Dental Implants in the Upper Jaw

Greg, a patient, asks us:
I suffered the loss of the entire roof of my
Mouth, Maxilla, Upper Jaw, and teeth. This was all caused by an auto
accident thirty years ago in which a drunk driver hit the vehicle I was in
head on.

Currently I am wearing and have been fitted with a Prosthesis
that looks like a big denture. Would dental implants work for me ? I
have been to oral surgeons, and have had different views
ranging from yes to no and maybe. I was told that Bone Grafting is the
only way to go and then told by other specialists that I definitely DO
NOT want bone grafting as those areas are very risky and there are good chances
that it would not take. Any suggestions. I look forward to your comments.