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Tripod allograft in reconstruction of incudal lesions

Published online by Cambridge University Press:  29 June 2007

Michal Luntz ,
Talia Mark Bentacur  and
Jacob Sadé
Michal Luntz*
Affiliation:
Department of Otorhinolarynology, Sheba Medical Center, Tel Hashomer, Hearing Research Laboratory. School of Medicine and the Biomedical Engineering Program, Tel-Aviv University, Ramat-Aviv, Israel
Talia Mark Bentacur
Affiliation:
Department of Otolaryngology, Sapir Medical Center, Kfar-Saba, Israel
Jacob Sadé
Affiliation:
Hearing Research Laboratory, Chair for Hearing Research, Sackler School of Medicine and the Biomedical Engineering Program, Tel-Aviv University, Ramat Aviv, Israel
*
Michal Luntz, 22 Geller Street, Kfar-Saba 44261, Israel
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Abstract

Long-term results of allograft ossiculoplasty with erosion of the long process of the incus in 44 patients are described. The pyramidal-shaped allograft leans on the stapes, the remaining part of the incus and the side of the malleus - forming a ‘tripod’ shape or construction.

The study includes two groups of patients: group A (34 patients) in whom the pre-operative three-frequency average air-bone gap was 20 dB or more and group B (10 patients), in whom the pre-operative air-bone gap was less than 20 dB. In the latter group the indication for surgery was not their hearing loss, but a different pathological condition (infected retraction pocket, a cholesteatoma, etc.) which necessitated surgical disconnection of the chain during the operation.

The average period of follow-up 46 months for group A and 24.9 months for group B. In group A, the preoperative average air-bone gap was 33 dB. Following surgery, the air-bone gap was 20 dB or less in 27 ears (79 per cent), and 10 dB or less in 18 of them (53 per cent). In group B, pre-operatively, the average air-bone gap was 11 dB. Following surgery, the air-bone gap was either better than before the operation or did not increase by more than 5 dB in eight patients (80 per cent).

Comparison of the audiometric results of 20 patients after mean follow-up times of 23.8 months and 64.9 months shows that no deterioration of hearing occurred in the intervening period. Graft extrusion was not observed in any of the operated ears.

Keywords

TympanoplastyTransplantationhomologous
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 108 , Issue 3 , March 1994 , pp. 206 - 211
Copyright
Copyright © JLO (1984) Limited 1994

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