Otology & Neurotology

Skip Navigation LinksHome > August 2014 - Volume 35 - Issue 7 > Is the Prosthesis Length in Malleostapedotomy for Otoscleros...
Otology & Neurotology:
doi: 10.1097/MAO.0000000000000448

Is the Prosthesis Length in Malleostapedotomy for Otosclerosis Revision Surgery Predictable?

Kaftan, Holger*; Böhme, Andrea; Martin, Heiner

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Hypothesis: The prosthesis length in malleostapedotomy for otosclerosis revision surgery can be calculated if the prosthesis length of previous conventional incus stapedotomy is known.

Background: Malleostapedotomy is used in revision surgery for otosclerosis in case of severe incus erosion and malleus or incus fixation.

Methods: Fifteen cadaveric human temporal bone specimens were investigated by means of micro-CT followed by 3D analysis. The distance between the incus and the stapes footplate as well as distances between the malleus and the footplate were measured and compared.

Results: The required length of virtually bent prostheses corresponded approximately to the 1.5-fold of virtual stapes prostheses in 93%. The addition of 2 mm predicted the required prostheses length almost correctly in 80%.

Conclusion: The clinical practice will show whether a preoperative calculation of expected prosthesis length in MS based on the length of the formerly used stapes prosthesis is possible and helpful.

Copyright © 2014 by Otology & Neurotology, Inc. Image copyright © 2010 Wolters Kluwer Health/Anatomical Chart Company

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