To allow a better ET exposure, the facial recess is first opened, the incudostapedial
and incudomalleolar joints are disarticulated, and the incus is removed.
It is important to note that patients with eroded, but still connected, incudostapedial
joints were excluded from this study.
7) RA is a disease characterized by inflammation of the synovial membrane of the diarthrodial joints, which include arthrodesis of the middle ear, (incudomalleolar and incudostapedial
joints) causing CHI in up to 1.
This condition includes: synovial destruction of the incudostapedial
(Incus, see diagram) and incudomalleolar (Malleus, see diagram) joints, which help transmit vibrations in the inner ear that are perceived as sound; these, like other joints in the body, can be affected by RA.
In the meantime, the posterior external ear canal wall was worn thin downward to expose the incudostapedial
joint and stapes, and to eliminate the infectious foci in the posterior tympanum.
After exposure of the mastoid cortex and temporal bone, cortical mastoidectomy performed, short process of incus identified; then the posterior tympanotomy done in the triangle between facial nerve, chorda tympani nerve and small piece of bone left near the tip of the short process of incus, the incudostapedial
joint identified just below and behind the oval window the round window niche is identified.
joint separation is the most common ossicular injury and is seen as widening of the joint on CT.
There are reports of luxation of the incudomalleal or incudostapedial
joints and the dislocation of the stapes from the oval window , but they are mostly the consequence of an attempt of extraction by inexperienced clinician.
All residents totally recognized the stapes, long process of the incus, and incudostapedial
joint through the endoscopic approach, while 80.
66%) and incudostapedial
joint was involved in 2 cases (33.
Disarticulation of the incudostapedial
joint and/or incudomalleolar joint may occur, so it is extremely important to carefully examine both joints in order to achieve the best potential outcome for hearing.
Posterior growth may extend further, involving the incudostapedial
joint and the stapes suprastructure, as well as up towards the incudomalleolar joint, around the incus, and into the attic.