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目的 :评估面具前方牵引矫治器在儿童骨性前牙矫治中的临床效果。方法 :用面具前方牵引矫治器进行矫治 ,治疗前后拍摄头颅定位侧位片 ,并进行矫治前后的X线头影测量分析比较。结果 :SNA角增大 2 .7°。SNB角减小 1.0°。ANB角增大 5 .2°。Yaix角增大 1.2°。U1 SN角增大 5 .2°。前牙反解除 ,侧貌得到明显改善。结论 :面具前方牵引矫治器 ,有促进上颌骨向前发育、抑制下颌骨向前发育的作用 ,通过调整上下颌骨的相对位置关系 ,改善儿童骨性前牙反 ,为今后取得良好的颅、颌、面关系打下基础
OBJECTIVE: To evaluate the clinical effect of traction appliance in front of masks on orthodontic treatment in children with bony anterior teeth. Methods: The appliance was used to treat the orthodontic appliance in front of the mask. Before and after treatment, the cephalometric lateral radiographs were taken and compared before and after X - ray. Results: SNA angle increased by 2.7 °. SNB angle decreases by 1.0 °. ANB angle increased by 5.2 °. Yaix angle increased by 1.2 °. U1 SN angle increased by 5 .2 °. Anteversion of anterior patella, the profile has been significantly improved. Conclusion: The traction appliance in front of the mask can promote the forward development of the maxilla and inhibit the forward development of the mandible. By adjusting the relative position of the maxilla and mandible, the anterior crossbite of the anterior bony anterior teeth can be improved, and a good cranial , Jaw, surface lay the foundation