[Tensile strength of the stapes footplate. Pressure-induced inner ear damage in operated ears caused by TORP prostheses?].
In a recent textbook concerning ear surgery, it is recommended to put some connective tissue on the stapes footplate before introducing a TORP. This should avoid penetration of the shaft of the TORP into the inner ear. Experimental studies were performed to estimate the pressure needed for pushing a TORP through the footplate. We found those pressures to be much higher than those which might occur by increasing pressure in the external ear canal or decreasing pressure in the middle ear. This means that perforations of the footplate are not due to one big event of changing pressure, but rather by chronic irritations or foreign body reactions. Anyhow, we consider the protection of the footplate by a layer of connective tissue to be very useful.
Pau
H W
HW
HNO-Klinik des Universitätskrankenhauses Hamburg-Eppendorf.
Leitner
H
H
Hartwein
J
J
D004432:Ear, Middle / Q000473:pathology; D005549:Foreign-Body Reaction / Q000473:pathology; D006801:Humans; D009998:Ossicular Prosthesis; D011474:Prosthesis Design; D011475:Prosthesis Failure; D013201:Stapes Surgery / Q000295:instrumentation*; D013718:Tensile Strength