title: [Replacement of ear ossicles with titanium prostheses].
abstract: BACKGROUND
  Titanium has been a well established implant material for many years. New material processing techniques now permit the manufacture of small implants for ossicular chain reconstruction.
  
  
  METHODS
  Between November 1994 and September 1995, 100 titanium middle ear implants (55 PORP, 45 TORP) were used for reconstruction of the ossicular chain. A range of five different sizes for partial and total protheses suits all implantation needs. The shape of the implants can be altered by bending. Time consuming intraoperative shaping and trimming is avoided.
  
  
  RESULTS
  At a follow-up time of three months (33 patients) and six months (17 patients), no adverse reactions or extrusions occurred. Biologic fixation between the foot of the partial prothesis and the head of the stapes was found eight months after implantation. A hearing result of 0-20 dB residual air-bone gap was achieved in 79%.
  
  
  CONCLUSIONS
  Titanium middle ear implants show good bio-compatibility and are readily integrated into the ossicular chain. Although delicate in shape, they offer excellent mechanical properties in respect to sound conduction and implantation. Initial results show Titanium to be a perfect implant material for middle ear prostheses, although long-term results are not yet available.
authors.affiliation: Hals-Nasen-Ohrenklinik, Plastische Chirurgie im Kopf- und Halsbereich, Dominikus Krankenhaus Düsseldorf/Heerdt.
authors.forename: C H
authors.initials: CH
authors.lastname: Stupp
authors.forename: H F
authors.initials: HF
authors.lastname: Stupp
authors.forename: D
authors.initials: D
authors.lastname: Grün
mesh_terms: D001309:Auditory Threshold / Q000502:physiology; D005500:Follow-Up Studies; D006314:Hearing Loss, Conductive / Q000209:etiology / Q000601:surgery*; D006801:Humans; D009998:Ossicular Prosthesis; D011183:Postoperative Complications / Q000209:etiology / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D014025:Titanium
chemical_list: D014025:Titanium
vernacular_title: Gehörknöchelchenersatz mit Titan-Prothesen.