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目的:探析固定式下颌前移矫治器对Ⅱ类错畸形患者的治疗效果。方法:入选我院2011年4月至2012年4月32例行固定式下颌前移矫治器治疗的Ⅱ类错畸形患者做为观察组,同期不愿接受矫治器治疗的30例Ⅱ类错畸形患者做为对照组,疗程9个月,治疗1月后比较两组患者治疗前后的头颅定位侧位片,总结疗效。结果:两组患者治疗前上、下颌骨和上、下颌牙列各项指标均无显著差异(均P>0.05),治疗后,观察组上切缘点-腭平面距离(26.8±3.2)、SNB(75.6±3.8)、L1-MP(98.6±7.0)、PFH(44.2±3.0)、AFH(60.4±2.2)、下颌骨综合长度(67.5±5.3)和下磨牙点至下颌平面距离(28.7±2.3)显著高于治疗前(28.2±3.2)、(77.2±3.5)、(105.6±6.1)、(46.5±2.5)、(64.1±3.0)、(69.8±5.5)和(31.6±3.5),差异具有统计学意义(均P<0.05),对照组各项指标均无显著变化(均P>0.05)。结论:固定式下颌迁移矫治器对Ⅱ类错畸形患者下颌矫正疗效较好,需进一步观察长期稳定性。
Objective: To investigate the therapeutic effect of fixed mandibular advancement on patients with class Ⅱ malocclusion. Methods: From April 2011 to April 2012, 32 patients with class Ⅱ malocclusion treated with fixed mandibular advancement appliance were selected as the observation group and 30 patients with type Ⅱ malocclusion Cynomysia patients as a control group, the course of 9 months, 1 month after treatment compared the two groups of patients before and after treatment of the skull positioning lateral radiographs to summarize the effect. Results: Before and after treatment, there was no significant difference in the indexes of upper and lower jaw dentition (both P> 0.05). After treatment, the distance from the margin of cleft palate to palatal plane in observation group was (26.8 ± 3.2) SNB 75.6 ± 3.8, MP-44.2 ± 3.0, AFH 60.4 ± 2.2, total length of mandible 67.5 ± 5.3 and distance from lower mandibular point to mandibular plane 28.7 ± 2.3) was significantly higher than that before treatment (28.2 ± 3.2), (77.2 ± 3.5), (105.6 ± 6.1), (46.5 ± 2.5), (64.1 ± 3.0), (69.8 ± 5.5) and (31.6 ± 3.5) (All P <0.05). There was no significant change in all indexes of the control group (all P> 0.05). Conclusion: Fixed mandibular migration appliance has good effect on mandibular correction in patients with class Ⅱ malocclusion. Long-term stability should be further observed.