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Related Concept Videos

The Auditory Ossicles01:11

The Auditory Ossicles

The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...

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Related Experiment Video

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Titanium clip ball joint: a partial ossicular reconstruction prosthesis.

Dirk Beutner1, Jan Christoffer Luers, Matthias Bornitz

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany. dirk.beutner@uni-koeln.de

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|March 2, 2011
PubMed
Summary
This summary is machine-generated.

A novel titanium ossicular prosthesis with a micro ball joint effectively compensates for tympanic membrane movement, improving sound transmission in partial ossicular reconstruction. Clinical trials show satisfying hearing results and prosthesis stability.

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Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Materials Science

Background:

  • Partial ossicular reconstruction is crucial for hearing restoration.
  • Existing prostheses may face challenges with tympanic membrane displacement.
  • A need exists for improved middle ear prostheses that adapt to tympanic membrane motion.

Purpose of the Study:

  • To introduce and evaluate a new titanium clip prosthesis for partial ossicular reconstruction.
  • To incorporate a micro ball joint in the headplate to compensate for tympanic membrane displacements.
  • To assess the prosthesis's efficacy in sound transmission and patient outcomes.

Main Methods:

  • Laboratory experiments using temporal bone models with laser Doppler vibrometry and force measurements.
  • Clinical implantation of the modified titanium prosthesis in 18 patients.
  • Preoperative and postoperative pure tone audiometry and questionnaire analysis for outcome assessment.

Main Results:

  • Laboratory tests confirmed adequate mobility with measured frictional resistance of 12 mN.
  • Laser Doppler vibrometry demonstrated effective sound transmission through the prosthesis.
  • Postoperative audiometry showed a mean air-bone gap of 18.2 dB; no dislocations occurred within a 6-month follow-up.

Conclusions:

  • The modified titanium prosthesis with a micro ball joint meets sound transmission requirements.
  • The integrated joint allows the headplate to follow tympanic membrane movements, enhancing prosthesis effectiveness.
  • The design ensures optimal placement and function for partial ossicular reconstruction.