The service life of a cracked incisor depends mainly on the depth of the crack. If the crack is superficial and no obvious sulcus has been formed and the patient has no obvious pain or other discomfort, it can be left untreated and the service life of the affected tooth will generally not be significantly affected; if the crack is deeper and a sulcus has been formed, or the patient has developed symptoms such as pain from hot and cold stimulation and biting pain, it is necessary to seek medical treatment in a timely manner, and if necessary, a crown can be made to protect the affected tooth, and the service life of the affected tooth can be basically normal after treatment. If the crack is very deep and even reaches the root of the tooth, and there is obvious biting pain or gum swelling, it is necessary to consider extraction after the diagnosis. It is recommended that if you find a cracked tooth, you should actively seek medical examination and carry out different treatments for different situations, and pay attention to not chewing hard objects with the affected tooth as much as possible to avoid secondary damage.