下颌前突,前牙反是牙、、颌畸形中较多见的一种发育畸形。它不仅使面下1/3发生明显畸形影响咀嚼功能和发音,严重者造成颜面不对称,导致颞下颌关节紊乱综合病。作者采取活装垫矫正器,配合固定矫正器,头帽颏兜多种方法,对乳牙期、替牙期、替牙完毕的骨骼型、牙源型反试行矫治,收到较好效果。 Mandibular protrusion, anterior crossbite is a developmental deformity that is more common in teeth, gallbladder, and jaw deformities. It not only makes obvious facial deformity affect the chewing function and pronunciation of the lower 1/3, but also causes facial asymmetry in severe cases, resulting in TMJ disorders. The author adopted a living  pad orthotic, with a fixed orthotic, headgear chin pocket a variety of methods, deciduous teeth, dentition, teeth for the completed skeletal, orthodontic trial correction, received good results .