Smoking and Dental Implants with and Without Bone Grafts

I would say if a person stopped smoking then go ahead and place the implants. Smoking negatively affects blood flow to the bone and tissues surrounding the gums and teeth, which impairs bone healing.
I would tell a smoker to quit for 1 month prior to implant placement and to not start back smoking until they are healed. No one stage placement or immediates. Bury implant for healing and place extra implants in arch, eg., if you planned on 6 then place 8. If patient is a heavy smoker, all bets off.

How long should wait to have implant procedures performed after quitting smoking?You'll be happy to hear that the answer is immediately!The real concern is for people who don't quit and continue to smoke immediately following the procedure.I hope you found this info to be helpful,Dr Champagne

You can begin dental treatment any time after smoking regardless of bone graft or no bone graft, however, 2 weeks is what is usually suggested. 
Congratulations on quitting! 

Smoking has immediate effects on treatment. You can quite 5 minutes before surgery. As long as you don't smoke after surgery during the healing phase or thereafter, you should not have any of the deleterious effects of smoking. 

Smoking can adversely affect the success of dental implants. It is protocol to quit smoking at least 2 weeks prior to implant placement, though longer periods of time can certainly be beneficial. 

Please be aware, that formed smoking habits may have permanent damages to your tissues even after quitting.  That said, patient's who smoke still get dental implants.  However, your Board Certified Periodontist may choose longer healing periods and/or a conservative surgical approach.