Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . l n; Metal oegath\ mere contact may occur. To place the negative electrode NECROSIS AND GANGRENE OF THE DENTAL PULP 209 upon the patients cheek, lip or gum surface by means of a clampor spring, as recommended by some operators, is to be avoided, forthe reason that severe burns may result. It has been stated thatthis blistering results from the formation of caustic sodium hydroxid. Fig. 117.—Sponge hand electrode. near the negative pole. The blistering is the result of imperfectcontact

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Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . l n; Metal oegath\ mere contact may occur. To place the negative electrode NECROSIS AND GANGRENE OF THE DENTAL PULP 209 upon the patients cheek, lip or gum surface by means of a clampor spring, as recommended by some operators, is to be avoided, forthe reason that severe burns may result. It has been stated thatthis blistering results from the formation of caustic sodium hydroxid. Fig. 117.—Sponge hand electrode. near the negative pole. The blistering is the result of imperfectcontact between the skin and the metal electrode, thereby increas-ing the resistance of a small area to such an extent as to producehigh heat, i. e., an electric burn. The positive electrode to beintroduced into the tooth consists of a piece of iridio-platinum wireNo. 20 gauge, about one inch long and tapered to a delicate point.

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Keywords: ., bookcentury1900, bookdecade1920, bookiddiseasesofso, bookyear1922