Dental cosmos . k In nearly all cases too much lamp-heat is used ; the material isheld in the flame entirely too long. It never should be held in theflame until the edges of the block of amalgam turn brown or blue;it should be held first in the flame and raised as it heats, until yousee minute particles of mercury appear on its surface; then itshuuld be thoroughly crushed in the mortar, then rubbed briskly in order to get heat by frictionIwhen this has been done wellyou will have a fine powder,which turn into the palm of thehand and by the animal heatand its further manipulationyou have a plas
Dental cosmos . k In nearly all cases too much lamp-heat is used ; the material isheld in the flame entirely too long. It never should be held in theflame until the edges of the block of amalgam turn brown or blue;it should be held first in the flame and raised as it heats, until yousee minute particles of mercury appear on its surface; then itshuuld be thoroughly crushed in the mortar, then rubbed briskly in order to get heat by frictionIwhen this has been done wellyou will have a fine powder,which turn into the palm of thehand and by the animal heatand its further manipulationyou have a plastic mass in ui^^-^^rffC; very short time. The great - 0 secret in the use of the copper amalgam is to get an extremelysoft, pulpy mass, and yet to have it set quickly. Copper amalgamshould never be used in & dry, granular form, but in a wet. soft mass;and if it is properly handled, it will set sufficiently hard in fromthree to five minutes. Thus beautiful amalgam contours are possible, practicable, and. mm COMPULSORY ERUPTION OF THE TEETH. 249 durable. Thus solid contours of amalgam or gold may be madewith little if any pain to the patient. The only weak point in ourmethod is in the third class of teeth,—anterior teeth with livingpulps. We have not given up this problem yet, and hope to con-quer it. In the interim, if it is deemed best not to destroy the pulpin order to give place for the pin, such a tooth may be contouredwith gold in the ordinary way, the other solid work serving as a Fig. 15.
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Keywords: ., bookauthor, bookcentury1800, bookdecade1880, booksubjectdentistry
