When the outer hard surfaces of your tooth are cracked, chewing can cause movement that irritates the inner soft tissue called the pulp. Extensive cracks can lead to infection of the pulp, which can spread to the bone and gum tissue surrounding the tooth. Cracked teeth show a variety of symptoms, including pain when chewing or temperature sensitivity. There are different types of cracks: craze lines, fractured cusp, cracked tooth, split tooth, and vertical root fracture. Your endodontist will discuss treatment options based on the type, location, and severity of the crack.