title: Indication criteria and outcomes with the Bonebridge transcutaneous bone-conduction implant.
abstract: OBJECTIVE
  The aim of this study was to evaluate functional hearing gain, speech understanding, and preoperative bone-conduction thresholds with the bone-conduction implant Bonebridge.
  
  
  METHODS
  Retrospective study at a tertiary referral center.
  
  
  METHODS
  Twenty-four consecutive Bonebridge patients were identified. Nine patients suffered from combined hearing loss (HL), 12 from atresia of the external auditory canal and three from single-sided deafness. One patient was lost to follow-up. Twenty-three patients were therefore analyzed.
  
  
  RESULTS
  The overall average functional hearing gain of all patients (n = 23) was 28.8 dB (±16.1 standard deviation [SD]). Monosyllabic word scores at 65 dB sound pressure level in quiet increased statistically significantly from 4.6 (±7.4 SD) percentage points to 53.7 (±23.0 SD) percentage points. Evaluation of preoperative bone-conduction thresholds revealed three patients with thresholds higher than 45 dB HL in the high frequencies starting at 2 kHz. These three patients had a very limited benefit of their bone-conduction implants.
  
  
  CONCLUSIONS
  The Bonebridge bone-conduction implant provides satisfactory results concerning functional gain and speech perception if preoperative bone conduction lies within 45 dB HL.
  
  
  METHODS
  4.
authors.affiliation: From the Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Vienna, Vienna, Austria.
authors.forename: Dominik
authors.initials: D
authors.lastname: Riss
authors.forename: Christoph
authors.initials: C
authors.lastname: Arnoldner
authors.forename: Wolf-Dieter
authors.initials: WD
authors.lastname: Baumgartner
authors.forename: Michaela
authors.initials: M
authors.lastname: Blineder
authors.forename: Stefan
authors.initials: S
authors.lastname: Flak
authors.forename: Anna
authors.initials: A
authors.lastname: Bachner
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Gstoettner
authors.forename: Jafar-Sasan
authors.initials: JS
authors.lastname: Hamzavi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D001844:Bone Conduction / Q000502:physiology*; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006310:Hearing Aids; D006314:Hearing Loss, Conductive / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000379:methods*; D012189:Retrospective Studies; D013067:Speech Perception / Q000502:physiology*; D053441:Suture Anchors; D013536:Suture Techniques / Q000295:instrumentation; D016896:Treatment Outcome; D055815:Young Adult
keywords: Bonebridge; bone-anchored hearing aid; bone-conduction implant; indication criteria; outcome