I am 38 years old and I have periodontal disease with bone loss. Can I save my teeth? (Photo)

I already had a scaling. The doctor advised me for orthodonotic treatment so that the gaps can be covered and after that he suggest for flap surgery and extraction of front lower teeth with bone graft for rest adjoining front teeth in lower jaw. please suggest what should I do and Can i save all my teeth. My teeth are not mobile except front one lower teeth.

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