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[Some structural characteristics of articulation of the incus and stapes in man].

Structural characteristics of human incudostapedial articulation (ISA) have been studied on a series of histological sections from temporal bone decalcified pyramids in three planes and by means of macro-micropreparation of tympanal structural elements from 96 human fetuses at various terms of gestation. It was established that the surface of the lenticular process has a spherical form. Its length surpasses its width. The articular surface on the head of the stapes presents a dome-shaped lacuna. The capsule is usually thicker in its posterior part than in the anterior one. It can endure deviation of the long lenticular process up to 3 mm without rupture. When the deviation overruns 3.5 mm, the articular bursa and round ligament of the base of the stapes break. This property of the capsule should be kept in mind when operating on the stapes.

Fetus↗
PubMed1977

[Incus homografts (author's transl)].

The problem of reconstruction of the ossicular chain is still partly unsolved. A possible way of solving this problem is with a homograft in cases with total or partial ossicular chain defect. The method of preparing the homografts in our Clinic is described. The formation of an ossicular bank is quite easy, the procedure for preparing adequate implants simple and safe. This is a preliminary report concerning patients under review from 3--24 months, on whom the described method was used.

Ear Diseases↗