And I think for many it will be usefull too

Thanks for your advice, you really helped a lot, I will use it.

Modern dentistry is advancing very rapidly, with new methods of periodontal laser treatment appearing https://villagedentalmedicine.com/laser-treatment-of-periodontal-disease-features-pros-and-cons/ , and more. If you want to learn more about it, I suggest you go to the link and read. I'm interested, as I'm currently doing the treatment myself.