I've heard various quotes about various things. Nicotine does leave your system rather quickly, but depending on the length and severity of the surgery, doctors will recommend different things. I will say, that during my various oral surgeries, well every single "handout" on self care after the surgery indicated that you should stop smoking after the surgery. When I dug a little deeper, there were actually oral surgery experts saying that quitting nicotine and smoking should be done up to six months before those surgeries, with varying degrees of urgency. They actually did appear to do some research, and most folks who quit before hand have better outcomes. Their consensus was, however, that one wanted one's gums and mouth to be in good shape before the surgery, not just afterward, and that increased the risk of implants failing. I did have an implant fail, but my oral surgeon was nice enough to replace it for free (still hurt a whole bunch, however).
I wish I'd known that info going in, but yes, various doctors and surgeons are going to recommend different things.
I would agree on trying some "new to you" juices without nicotine, so you aren't associating them with a "nicotine buzz" although you may find some of your regular flavors from day to day don't have a huge change in flavor without nicotine (a lot of that will depend on how much and what type of nicotine you used). If you enjoy a throat hit, I might also look at slightly higher PG juices and possible an additive named "Flash" that's been mentioned and I think it also can increase the sensation of "throat hit." So may menthol, etc.
Best of luck, with both the surgery and your 0 nic juices.
Anna