I feel my teeth are weak.i am geeting bleeding on gums when am eating or brushing.its swelling.then i visited dentist.they said to me,you have got periodontal gum disease and you have to take flap surgery. 1.can i take flap surgery.how its worth to save my teeth? 2.they said to me ,we can save all expcept 4 teeth(front bottom).becoz your gums 85% getting out.so it will sustain 3 years.so how can i save those teeth?