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This paper studies the changes in speech discrimination following stapes surgery in patients with advanced otosclerosis. Two thirds of these patients showed a postoperative improvement in the discrimination score with obvious correlation with closure of bone-air gap. The results were slightly worse in comparison to those obtained on otosclerotic patients with good bone conduction. In advanced otosclerosis even a minimal impairment in bone conduction and/or an incomplete closure of the gap interfere with discrimination.
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Iurato et al. (2010) studied this question.
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