Amblyopia is a common malocclusion in children. Under normal circumstances, the root of the tooth develops 1/2~3/4 of the crown of the tooth to erupt, and the tooth that has already passed the period of eruption and still fails to erupt in the jawbone tissue is called amblyopia. Ambulatory teeth can occur at all stages of dentition. Causes of ambulatory obstruction: These include local and systemic factors. There are many local factors: `milk teeth are extracted prematurely due to trauma or severe caries, and the teeth next to them are shifted to the place where the gap is missing, cysts caused by infections at the root tips of the milk teeth, milk teeth that are not lost in time, the presence of supernumerary teeth, dental tumors, or other types of jawbone cysts or tumors blocking the eruption of the permanent teeth, the position of permanent embryos is abnormal, such as lateral growth or inverted growth, and the embryo of the permanent teeth itself is abnormally developed, and so on. Systemic factors: malnutrition, rickets, endocrine disorders (hypothyroidism, hypoparathyroidism, hypopituitarism), hereditary syndromes, and so on. Problems that may arise if ambulatory teeth are not treated in time: displacement or tilting of adjacent teeth on the labial or palatal side; loss of arch length; root resorption by compressing adjacent roots; formation of tooth-containing cysts and resorption of the jawbone by compressing them; excessively long opposing teeth, disorders in the occlusal relationship; occlusal trauma and so on. If you find that your teeth are delayed in eruption, you should consult a doctor as soon as possible for examination and timely treatment of the problem, especially eliminating the local causes of the disease as soon as possible. (1) Multiple teeth: after early extraction, some of the buried teeth can erupt. (2) Dental cysts caused by infection: some of the buried teeth can erupt after surgery. (3) Insufficient eruption space: Orthodontics to carry out the gap, usually can be erupted. (4) Dental tumor: timely removal, orthodontic traction is needed during replacement and permanent teeth period. (5) The root tip of the buried tooth has been developed or the position of the permanent tooth embryo is abnormal, which needs to be treated by orthodontic traction.