This case helps to show what I have been discussing about occlusal issues and retaining, even mobile teeth, by restoring their bone situation.
Here was a 55-year old smoker who presented with advanced periodontal disease and all the anterior teeth were very mobile. Three were removed but 4 retained and now 3 years later are all very stable.
Here is a placement ( pilot ) radiograph so not ideal as in surgery, and the second image is another 3-years loaded showing the improvements in the bone and PDL of the first premolar.
Just some thoughts on the ideas of trying to retain the patients own teeth, although I know we all thrive on placing Implants. Sadly, I suspect he still smokes despite my advice……