title: A novel approach to facial nerve decompression: use of Piezosurgery.
abstract: CONCLUSIONS
  The safety of Piezosurgery as regards soft tissues in facial nerve decompression was confirmed. No side effects were detected during unintentional contact with the nerve.
  
  
  OBJECTIVE
  The aim of this work was to test Piezosurgery as a new and alternative method to conventional bone tissue management in facial nerve decompression by posterior tympanotomy.
  
  
  METHODS
  We used Piezosurgery under general anaesthesia on 10 patients affected by facial paralysis following temporal bone fractures. The equipment consists of two hand-pieces, two inserts and two peristaltic pumps connected to the control unit. The device uses low frequency ultrasonic waves (24.7-29.5 kHz), the applied power can be modulated between 2.8 and 16 W, and the machine is programmed in accordance with the density of the bone. The micro-vibrations that are created in the piezoelectric hand-piece cause the inserts to vibrate linearly between 60 and 210 microm.
  
  
  RESULTS
  Piezosurgery proved effective in sclerotic and pneumatic mastoid. This approach results in significantly less operative blood loss and better visibility in the surgical field compared with conventional methods. Its safety as regards soft tissues was confirmed: no side effects were detected during unintentional contact with the nerve. All patients presented a complete recovery from facial paralysis at the last follow-up.
authors.affiliation: ENT Department, University of Genoa, Genoa, Italy.
authors.forename: Angelo
authors.initials: A
authors.lastname: Salami
authors.forename: Massimo
authors.initials: M
authors.lastname: Dellepiane
authors.forename: Renzo
authors.initials: R
authors.lastname: Mora
mesh_terms: D000328:Adult; D000368:Aged; D001309:Auditory Threshold / Q000502:physiology; D004432:Ear, Middle / Q000601:surgery; D004867:Equipment Design; D004869:Equipment Safety; D020220:Facial Nerve Injuries / Q000601:surgery*; D005158:Facial Paralysis / Q000601:surgery*; D005260:Female; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000601:surgery*; D012887:Skull Fractures / Q000150:complications*; D013701:Temporal Bone / Q000293:injuries*; D014464:Ultrasonic Therapy / Q000295:instrumentation*