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The mean preoperative bone-conduction threshold of the patients was 16.27 ± 5.47 dB and the mean postoperative bone-conduction threshold was 14.72 ± 6.11 dB and there was a significant difference. The mean preoperative air-bone gap of the patients was 41.81 ± 10.51, and the mean postoperative air-bone gap was 19.90 ± 12.48, and the difference was statistically significant. Conclusion Mesna prevented hearing loss related to type 4 tympanosclerosis and prevented the formation of new sclerotic structures in our follow-up period. We believ