I was 74 when my teeth started getting loose and thought I would lose them. After using chlorine dioxide for three days, they began to tighten up, which is why I use chlorine dioxide to clean my teeth. That was five years ago. Also, my partial plate stays spotless when I keep it in a dish with 6 drops of activated chlorine dioxide. It remains so bacteria-free that it looks new and the discoloration on my remaining teeth has disappeared. ~ James Smith, CA