Background: The insertion of the stapes piston into the vestibule provides the physical basis for a successful stapedotomy. In routine clinical practice, two different ways to handle prosthesis length are performed: (1) an individualized measurement of the stapes prosthesis length or (2) a standard prosthesis length for all cases. Objective: The objective of this study was to compare both ways of handling prosthesis length and the effect of these methods on insertional prosthesis depth. Material and Method: We retrospectively evaluated 39 patients after performing a stapedotomy for radiologically estimated vestibular stapes prosthesis insertion depth. The individual measured length data were hypothetically changed to a standard length of 4.75, 5, 5.25, and 5.5 mm, and the insertion depths were compared. Results: The individually measured prosthesis lengths led to an insertion depth between 0.2 and 1.6 mm (mean 0.74 mm). The ratio of insertion depth/vestibular depth was between 8 and 59.1% (mean 26.6%). The different assumed standard lengths led to different rates of the vestibulum positions and possible bony contacts at the vestibulum floor. Conclusion: The individual measurement led to a zero rate of the vestibulum positions of stapes prosthesis pistons with a low insertion depth/vestibular depth ratio.

1.
Bozzato
A
,
Struffert
T
,
Hertel
V
,
Iro
H
,
Hornung
J
.
Analysis of the accuracy of high-resolution computed tomography techniques for the measurement of stapes prostheses
.
Eur Radiol
.
2010
Mar
;
20
(
3
):
566
71
.
[PubMed]
0938-7994
2.
Fang
Y
,
Wang
B
,
Galvin
JJ
 3rd
,
Tao
D
,
Deng
R
,
Ou
X
, et al
MPR-CT imaging for stapes prosthesis: accuracy and clinical significance
.
Otol Neurotol
.
2016
Apr
;
37
(
4
):
321
3
.
[PubMed]
1531-7129
3.
Husain
Q
,
Lin
KF
,
Selesnick
SH
.
Stapes prosthesis length and hearing outcomes.
Laryngos¬cope,
2018
;128(3):722-6.
4.
Hüttenbrink
KB
.
Biomechanics of stapesplasty: a review
.
Otol Neurotol
.
2003
Jul
;
24
(
4
):
548
57
.
[PubMed]
1531-7129
5.
Marchica
CL
,
Saliba
I
.
The relationship between stapes prosthesis length and rate of stapedectomy success
.
Clin Med Insights Ear Nose Throat
.
2015
Jun
;
8
:
23
31
.
[PubMed]
1179-5506
6.
Pauw
BK
,
Pollak
AM
,
Fisch
U
.
Utricle, saccule, and cochlear duct in relation to stapedotomy. A histologic human temporal bone study
.
Ann Otol Rhinol Laryngol
.
1991
Dec
;
100
(
12
):
966
70
.
[PubMed]
0003-4894
7.
Schuknecht
HF
,
Applebaum
EL
.
Surgery for hearing loss
.
N Engl J Med
.
1969
May
;
280
(
21
):
1154
60
.
[PubMed]
0028-4793
8.
Vandevoorde
A
,
Williams
MT
,
Ukkola-Pons
E
,
Daval
M
,
Ayache
D
.
Early Postoperative Imaging of the Labyrinth by Cone Beam CT After Stapes Surgery for Otosclerosis With Correlation to Audiovestibular Outcome
.
Otol Neurotol
.
2017
Feb
;
38
(
2
):
168
72
.
[PubMed]
1531-7129
9.
Zaoui
K
,
Kromeier
J
,
Neudert
M
,
Boedeker
CC
,
Zahnert
T
,
Laszig
R
, et al
Flat panel CT following stapes prosthesis insertion: an experimental and clinical study
.
Eur Radiol
.
2012
Apr
;
22
(
4
):
837
44
.
[PubMed]
0938-7994
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
You do not currently have access to this content.