Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . pitate of silver oxid is throwndown. This is soluble in an excess of ammonia, therefore continueadding the ammonia until the solution becomes clear. Solution 2.—This consists of a 25 per cent solution of formalinin water. These two solutions must be kept in separate dark-coloredbottles, with glass stoppers, and should be kept away from the light 1 Dental Cosmos, 1917, p. 891. 2 Journal of the National Dental Association, 1919, p. 930. 218 DISEASES OF THE DEh T W. PULP as much as possi
Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . pitate of silver oxid is throwndown. This is soluble in an excess of ammonia, therefore continueadding the ammonia until the solution becomes clear. Solution 2.—This consists of a 25 per cent solution of formalinin water. These two solutions must be kept in separate dark-coloredbottles, with glass stoppers, and should be kept away from the light 1 Dental Cosmos, 1917, p. 891. 2 Journal of the National Dental Association, 1919, p. 930. 218 DISEASES OF THE DEh T W. PULP as much as possible. They \\ork better it they are freshly prepared, t)in are -till good after a considerable time, it kept as recommended. The principle employed is that of reducing the silver from its Solution. Metallic silver is thrown down in a Very finely divided state. It is deposited upon the sides of a clean test-tube as a mirror. The principle is used in photography and iii staining methods in histology. The action in the tooth is the same. Afinely divided deposit of silver in its metallic form occurs wherever.
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