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MUMMIFICATION OF THE PULP. 441

nants. Dr. Miller expresses faith in the power of oil of cinnamon to
permanently sterilize pulp fragments. He suggests the experimental
application of the sterilizing tablets to such teeth as are readily sal-
vable yet which are for various reasons " consigned to the forceps."
Dr. Theodore Soderberg of Sydney, X. S. AV., reports excellent
results from a continuous practice of this variety of pulp sterilization.
He employs a paste composed of

^. Alum exsic,
Thymol,
Glycerol, da. 3j
;
Zinc oxid. q. s. to make stiff paste.—M.


It will be noted that he substitutes dried alum for tannin, originally
used by him as the hardening agent : his experiments showed the
tannin to be productive of discoloration. INIercuric chlorid is set aside
for the same reason. Oil of cassia employed in the paste also caused
discoloration. At present Dr. Soderberg adds a small quantity of
cocain to the paste to prevent the pain arising from the action of the
dried alum. He states (Nov. 1895) that he has in a year applied the
paste in 97 cases and has had no untoward results. The method of
jslacing the material is shown in Figs. 399, 400.

Fig. 399. Fig. 400.













a, Caries exposing a horn of the pulp. a, Root portion of pulp b, mummifying paste
;
c, zinc phosphate ; d, gold or amalgam.
C. A. Firth of Queenleyan, N. S. W.,^ advises the omission of
zinc oxid from the paste, to avoid the formation of the brown tannate
of zinc. He suggests the use of a mixture of tannic acid and thymol
equal parts, made into a paste with glycerol and ajiplied with ivory
instruments, to avoid di.^colorations. He expresses him.'^clf as gratified
at the results obtained. Another formula suuirosted bv the same gentle-
man is-
1 Lental Cosmos, Mav, 1896.
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