title: Two Different Percutaneous Bone-Anchored Hearing Aid Abutment Systems: Comparative Clinical Study.
abstract: OBJECTIVE
  To compare two different percutaneous bone-anchored hearing aid (BAHA) abutment systems regarding operation time, scar healing, quality of life, implant stability, audiologic results, and complications.
  
  
  METHODS
  The study involves a prospective multi-center clinical evaluation. Thirty-two consecutive patients who had undergone BAHA surgery from January 2011 to January 2013 in two tertiary centers were included in the study. The Glasgow Inventory Benefit Score was used to assess the patients at least 6 months after surgery. The operation time and complications were recorded. Implant stability quotient (ISQ) values were recorded using resonance frequency analysis. Holger's classification was used to evaluate skin reactions.
  
  
  RESULTS
  The mean length of the operation was 39.2±4 min for standard abutment and 18.3±5.7 min for hydroxyapatite-coated abutment. ISQ scores were significantly better for standard abutment in all tests. The mean total Glasgow Inventory Benefit Score was 39.3±19 for the standard abutment and 46.3±24.5 for the hydroxyapatite-coated abutment groups, but there was no statistical significance between the two groups. There was no difference in audiological improvement between the two groups after surgery.
  
  
  CONCLUSIONS
  Hydroxyapatite-coated abutment provided a shorter operation time that was significantly different from standard abutment. There were no significant differences between standard abutment and hydroxyapatite-coated abutment regarding audiologic improvement, quality of life, loading time, and complications.
authors.affiliation: Department of Otorhinolaryngology Head and Neck Surgery, İstanbul University School of Medicine, İstanbul, Turkey. beldanmdpolat@gmail.com.
authors.forename: Beldan
authors.initials: B
authors.lastname: Polat
authors.forename: Mete
authors.initials: M
authors.lastname: İşeri
authors.forename: Kadir Serkan
authors.initials: KS
authors.lastname: Orhan
authors.forename: Ayça Başkadem
authors.initials: AB
authors.lastname: Yılmazer
authors.forename: Necati
authors.initials: N
authors.lastname: Enver
authors.forename: Didem
authors.initials: D
authors.lastname: Ceylan
authors.forename: Ahmet
authors.initials: A
authors.lastname: Kara
authors.forename: Yahya
authors.initials: Y
authors.lastname: Güldiken
authors.forename: Şenol
authors.initials: Ş
authors.lastname: Çomoğlu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001309:Auditory Threshold; D001844:Bone Conduction; D002648:Child; D017886:Durapatite; D005260:Female; D006310:Hearing Aids; D034381:Hearing Loss / Q000209:etiology / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D061646:Operative Time; D011183:Postoperative Complications / Q000209:etiology; D011446:Prospective Studies; D011474:Prosthesis Design; D053441:Suture Anchors; D055815:Young Adult
chemical_list: D017886:Durapatite