A few corrections…starting with handy’s ridiculous statement:
The implanted portion of a cochlear implant system is inserted into the cochlea…hence the name cochlear implant. The auditory nerve connects the cochlea to the brainstem, and is never interfered with during the implantation surgery. If you knew anything about the anatomy of the ear, you would know that it is impossible to sever the auditory nerve during a cochlear implantation surgery…even accidentally. Your statement that they “often, not always” cut the auditory nerve is flatly false.
The reason why the remaining residual hearing is destroyed in the course of the implantation surgery is not because of any interference with the auditory nerve. It is because the implant itself will damage or destroy the remaining hair cells that line the interior of the cochlea. As I stated earlier in this thread, the destruction of residual hearing by the cochlear implant is the primary reason why one of the most important criteria for cochlear implant candidacy is that the person’s residual hearing is of no value in acquiring oral communication skills.
Cochlear implants are no longer considered experimental. There are a number of cochlear implants that have been approved by the FDA for non-experimental, non-investigative use. Newer cochlear implants, such as the Nucleus-24, do have to go through clinical trials, and during that time may rightly be considered experimental. Once they receive FDA approval, the newer cochlear implant models are no longer considered experimental.
As for risk, I think that this has been exaggerated. Any surgery carries with it a certain level of risk, so cochlear implantation surgery is hardly unique in that regard. But compared to other kinds of surgery, such as open heart surgery, it is considerably less risky.
However, there have been recent reports that there appears to be an increased incidence of bacterial meningitis in patients that have received cochlear implants. The precise reasons for this apparent link will require further investigation. Most cochlear implants are placed in children, a population that has a much higher incidence of otitis media than adults…that is my personal prime suspect for this apparent link.
And although this isn’t really a correction, I’d like to respond to another one of handy’s remarks regarding cochlear implants:
The same thing goes for hearing aids. I’m severely-to-profoundly deaf, and without my hearing aids I can’t hear hardly a damn thing. I can’t wear the hearing aids when I’m swimming, bathing, etc. However, that doesn’t make me think that the hearing aids are without value. You know what I do in those situations where I can’t wear the hearing aids? I cope. It isn’t really a big deal.
And besides, there are certain advantages to not wearing hearing aids when sleeping. I can get peace and quiet anytime when I’m going to sleep.

