Parameters for novel incus replacement prostheses

Prostheses replacing the incus in its normal position and equipped with two joints might transfer sound as effectively as the intact ossicular chain and allow adjustment to quasi-static pressure changes. A prerequisite for prostheses development is the access to dimensions and distances of the ossic...

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Bibliographic Details
Published in:European archives of oto-rhino-laryngology 2016-09, Vol.273 (9), p.2411-2417
Main Authors: Kaftan, Holger, Böhme, Andrea, Martin, Heiner
Format: Article
Language:English
Subjects:
Cadaver
Head and Neck Surgery
Humans
Imaging, Three-Dimensional - methods
Incus - surgery
Materials Testing
Medicine
Medicine & Public Health
Models, Anatomic
Neurosurgery
Ossicular Prosthesis
Ossicular Replacement - instrumentation
Ossicular Replacement - methods
Otology
Otorhinolaryngology
Prosthesis Design
Stapes Surgery - instrumentation
Stapes Surgery - methods
Temporal Bone - diagnostic imaging
X-Ray Microtomography - methods
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Summary:Prostheses replacing the incus in its normal position and equipped with two joints might transfer sound as effectively as the intact ossicular chain and allow adjustment to quasi-static pressure changes. A prerequisite for prostheses development is the access to dimensions and distances of the ossicular chain which are necessary to conceptualize shape and size. Fifteen cadaveric human temporal bone specimens were investigated by means of micro-CT followed by 3D analysis. Each specimen was scanned three times: after removal of incus, after additional removal of the malleus head, and after approaching the umbo to the promontory. Artificial umbo medialization as a surrogate for quasi-static pressure changes leads to relevant variations in the distance between the upper part of the malleus and the stapes. Prostheses replacing the incus in its normal position should be equipped with a sliding ball joint or similar construction to allow adjustment to quasi-static pressure changes.
ISSN:0937-4477
1434-4726
DOI:10.1007/s00405-015-3810-7