What can i use to strengten teeth?

Brush & Floss: A good electric tooth brush, used with a Fluoride containing tooth paste, dental floss, tongue cleaner and waterpik with mouthrinses twice a day in general. In specific: xylitol and recaldent have shown significant benefits in literature.

Chewing gum! : Eat a healthy diet including protein. Avoid sugar. Don't sip on sodas all day. Chew up to six pieces of sugarless gum containing either/or xylitol or recaldent - especially after means. Visit your dentist at least twice a year to check for cavities and gum disease. Avoid mouthrinses that contain sd alcohol. Don't smoke or use smokeless tobacoo.

Fluoride : Using toothpaste or rinses that contain fluoride.