**5. Conclusions**

In conclusion, this review included a large number of studies reporting the effectiveness of CI in suppressing disabling tinnitus in SSD patients when conventional treatment is insufficient. Tinnitus improvement is maintained in the long-term (>12 months). Considering the positive effect observed in all the studies, CI indication deserves to be more widely considered in such patients.

**Author Contributions:** H.T.-V. designed the plan of the article, contributed to the manuscript draft, and closely reviewed and revised the whole article critically for important intellectual content. S.A.I. made the literature review and data collection, wrote the manuscript draft, conceived and designed the tables and figures, and interpreted the data. M.M. and A.M. participated in the conception of the work, contributed to the article plan, and reviewed the article. P.R. participated in drafting the work and data collection. C.-A.J. contributed to data collection and analysis. K.K.S.A. participated in the quality assessment and reviewed the whole article. E.C.I. reviewed the whole article. All authors have made substantial contributions to this manuscript. They gave their final approval of the version to be published; and agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** The authors acknowledge the support from the Paris Hearing Institute from Foundation pour l 'Audition (FPA IDA09). They also thank Philip Robinson and Xuan Thai-Van for proofreading the article.

**Conflicts of Interest:** K.K.S.A. is employed at the Cochlear Technology Centre, Mechelen, Belgium. No further conflict of interest is reported by the authors.
