[A study of audiometric device for determining root canal length (author's transl)].
D001299:Audiometry; D002508:Cephalometry / Q000295:instrumentation*; D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D006801:Humans; D009811:Odontometry / Q000295:instrumentation*; D009991:Oscillometry / Q000295:instrumentation