You're not going to find good data because of the length of time it's been approved in the USA. The Lap-Band brand bands were just FDA approved in 2001 and the Realize brand bands were approved in 2007. As with any new medical device, changes are made as problems are found, and that has been the case with the Lap-Band as well. A good example is how they used to use 4cc bands but they now have found bands ranging from 9cc to 14cc to be safer and more effective long term. So, the only place you will now find the older model bands used is in places like Mexico (which is one of the reasons most US surgeons won't touch patients banded in Mexico).
However, with that said, I have met more than a few on this board who've had their bands over 6 years, and that's with the smaller 4cc bands too.
The Lap-Band is no different than any other implanted medical device. Pace makers, insulin pumps, and artificial joints won't last forever either. Just like them, the Lap-Band does require ongoing medical supervision and if you live long enough, will inevitably need replacing/updating too,
