title: Incus footplate assembly: Indication and surgical outcome.
abstract: To review surgical findings and hearing outcomes of incus footplate assembly (IFA) for the patients with conductive hearing loss due to missing stapes superstructure with a mobile stapes footplate.
  
  
  
  Retrospective case review and survey.
  
  
  
  Pre- and postoperative audiometric data and intraoperative findings were reviewed. Postoperative air-bone gap (ABG) and ABG closure (postoperative air-conduction threshold-preoperative bone-conduction threshold) were analyzed.
  
  
  
  The causes of missing stapes superstructure and conductive hearing loss were congenital ossicular anomaly (n = 5), chronic otitis media (n = 2), and congenital cholesteatoma (n = 1). The prosthesis was designed to fit between the medial side of the incus and stapes footplate and had a mean length of 3.6 ± 0.5 mm. The mean pre- and postoperative ABG were 38.3 ± 4.8 and 13.3 ± 10.0 dB, respectively. The postoperative ABG at frequencies of 0.25, 0.5, 1.0, 2.0, 3.0, and 4.0 kHz were 20.0 ± 15.4, 16.9 ± 11.9, 16.3 ± 10.3, 10.6 ± 7.3, 12.9 ± 14.0, and 23.1 ± 16.2 dB, respectively. The mean ABG closure was 9.5 dB (range, -1.3∼35.8 dB). Seven cases obtained the best results (mean ABG closure ≤10 dB). In the remaining patient, the mean ABG closure was 9.5 dB until 6 months after surgery, but was 35.8 dB 1 year after surgery.
  
  
  
  IFA seems to be a reasonable surgical option in patients with missing the stapes superstructure, but with a mobile footplate in which the long process of incus is preserved.
  
  
  
  4 Laryngoscope, 126:2569-2573, 2016.
authors: Department of Otorhinolaryngology-Head and Neck Surgery and Healthcare Research Institute, Seoul National University Hospital, Healthcare System Gangnam Center, Seoul, Korea.|Department of Translational Biomedical Research, Seoul National University College of Medicine, Seoul, Korea.
authors: Mina
authors: M
authors: Park
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
authors: Sungjun
authors: S
authors: Han
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
authors: Byung Yoon
authors: BY
authors: Choi
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors: Sun O
authors: SO
authors: Chang
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
authors: Chong Sun
authors: CS
authors: Kim
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea. jwkoo99@snu.ac.kr.
authors: Ja-Won
authors: JW
authors: Koo
mesh_terms: D000293:Adolescent; D000328:Adult; D001844:Bone Conduction; D002648:Child; D018424:Cholesteatoma, Middle Ear / Q000151:congenital / Q000601:surgery; D004429:Ear Ossicles / Q000002:abnormalities / Q000601:surgery; D005260:Female; D006314:Hearing Loss, Conductive / Q000151:congenital / Q000601:surgery*; D006801:Humans; D007188:Incus / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009998:Ossicular Prosthesis; D019933:Ossicular Replacement / Q000379:methods*; D010033:Otitis Media / Q000601:surgery; D011184:Postoperative Period; D012189:Retrospective Studies; D013199:Stapes / Q000002:abnormalities; D013201:Stapes Surgery / Q000379:methods*; D016896:Treatment Outcome; D055815:Young Adult
keywords: Conductive hearing loss; indication; ossicular anomaly; ossicular replacement; surgery