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The author has carried out an extensive clinical and experimental study of the influence of diathermy on the periodontal tissues. The technic consists of the insertion of one needle-shaped electrode into the root canal that is to be treated, while the other electrode is held in the patient's hand. The experimental part was carried out in the teeth of dogs and is illustrated by good and instructive photomicrographs of sections through the treated teeth and their supporting tissues. Bacteria were brought into these dogs' teeth and into extracted human teeth and the influence of diathermy on them was noted. Diathermy was applied also to a large number of clinical patients. On the strength of these results the treatment of root canals with diathermy is considered a useful method which offers the advantage that it reaches areas in the root which are inaccessible by other methods. A comprehensive bibliography of the
Experimentelle og kliniske Undersøgelser over Rodbehandling af Tænder med højfrekvent Vekselstrøm (Diathermi). JAMA. 1937;108(7):584. doi:10.1001/jama.1937.02780070068033