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目的:研究成人安氏Ⅱ类1分类高角病例拔除4个第一前磨牙并分别应用微种植体支抗和传统支抗矫治后其平面和下颌平面的变化。方法:选取诊断为安氏Ⅱ类1分类高角并通过拔除4个第一前磨牙矫治后的患者40例,年龄18~30岁;微种植钉支抗组(G1)和传统支抗组(G2)各20例;收集两组患者矫治前后的头颅侧位片并对其进行测量分析。结果:G1组矫治前后相比:G1组矫治前后,U1-PP压低了(0.62±0.62)mm(P<0.05),SNA角减小了(0.93±1.09)°(P<0.05)。G2组矫治前后相比:U1-PP伸长(0.94±1.27)mm(P<0.05),U6-PP伸长了(1.41±1.00)mm(P<0.05),U6-SV近中移动了(2.56±1.46)mm(P<0.05),OP-SN角增加了(2.40±1.48)°(P<0.05),SNA角减小了(0.85±0.74)°(P<0.05),SNB角减小了(1.23±0.88)°(P<0.05),Y轴角增加了(1.20±1.36)°(P<0.05),下颌平面角(MP-SN、Go Gn-SN)分别增加了(1.18±1.03)°、(1.00±0.99)°(P<0.05)。其他测量项目治疗前后相比均无统计学差异(P>0.05)。结论:成人安氏Ⅱ类1分类高角通过拔除4个第一前磨牙进行治疗的患者利用微种植钉支抗关闭拔牙间隙时,对颌平面及下颌平面的控制与传统支抗相比具有明显的优势。
OBJECTIVE: To study the changes of mandibular plane and mandibular plane of four Angle 1 prehypertensives in adults with Class Ⅱ division 1 malocclusion and the application of micro-implant support and traditional brace therapy respectively. METHODS: Forty patients (aged 18-30 years) diagnosed as Class Ⅱ Division 1 high angle angiography and treated by extraction of the four first premolar teeth were selected. Microinjured nail anchoring group (G1) and traditional anchorage group (G2) ) In each of 20 cases; collected two groups of patients before and after treatment of cephalometric slices and its measurement analysis. Results: Before and after treatment in G1 group, U1-PP decreased (0.62 ± 0.62) mm (P <0.05) and SNA angle decreased (0.93 ± 1.09) ° (P <0.05) before and after treatment in G1 group. U6-PP elongation was (1.41 ± 1.00) mm (P <0.05), U6-SV was nearly (2.56 ± 1.46) mm (P <0.05), the OP-SN angle increased by 2.40 ± 1.48 ° (P <0.05) and the SNA angle decreased by 0.85 ± 0.74 ° (P <0.05) (1.23 ± 0.88) ° (P <0.05), Y axis angle increased (1.20 ± 1.36) ° (P <0.05) and mandibular planar angle (MP) increased by 1.18 ± 1.03 °, (1.00 ± 0.99) ° (P <0.05). There was no significant difference in other measurement items before and after treatment (P> 0.05). CONCLUSIONS: In adults with Class Ⅱ Division 1 high-angle treatment of patients who underwent removal of the four first premolar teeth, the control of the maxillary and mandibular planes was significantly Advantage.