前牙反(牙合)俗称地包天,是口(牙合)系统常见的一种错(牙合)畸形,对(牙合)、颌、面的生长发育及口腔功能影响很大,尤其是早期骨性前牙反(牙合),伴有不同程度的骨骼畸形,其不良影响更大,治疗更为困难。 前牙反(牙合)的形成,有先天的遗传因素及诸多的后天因素,先天因素目前仍无法用医学手段来控制,后天因 Occlusal commonly known as anastomosis, is a common malocclusion (Occlusal) malformation system, the (occlusion), jaw, surface growth and oral function of a great influence, especially Anterior bony anterior crossbite (occlusion), with varying degrees of skeletal deformities, the greater the adverse effects, the treatment more difficult. The formation of anterior teeth (occlusion), there are innate genetic factors and many acquired factors, congenital factors are still unable to use medical means to control the acquired