Otosclerosis
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Otosclerosis is a hearing condition in which the stapes in the ear becomes attached to the surrounding bone by an abnormal bone growth. Sound transmission is progressively impaired so that hearing in the affected ear deteriorates.
The condition can be cured by having a stapedectomy. This procedure involves bypassing the stuck stapes by making a hole through it to the outer chamber of the inner ear and placing an artificial bone from the still moveable healthy hearing bones through the hole to the inner ear.