Is the prosthesis length in malleostapedotomy for otosclerosis revision surgery predictable?

Abstract

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.

• Authors: Holger Kaftan, Andrea Böhme, Heiner Martin
• Journal: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology (Otol Neurotol) Vol. 35 Issue 7 Pg. 1150-5 (Aug 2014) ISSN: 1537-4505 [Electronic] United States
• PMID: 24836596 (Publication Type: Journal Article)

Topics

• Humans
• Incus (surgery)
• Malleus (surgery)
• Ossicular Prosthesis
• Otosclerosis (surgery)
• Reoperation
• Stapes Surgery
• Temporal Bone (surgery)