常规制作的上颌垫式矫治器是矫治前牙反错畸形的手段之一。但因其固位不佳而影响疗效 ,为此我们对该矫治器固位系统进行了改良 ,并用其治疗了 8例乳前牙反的儿童 ,因加强了固位 ,取得了比较理想的矫治效果。临　床　应　用1 病例选择　所选病例为近半年来我科就诊的 3 Conventionally produced maxillary  pad-type appliance is one of the means to correct the ankle malocclusion. However, due to its poor retention and affect the efficacy, for which we have the appliance retention system was modified and used to treat 8 cases of ankle sphenoid children, because of strengthening the retention, and achieved a more ideal Correction effect. Clinical Applications 1 Case Selection Selected cases for nearly six months our department 3