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Bioglass middle ear prosthesis: long-term results

K R Rust1, G T Singleton, J Wilson

  • 1Department of Otolaryngology, University of Florida, Gainesville 32610, USA.

The American Journal of Otology
|May 1, 1996
PubMed
Summary
This summary is machine-generated.

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Bioglass middle ear prostheses show excellent long-term tissue compatibility and stable hearing results in patients. Early device fractures were identified as the cause of the few failures in this study.

Area of Science:

  • Biomaterials Science
  • Otolaryngology
  • Medical Device Engineering

Background:

  • Bioglass prostheses have been utilized for middle ear reconstruction.
  • Long-term outcomes and tissue compatibility require thorough evaluation.

Purpose of the Study:

  • To review the University of Florida's long-term results with Bioglass middle ear prostheses.
  • To assess the efficacy and safety of these devices in patients undergoing ossicular reconstruction.

Main Methods:

  • Retrospective review of 37 patients implanted with Bioglass prostheses (total and partial ossicular replacements) between 1984 and 1987.
  • Analysis of postoperative data, including audiological outcomes (air-bone gap) and device integrity, with follow-up ranging up to 126 months.

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Main Results:

  • Twenty-one patients had at least 24 months of follow-up; five had over 10 years.
  • Four device failures occurred, attributed to fractures in early prototypes; no extrusions of intact prostheses were observed.
  • Mean air-bone gap after 24 months was 24 dB, with 53% of patients achieving an air-bone gap of 20 dB or less. Hearing results remained stable over time.

Conclusions:

  • Bioglass middle ear prostheses demonstrate excellent long-term tissue compatibility.
  • The study highlights the importance of device design, with early prototype fractures being the primary cause of failure.
  • Bioglass prostheses are a viable option for middle ear reconstruction, offering stable audiological outcomes.