title: Results of revision mastoidectomy with Piezosurgery(®).
abstract: CONCLUSIONS
  For otologic revision surgery, the advantage of the piezoelectric device appears real because it is possible to perform a 'blind' cutting of bone with fewer precautions necessary for soft tissues such as the facial nerve, lateral sinus, and dura mater.
  
  
  OBJECTIVE
  The aim of this study was to determine the efficiency of the piezoelectric device in revision surgery for chronic otitis media.
  
  
  METHODS
  A total of 30 patients had revision mastoidectomy with previous canal wall up mastoidectomy. The piezoelectric device was used in all intraoperative steps. Before surgery and 1 month and 1 year after surgery, all the patients underwent the following instrumental examinations: pure-tone audiometry, tympanometry, transient-evoked otoacoustic emissions, distortion product otoacoustic emissions, auditory brainstem response, and electronystamographic recording.
  
  
  RESULTS
  The piezoelectric device provided effective cutting, with excellent control and without side effects on the adjacent structures of the middle and inner ear (lateral sinus, facial nerve, and/or dura mater). Postoperatively, all patients had an uneventful recovery with no evidence of audiovestibular deficit or side effects. Among 30 cases followed for 1 year, 29 (97%) maintained a dry and safe ear. Intermittent otorrhea with perforation of the tympanic membrane occurred in one patient (3%).
authors.affiliation: ENT Department, University of Genoa, Italy.
authors.forename: Angelo
authors.initials: A
authors.lastname: Salami
authors.forename: Renzo
authors.initials: R
authors.lastname: Mora
authors.forename: Massimo
authors.initials: M
authors.lastname: Dellepiane
authors.forename: Barbara
authors.initials: B
authors.lastname: Crippa
authors.forename: Luca
authors.initials: L
authors.lastname: Guastini
mesh_terms: D000328:Adult; D000368:Aged; D001301:Audiometry, Pure-Tone; D002908:Chronic Disease; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006801:Humans; D008297:Male; D008416:Mastoid / Q000601:surgery*; D008875:Middle Aged; D010033:Otitis Media / Q000503:physiopathology / Q000601:surgery*; D017084:Otoacoustic Emissions, Spontaneous; D013506:Otologic Surgical Procedures / Q000379:methods*; D012086:Reoperation / Q000379:methods*; D012189:Retrospective Studies; D016896:Treatment Outcome