How can i stop my teeth from cracking and make them stronger?

Good occlusion: Cracking, unless you have dentinogenesis imperfecta (a disease of malform tooth enamel/dentin), is a sign of poor occlusion. Most often malocclusion can be treated orthodontically by braces or prosthodontically with crowns. In many instant it could be treated with just occlusal adjustment (selectively grinding of interferences on tooth surface). Good occlusion will preserve teeth for life.

C UR Family Dentist: First have your teeth examined for cracks, failing restoration, and to make sure you don't have a malocclusion. You may need restorations, occlusal adjustment , night guard, and/or orthodontic rx. Stop chewing on hard things, such as ice, hard candy, meat on bones, etc. Avoid foods high in sugar and acid. Fluoride rx may help. This not a self-fix problem...See your family dentist.