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Related Experiment Videos

Evaluation of hydroxyapatite ossicular chain prostheses.

R Pasha1, S L Hill, D L Burgio

  • 1Department of Otolaryngology-Head and Neck Surgery, Wayne State University, USA.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|October 6, 2000
PubMed
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Hydroxyapatite (HA) prostheses offer a viable alternative for middle ear reconstruction. This study found HA incus struts and partial or total ossicular chain prostheses provide significant hearing improvement, supporting malleus use in reconstruction.

Area of Science:

  • Biomaterials Science
  • Otolaryngology
  • Surgical Innovation

Background:

  • Hydroxyapatite (HA) prostheses are increasingly used in middle ear surgery.
  • They serve as alternatives to autografts and homografts for ossicular chain reconstruction.
  • Different types of HA prostheses exist, including total and partial ossicular chain prostheses and incus struts.

Purpose of the Study:

  • To evaluate the efficacy of three types of hydroxyapatite (HA) middle ear prostheses.
  • To compare hearing outcomes based on the type of HA prosthesis used.
  • To investigate the influence of prognostic risk factors on hearing results.

Main Methods:

  • A single-surgeon study involving 33 consecutive cases.
  • Utilized three types of HA prostheses: total ossicular chain prostheses, partial ossicular chain prostheses, and Kartush incus struts.

Related Experiment Videos

  • Analyzed postoperative air-bone gap and air-bone gap closure.
  • Assessed prognostic risk factors using the Middle Ear Risk Index.

    • Main Results:

    • Statistically significant differences in mean postoperative air-bone gap and air-bone gap closure were observed among the prosthesis types.
    • Incus struts showed a mean air-bone gap of 14 dB and closure of 26 dB.
    • Partial ossicular chain prostheses had a mean air-bone gap of 22 dB and closure of 11 dB.
    • Total ossicular chain prostheses had a mean air-bone gap of 25 dB and closure of 10 dB.
    • Higher Middle Ear Risk Index scores correlated with a tendency for worse postoperative hearing.

    Conclusions:

    • Hydroxyapatite (HA) ossicular prostheses are effective for middle ear reconstruction.
    • The study supports the use of HA prostheses, particularly utilizing the malleus for ossicular chain construction.
    • Prognostic factors, such as those in the Middle Ear Risk Index, should be considered in surgical planning.