I am a smoker and I won't quit. Will I still benefit from the treatment of periodontitis?

Smoking causes periodontitis and that is a fact. Another fact is that non-smokers have  better results after periodontal treatment  than smokers. This does not mean that smokers will not benefit from the treatment of periodontitis. If you are a smoker you should know that you carry an extra risk factor for periodontitis, while if you choose to quit, you automatically benefit from the periodontal treatment the same way as if you never smoked. And that stands even for those that heavily smoked for years. But, the destruction  on the bone and the supporting tissues of teeth that has happened over the years does not change.