The age group that needs to be considered for a baby’s anticuspension (dentition) is whether it is pre-school or post-school age. Pre-school age after simple correction, the results are very good; after school age children are relatively complex, need professional orthodontist as well as surgeons to work together to achieve good results. Preschool babies anti (alveolar) generally have to be considered from several aspects, oral bad habits caused by preschool babies anti (alveolar), such as abnormal swallowing, as well as breastfeeding posture is incorrect, including changes in the structure of food, bad habits, such as children imitating film and television dramas or mandibular protrusion, repeated protrusion of the lower jaw can lead to the baby anti (alveolar). Orthodontic treatment is generally simple, such as movable braces, functional braces, after a few months of correction can often achieve very good results.