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目的:评价应用片段弓技术结合上颌微螺钉支抗配合III类颌间牵引非拔牙矫治单纯前牙拥挤的临床效果。方法:12例单纯前牙拥挤病例,应用片段弓技术,上颌颧下嵴微螺钉支抗配合III类牵引拉后牙段向远中,待间隙足够时排齐前牙,对矫治前后的模型及X线头颅侧位片进行测量分析。结果:U1/SN、U1/NA、L1/NB和IMPA均无明显变化,结论:后牙片段弓结合上颌微螺钉支抗可以在保持前牙唇倾度不变甚至轻度内收的情况下排齐拥挤的牙列。
OBJECTIVE: To evaluate the clinical effect of using segmental arch technique in combination with maxillary micro-screw support and type III intermaxillary traction in the treatment of simple anterior crowding. Methods: Twelve patients with simple anterior teeth crowding were treated with segmental arch technique. The maxillary zygomatic gyrus micro-screw anchorage was combined with the traction of type III traction teeth. The anterior teeth were aligned well when the gap was adequate. Cephalometrics were measured and analyzed. Results: There was no significant change in U1 / SN, U1 / NA, L1 / NB and IMPA. Conclusion: Posterior teeth segment arch combined with maxillary micro-screw support can maintain the anterior lip inclination unchanged or even adduct Align crowded dentition.