A Answers (2)
Mehmet Oz, MD, Cardiology, answeredHairline cracks in the teeth can indicate tooth grinding, the sleep disorder bruxism, or mental stress.
Tiny cracks in teeth are usually not a dental emergency unless they are causing pain. Although a small amount of pain might be tolerable, it can increase if the crack becomes bigger. Cracks can also create places for bacteria to grow, causing a cavity. This is why seeing a dentist frequently is so important. The best way for a dentist to detect a crack is upon visual examination, since some cracks are not visible on X-rays.