. Elementary and dental radiography / by Howard Riley Raper . having beenworked to the end of the canal with broach, then the root canal be floodedwith a saturated solution of soda bicarbonate. The reaction will at onceremove practically all foreign substance from the canal. If the tooththen be dried and the roots cracked open the canals show white and cleanas marble. With the tantulum root excavator and sulfuric acid the root canalmay be enlarged more rapidly and with greater freedom from unpleasantand sometimes dangerous conditions. The acid destroys and breaks downdisorganized organic tissu
. Elementary and dental radiography / by Howard Riley Raper . having beenworked to the end of the canal with broach, then the root canal be floodedwith a saturated solution of soda bicarbonate. The reaction will at onceremove practically all foreign substance from the canal. If the tooththen be dried and the roots cracked open the canals show white and cleanas marble. With the tantulum root excavator and sulfuric acid the root canalmay be enlarged more rapidly and with greater freedom from unpleasantand sometimes dangerous conditions. The acid destroys and breaks downdisorganized organic tissue, the soda solution removing the debris withoutforcing the disorganized substance through an open foramen, as manydentists seem to fear. If acid solution be placed in a small glass tube, and you then pour CANAL SURGERY AND ORAL INFECTION 4^3 the soda solution into the tube, it will be seen that chemical action is allon top of the acid, or only on the surface of acid exposed to the soda;or, in other words, it does not react in the form of an explosion, the. Fig. 409. Copper band cemented on tooth tofacilitate the placing of rubber dam wherethe cavity extends below the gum margin.
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