This is a hard subject for me because I went through something very similar, It's not something I usually ever talk about but...... I am going to be really honest so please don't take offense......what you have described here is not the same as just having teeth pulled and it is nothing to mess around with, so, if you can do without vaping that would be your very best bet, seriously, that would be your very best bet.
You want to give yourself the best chance of getting rid of your long term infection so your bone graft has a chance to take.
If nothing else at the very least go nic free. As you said, nicotine constricts blood vessels and inhibits healing which is also a contributing factor in your long term infection not going away, and, as you have found lead to an osteomyelitis (bone infection) resulting in bone loss as the infection eats away at it and as long as the infection remains it will continue to eat away at the bone... it can lead to the loss of your jaw and doubles your risk for cardiovascular issues
(I suffered 3 separate heart attacks), bacterial endocarditis, glomerulonephritis, sepsis....
You want to give yourself the best chance of getting rid of your long term infection so your bone graft has a chance to take.
If nothing else at the very least go nic free. As you said, nicotine constricts blood vessels and inhibits healing which is also a contributing factor in your long term infection not going away, and, as you have found lead to an osteomyelitis (bone infection) resulting in bone loss as the infection eats away at it and as long as the infection remains it will continue to eat away at the bone... it can lead to the loss of your jaw and doubles your risk for cardiovascular issues
(I suffered 3 separate heart attacks), bacterial endocarditis, glomerulonephritis, sepsis....