I just answered an interesting question that came in about periodontal disease. She did not floss or brush before the age of 26. It seems a bit odd. Maybe she meant that she did not brush or floss often before then.
Here is the link to this question on periodontal disease.
Anyway, it sounds like her dental hygiene troubles are fairly advanced. I’ve listed the two action items that I beleive she needs to take to get some relief. The big problem is that I do not know if she will follow through.
Knowledge without action is practically useless. You must take massive action to succeed in any endeavor that you wish to take on. This is the truth about us as human beings. I hope she has what it takes to take a firm grip on the reigns of her periodontal health.