If your right ear is dead, it does not mean that you will lose hearing in left ear. Unless there is any cause which will damage hearing in any ear. So you have to be extremely careful about your left ear. In no case should it be operated on. Other precautions (attachment) to be observed. No surgery can restore hearing in the dead ear. Cochlear implant is performed on patients with both dead ears, it involves putting electrodes into the inner ear, and a aid is worn outside. It is not reccomended for one ear deafness.