. Dental electro-therapeutics. reatmentof pyorrhoea, says: I have derived the best results from acombination treatment of r-ray and the use of specialvacuum electrode of my own design that conveys thehigh frequency currents and at the same time bathes thegums and underlying tissues in the rich radiations of thebi-ultra-violet rays. A metal electrode is meanwhile held 1 Dental Cosmos, vol. xlv, p. 947. 2 Ibid., vol. xlvi, p. 642. 3 Ibid., vol. xlviii, p. 274. X-RAY AND HIGH FREQUENCY CURRENTS 269 in the hand to complete the circuit through the body ofthe DArsonval currents. S. Tousey,1 of New Y
. Dental electro-therapeutics. reatmentof pyorrhoea, says: I have derived the best results from acombination treatment of r-ray and the use of specialvacuum electrode of my own design that conveys thehigh frequency currents and at the same time bathes thegums and underlying tissues in the rich radiations of thebi-ultra-violet rays. A metal electrode is meanwhile held 1 Dental Cosmos, vol. xlv, p. 947. 2 Ibid., vol. xlvi, p. 642. 3 Ibid., vol. xlviii, p. 274. X-RAY AND HIGH FREQUENCY CURRENTS 269 in the hand to complete the circuit through the body ofthe DArsonval currents. S. Tousey,1 of New York, advocates a combination ofx-ray and high frequency currents for the treatment ofpyorrhoea alveolaris. A specially prepared x-ray tube withthe ray localized to an opening in a shield of 2\ inchesis used. The rays should be about No. 4 of the Walteror of the Benoist scale, the resistance equal to a parallelspark of about 2 inches, the primary current about 3 am-peres, with a 12-inch coil and Wehnelf interrupter and Fig. 140. Touseys x-ray tube for treating pyorrhea. a current of 2 ma. passing through the .r-ray anticathode of the tube is about 10 inches from theface, the lips are open, exposing the teeth and gums, andthe time of exposure is from one to two minutes. escapes only from this special tube at the end ofthe prolongation and the strength of application is muchreduced as compared with the ordinary .r-ray tube. Treat-ments are given to the affected gums twice a week,immediately followed on each occasion by high frequencycurrents, applied by vacuum electrodes especially prepared Medical Electricity and Rontgen Rays, p. 566. 270 ELECTRO-THERAPEUTICS for this purpose, which fit the different aspects of thealveolar border and necks of the teeth. The high frequencyis applied for thirty seconds to one place and then movedto another. The usual ozone effect is noticed about theelectrode and the application is said to be entirely painless. Tousey says: The r
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