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EXTRACTION OF PERMANENT TEETH 267

of the bone, and in this ease they overlie the inferior dental nerve
and vessels.
Hemorrhage Following- Extraction. Excessive hemorrhage fre-
quently follows tooth extraction, and is more frequently met with in
cases after extracting first or second lower molars.

Fig. 141.—Position for extracting left inferior third molars.
In Mild Cases a tampon of cotton saturated with hydrogen di-
oxide or adrenalin chloride crowded well to the bottom of the alveolus
from which the hemorrhage is coming will usually be sufficient.
In Severe Cases a tampon made of the scrapings of oak-tanned