. Elementary and dental radiography / by Howard Riley Raper . dentin, I have resorted to color photography. To vouch forthe correctness of the pictures I have the original specimens here forcomparison. One better versed than I in laboratory technic could cer-tainly work out a more satisfactory scheme than this. The pulp canals of a number of extracted teeth were openedmechanically—that is, with burs and drills—dehydrated and pumped full CANAL SURGERY AND ORAL INFECTION 493 of the rosin and chloroform that had been stained bine. Then the gutta-percha cones were used as has been described above.
. Elementary and dental radiography / by Howard Riley Raper . dentin, I have resorted to color photography. To vouch forthe correctness of the pictures I have the original specimens here forcomparison. One better versed than I in laboratory technic could cer-tainly work out a more satisfactory scheme than this. The pulp canals of a number of extracted teeth were openedmechanically—that is, with burs and drills—dehydrated and pumped full CANAL SURGERY AND ORAL INFECTION 493 of the rosin and chloroform that had been stained bine. Then the gutta-percha cones were used as has been described above. I do not claim that this procedure gives an exact reproduction ofconditions in a tooth canal while the tooth is yet in service in the do claim that the specimens and the pictures give a clear and under-standable basis from which we can work toward a reasonable ideal. The illustrations following are shown more to explain the theorythan to prove results. There is a vast difference between filling a rootcanal in an extracted tooth and one in Fig. r>07. Water dropped into a dry glass tube does not go to the end of the tube on account ofentrapped air. Rosin solution should be worked to the ends of root canals with fine broach.
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