Anterior teeth protrusion manifested as teeth protruding outside the normal range, belongs to the malocclusion, if not corrected in time will affect the other teeth and oral health, and congenital genetics and acquired habits related to the specifics are as follows: 1, genetic factors: some patients with protruding anterior teeth are genetically regulated, and can not be improved; 2, bad habits: thumb-sucking, pencil, habitual tongue out and other bad habits under the long-term role of the teeth, resulting in tooth ectropion, the formation of anterior protrusion of the teeth, need to be corrected in a timely manner.