. Electro-radiographic diagnosis; a book on the electric test for pulp vitality, giving the technic of its use in detail and submitting clinical evidence of its absolute necessity to dental diagnosis . e three sockets orbinding posts. With the cords plugged into 1 (L) and 2 (M) the out-put current, is weakest. With the cords plugged into 1(L) and 3 (R) the output current is strongest. With thecords plugged into 2 (M) and 3 (R) an intermediate cur-rent strength is attained. It makes practically no difference about electrode may be attached to any socket. When using a machine Avi
. Electro-radiographic diagnosis; a book on the electric test for pulp vitality, giving the technic of its use in detail and submitting clinical evidence of its absolute necessity to dental diagnosis . e three sockets orbinding posts. With the cords plugged into 1 (L) and 2 (M) the out-put current, is weakest. With the cords plugged into 1(L) and 3 (R) the output current is strongest. With thecords plugged into 2 (M) and 3 (R) an intermediate cur-rent strength is attained. It makes practically no difference about electrode may be attached to any socket. When using a machine Avitli the three sockets, thewriter uses the connection 1 (L) to 3 (R) only for allcases to avoid the necessity of changing uninsulatedplugs. (See Chapter V under the heading A ValuablePoint in Technic) 45 46 ELECTKO-EADIOGEAPHIC DIAGNOSIS Speaking of the control of the output current of theordinary commercial Faradic machines with the threesockets, one may say that, like automobiles, they havethree speeds or strengths: First or low 1-2 (L-M) Second or intermediate 2-3 (M-K) Third or high 1-3 (L-E) Continuing the analogy, the current controller is nowthe throttle. INTERRUPTER r^. CURREMTCONTROLLER. ^l^ELECTRODE DENTALELECTRODE Fig. 23. From here on the steps in technic will be numberedconsecutively. First: Plug the cords, to which the hand and dentalelectrodes are attached, into the machine. Second: Wrap the metal point of the dental electrodewith cotton. Third: Moisten the cotton in water or a sodium chlo-rid solution. TECHNIC OF ELECTEIC TEST 47 Fourth: Expel the extreme excess moisture by touchinglightly to blotting paper or napkin. Fifth: Have loatient hold the hand electrode. Sixth: Turn on the current at the main switch. Ifthis does not cause a humming noise, fap the machine orthe interrupter sharply. If this does not start the hum-ming, adjust the interrupter screiv. Seventh: With the current controller set to give theminimum current, touch the tooth to he tested ivith thed
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