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skos:definition |
MSH: An implant used to replace one or more of the ear ossicles. They are usually made of plastic, Gelfoam, ceramic, or stainless steel.,UMD: Implantable prostheses designed for partial or total replacement of the small middle ear bones (i.e., ossicles) that transmit sound. These prostheses are typically made of bioactive materials such as hydroxyapatite, bioactive glasses, silastic, stainless steel, titanium, or high-density polyethylene sponge (HDPS); some materials require placement of cartilage between the prosthesis and the tympanic membrane to prevent extrusion. Sculpted autografts and allografts are less frequently used as ossicular prostheses. Ossicular implants are used mainly to reestablish the middle ear sound-conducting mechanism; they are also used to repair congenital abnormalities in the middle ear ossicles, improving patient's hearing capabilities. Prostheses intended to replace the stapes, stapes and incus, or the total ossicular bones are available.
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