Malocclusion malformation of the general risk factors for hereditary factors and access to factors of the two major categories. The main factors for the genetic evolution and degradation of race, genetic factors account for approximately 30%. Acquired factors are the following:
(1) as early as primary teeth missing: there will be insufficient space, a crowded dislocation. Meng lost their lead role, when the eruption of permanent teeth in the wrong and not eruption.
(2) bad habit: that the majority of Shun habits, habits of the tongue, extending the mandibular habits, bad habit of swallowing, chewing habits, such as unilateral, can cause a variety of malocclusion.
(3) and more teeth: more teeth can cause tooth and jaw shape of the energy system disorders, among many in the incisor teeth can lead to the formation of incisors, and other space.
(4) congenital missing teeth: embryonic development and for more reasons, the third molars were missing for more of the degradation.
(5) deciduous stranded: individual teeth overdue for the shedding of deciduous teeth stranded, for the permanent teeth can lead following the eruption was an ambush and were impacted, or the wrong eruption.
(6) Rujian teeth wear inadequate: because children eat the food too soft, so some Rujian teeth than other tooth wear, which arch above the surface of teeth, a long exposure, resulting in the front or lateral movement, formed Anti-bite.
(7) There are also many local factors and systemic diseases, such as infectious diseases, malnutrition, endocrine factors, lack of vitamins, cleft lip and palate, mandibular condyle of benign hypertrophy, facial mast.