There are still no medication which can completely cure tinnitus. However, cochlear implants can help with the noisy sensations like ringing and buzzing in the ear in the treatment of patients with single-sided deafness. Get more information about how cochlear implants can help with tinnitus here:
https://lifelonghearing.com/science/a-modern-help-for-tinnitus/ 
https://blog.medel.com/cochlear-implants-tinnitus-cure