What causes mandibular hypoplasia?

summary

The etiology of jaw deformity can be divided into two aspects: congenital deformity, developmental deformity and acquired deformity. According to the clinical classification, there are overgrowth, underdevelopment, odontogenic malocclusion and compound dentofacial deformity, which can form cross compound type, asymmetric dentofacial deformity and secondary developmental deformity. What causes mandibular hypoplasia? Let's talk about it

What causes mandibular hypoplasia?

Congenital deformities of jaw can be divided into unilateral or bilateral. These deformities are often associated with hypoplasia of the mandible (t-kirschner syndrome), craniofacial dwarfism, craniofacial hypoplasia, and other types of abnormal development of the first and second branchial arches.

Most of them are caused by bad nursing posture, retention or early loss of deciduous anterior teeth, congenital absence of upper permanent incisors, bad habits, insufficient wear of deciduous canine, systemic diseases and hereditary mandibular protrusion. The abnormal mesial distal relationship between the upper and lower dental arch can be manifested as mandibular protrusion, mesial malocclusion and anterior crossbite.

Abnormal neuromuscular: the asymmetry growth of maxilla and mandible after facial nerve paralysis in the early development of mandible is the deformity of this reason. In addition, open bite caused by bad tongue habit also belongs to this kind of deformity. Endocrine disorders: the typical lateral deformity is acromegaly associated mandibular prognathism.

matters needing attention

Treatment includes reconstruction of the mandible (costochondral) with autogenous bone graft. Surgery should be performed as early as possible to limit the development of facial deformities. In general, chin plasty, hyperinlay of bone, cartilage and soft tissue flaps are often used to improve facial asymmetry