Congenital loss of lateral incisors is very important for oral health. Congenital loss of lateral incisors will have effects on mastication function, esthetics, articulation function, periodontal problems and so on. 1. Chewing function: food enters the mouth, missing teeth lead to reduced chewing function, and the position of lateral incisors will lose the cutting function, leading to reduced chewing efficiency, thus affecting gastrointestinal function. 2. Aesthetics: Loss of lateral incisors can lead to an unattractive normal smile, thus affecting the patient’s daily socialization. 3. Pronunciation function: Lateral incisors play a big role in pronunciation function, and missing lateral incisors can lead to symptoms such as wind leakage, unclear bite, and fuzzy speech. 4. Periodontal problems: the gap between the missing teeth will slowly tilt and elongate, and gum recession will occur leading to loose teeth and loss of elasticity of soft tissues. Therefore, if there is a congenital absence of lateral incisors, go to the hospital in time, under the guidance of the doctor for appropriate treatment.