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What is otosclerosis?

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Otosclerosis is a condition that causes hearing loss. It happens when a small bone in your middle ear -- usually the one called the stapes -- gets stuck in place. Most of the time, this happens when bone tissue in your middle ear grows around the stapes in a way it shouldn't.

Your stapes bone has to vibrate for you to hear well. When it can't do that, sound can't travel from your middle ear to your inner ear. That makes it hard for you to hear.

From: What Is Otosclerosis? WebMD Medical Reference

SOURCES:

National Institute on Deafness and Other Communication Disorders: "Otosclerosis."

American Academy of Otolaryngology: "What You Should Know About Otosclerosis."

American Hearing Research Foundation: "Otosclerosis."

Reviewed by William Blahd on January 25, 2017

SOURCES:

National Institute on Deafness and Other Communication Disorders: "Otosclerosis."

American Academy of Otolaryngology: "What You Should Know About Otosclerosis."

American Hearing Research Foundation: "Otosclerosis."

Reviewed by William Blahd on January 25, 2017

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How many people are affected by otosclerosis in the U.S.?

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