The teeth next to the incisors are called lateral incisors, and humans generally have two sets of teeth, the milk teeth and the permanent teeth. The milk teeth generally have 20 teeth, which are medically known as the milk incisors, milk cuspids and milk molars. The milk incisors are divided into 2, namely the milk central incisors and the milk lateral incisors. The central incisor is often referred to as the incisor, and the teeth next to it are the lateral incisors. There are generally 32 permanent teeth, which are medically called incisors, cuspids, premolars and molars. There are two types of incisors, the first one is the incisor, the central incisor, and the tooth next to it is the lateral incisor. Generally, the central incisors are larger and the lateral incisors are smaller. Because it is the least functional tooth in the whole mouth. Therefore, clinically, it is often smaller, some people can be congenitally missing, and some people will have congenitally missing lateral incisors, and some are too small teeth.