to obtain a radiograph of such a case. I have not, however,and must, therefore, content myself with a report of the only case I havein which bismuth paste was used to trace a fistulous tract. Case: A fistulous opening on the buccal nearTigs. 211 and 212. the apex of an upper second bicuspid; the first molarmissing. Another fistulous opening on the buccaljust above the gingival line of the second molar. A probe entering thefistula above the bicuspid led to its apex. A probe entering the fistula ofthe molar seemed to lead to the bifurcation of the roots of the at a previous date treated the molar, and so knowing the condi-tion of the canals. I was reluctant to believe that the tooth was

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