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Related Experiment Videos

Hearing results with the Dornhoffer ossicular replacement prostheses

J L Dornhoffer1

  • 1Department of Otolaryngology--Head and Neck Surgery, University of Arkansas for Medical Sciences, Little Rock 72205, USA.

The Laryngoscope
|April 18, 1998
PubMed
Summary

New ossicular replacement prostheses (PORP and TORP) show significant hearing improvements in patients. These prostheses balance surgical ease with acoustic performance, offering encouraging short-term hearing results for various ear surgeries.

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Area of Science:

  • Otolaryngology
  • Biomaterials Engineering
  • Audiology

Background:

  • The ideal ossicular replacement prosthesis balances surgical ease with acoustic function.
  • Existing prostheses may not fully meet requirements for biocompatibility, weight, and positioning.
  • Development focused on creating prostheses addressing both surgical and acoustic considerations.

Purpose of the Study:

  • To evaluate the short-term hearing outcomes of patients who received novel partial ossicular replacement prostheses (PORP) and total ossicular replacement prostheses (TORP).
  • To assess the efficacy of prostheses designed with specific surgical and acoustic parameters.

Main Methods:

  • Retrospective study of 52 patients implanted with Dornhoffer HAPEX PORP or TORP from June 1995 to March 1997.
  • Analysis of preoperative and postoperative pure-tone averages (PTAs) to calculate air-bone gaps (ABGs).

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  • Inclusion criteria: primary cholesteatoma or revision mastoidectomies with hearing loss or draining cavities.

    • Main Results:

    • Statistically significant hearing improvement (P < 0.05) observed in both PORP and TORP groups after 1 year.
    • Excellent hearing results (≤10 dB ABG) achieved in 69% of PORP cases and 35% of TORP cases.
    • Good hearing results (11-20 dB ABG) achieved in 31% of PORP cases and 50% of TORP cases.

    Conclusions:

    • The newly designed PORP and TORP prostheses demonstrate encouraging short-term hearing results.
    • Integrating surgical and acoustic design factors is crucial for effective ossicular reconstruction.
    • These prostheses represent a promising advancement in improving hearing outcomes after middle ear surgery.