Final answer:
Ankylosis of spongy bone around the oval window is called otosclerosis and can result in hearing loss.
Step-by-step explanation:
Ankylosis of spongy bone around the oval window is called otosclerosis. Otosclerosis is a condition in which abnormal bone growth occurs in the middle ear, causing hearing loss. In otosclerosis, the abnormal bone growth can lead to the fusion or ankylosis of the stapes bone to the oval window, preventing normal sound transmission.
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