**6. Conclusion**

More than half a century passed since the first cochlear implantation surgery; throughout this long period, the main advances happened in cochlear implantation were the manufacture of the implant itself, surgical technique showing a lot of refinement rather than changes, and also the possibility of surgery nowadays to be performed under local anesthesia. The ongoing advances in cochlear implants and refinements of the surgical techniques have improved the outcomes of cochlear implantation and allowed for hearing preservation in case of preoperative residual hearing.
