It is important to analyze the situation on a case-by-case basis, as the roots of the child’s upper front teeth (milk teeth) may have already begun to resorb by this time, making orthodontic treatment inappropriate. In addition, the orthodontic treatment of milk teeth (retrognathism) greatly reduces the possibility of permanent teeth, but does not completely prevent permanent teeth from being “grounded. Malocclusion can be hereditary, and if the father has a “diastema”, the child is likely to develop it as well. Orthodontic surgery is required if there is a severe jaw deformity, otherwise orthodontic treatment is all that is needed.