Root canal treatment usually lasts about 5 to 10 years. If the patient’s chewing habits and daily care are not in place the tooth may fracture thus shortening its life. 1. Root canal treatment is a treatment technique for pulp, tooth, and root tip lesions by removing necrotic material from the root canal, properly sterilizing it, and filling the root canal. Root canal patients usually pay attention to cleaning after meals and daily care, regular brushing and rinsing, diet without sticky and hard food, generally can be used for 5 to 10 years, if the maintenance of better patients may also be maintained for life. 2. After root canal treatment, the pulp is completely removed, cutting off the main source of nutrients for the dentin and dentin, the dentin will become dry and lose elasticity. At this time, the strength of the tooth tissue will be reduced, in chewing too hard food or daily care is not in place, the tooth may fracture and thus shorten the service life. After root canal treatment, you can avoid using the affected tooth to bite hard food, brush or floss carefully, do a good job of oral cleaning, and have regular oral checkups.