天然牙全部缺失后,口腔空虚,形成潜在的义齿间隙。中间区(neutral zone)位于潜在义齿间隙内,在此处,舌向外的压力和唇、颊向内的压力相平衡。全口义齿中间区所探讨的主题,是在无牙口腔中,如何安放牙齿,使肌肉产生的力量,有利于义齿的稳定。儿童口腔中,牙齿在周围肌肉(舌、颊、辱)影响下荫出。牙齿的位置、牙弓外形和咬 After all the missing natural teeth, the mouth empty, forming a potential denture gap. The neutral zone is located in the underlying denture gap, where the outward tongue pressure equilibrates the lip and cheek-to-center pressures. The theme of the full denture in the middle region is in the toothless oral cavity, how to place the teeth, so that the power generated by the muscles is conducive to the stability of the denture. Children's mouth, the teeth under the influence of the surrounding muscles (tongue, cheek, shame) under the shade. Dental position, dental arch shape and bite