From what you have heard by people emailing you or on the forum which other severe irreversible health damages could there be?
- Inability to open their mouth fully (i.e. poor range of motion). Very common.
- Crunchy joints (very common)
- Losing teeth if roots are hit during surgery (not common but happens)
- Bad bite after surgery (fairly common). This can be an open bite, crossbite, etc. Edge to edge seems to be the most common post-op bite problem.
- Entire death of upper jaw - this can happen if doing a 3 piece (happened once).
- Actual death - we only saw this once, and it was on the other jaw forum, but he died due to an artery being hit during surgery.
These last two are rare, so don't freak out.
The list isn't comprehensive. I'd have to go through emails and look. But that's my answer off the top of my head.
Then there are the mental issues. I've seen many dozens of people who can't cope with the new face, feel their lost their ethnicity, etc. Sometimes there's truth to their concerns, sometimes there isn't.