Front Teeth - Solution if anything should happen?

If the "cracks" are vertical, they are called stress fractures. Pretty harmless unless they are really deep. Do you grind your teeth? If so get to your dentist and get a night guard. Sometimes the dentist will just recommend a crown for the tooth, you won't lose the tooth if you fix it before it breaks. Don't wait to go to the dentist, things only get worse. The reason these cracks are more noticeable is because they pick up stain easier. Just go to the dentist, it's not as bad as you think.