本实验是研究用活动扩弓导板治疗单侧后牙反(牙合)时,下颌骨功能性移位的改善及髁突变化情况。研究对象是6名7～11岁儿童,单侧后牙反(牙合)且下颌中线向反(牙合)侧偏移2mm以上,ICP位髁突位置正常。 研究方法 Ⅰ阶段,用覆盖(牙合)面的平面扩弓导板消除因双侧咬合不平衡引起的不对称神经肌反射(该 This experiment was to investigate the improvement of mandibular functional displacement and changes of condyle during the treatment of unilateral posterior crossbite with active expanding guide plate. Six children aged 7 to 11 years old with unilateral posterior crossbite and mandibular midline opposite to the occlusal side offset by more than 2 mm. The condylar position of ICP was normal. In the first phase of the study, the asymmetric neuromuscular reflex due to unbalanced bilateral occlusion was eliminated by a planar expansion guide covering the occlusal surface