. Elementary and dental radiography / by Howard Riley Raper . and dextrose bullion. Technic: (i) Flame platinum inoculating needle. (2) Insertplatinum needle in canal of tooth. (3) Remove needle from tooth. (4)Flame cotton in mouth of culture tube. (5) Remove cotton. (6) Flamemouth of culture tube. (7) Make plant in culture with needle. Avoidtouching sides of culture tube with needle. (8) Flame mouth of culture CANAL SURGERY AND URAL INFECTION 473 tube. (9) Flame cotton. (10) Reinsert cotton in tube. (11) Flamecotton. (12) Within an hour, place tube in incubator. An electric incubator 9 x 9 x
. Elementary and dental radiography / by Howard Riley Raper . and dextrose bullion. Technic: (i) Flame platinum inoculating needle. (2) Insertplatinum needle in canal of tooth. (3) Remove needle from tooth. (4)Flame cotton in mouth of culture tube. (5) Remove cotton. (6) Flamemouth of culture tube. (7) Make plant in culture with needle. Avoidtouching sides of culture tube with needle. (8) Flame mouth of culture CANAL SURGERY AND URAL INFECTION 473 tube. (9) Flame cotton. (10) Reinsert cotton in tube. (11) Flamecotton. (12) Within an hour, place tube in incubator. An electric incubator 9 x 9 x 12 inches (inside dimensions), suitablefor dental use, can be obtained from The Chicago Surgical and Elec-trical Company, Chicago, Illinois. The incubator temperature should be about 37J/20 C. A growth willusually occur, if at all. in from forty-eight to seventy-two hours. The matter of examining cultures and determining the nature of theorganism, obviously, cannot be considered here. If possible, this work-should be turned over to an expert laboratory Fig. 499A. Three apical foramina in lower bicuspid filled by the Callahan method. Cbc Cccbnic of Opening and filling Pulp Canals Certainly it is not out of place to include in this chapter somethingregarding pulp canal technic. No man in the world is better fitted to describe this technic thanDr. John Callahan, of Cincinnati, who has generously granted me per-mission to print the following two papers by him: one, Root CanalPreparation ; the other, Root Canal Filling. Figure 499A is a radiograph of a lower bicuspid. It shows the maincanal branching, at the apex, into three. All three of these small canalsand apical foramina are filled. As far as I know, this can be done onlyby the Callahan method. 474 APPENDIX Root Canal Preparation. By J. R. Callahan, , Cincinnati, Ohio It is certain that much may be judiciously argued in favor of thedrill, or of chemical and mechanical treatment for root preparation, andthere is some
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