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目的:观察非拔牙矫治安氏Ⅱ类2分类错患者的疗效,总结矫治中的经验和不足,为临床正畸医生矫治此类错提供参考依据。方法:对20例采用非拔牙矫治的安氏Ⅱ类2分类错患者进行矫治前后的X线头影测量分析,比较骨性指标、牙性指标及软组织测量项目的变化情况。结果:20例患者经矫治后,垂直向骨性测量指标N-ANS、ANS-ME、MP/SN及MP/FH明显增加,牙性测量指标U1-NA、U1/NA、U1/SN、L1-NB、L1/NB及L1/MP显著增加,软组织测量指标UL-LL亦显著增加(P<0.05)。结论:非拔牙矫治可以很好地解除安氏Ⅱ类2分类错的前牙闭锁和颌骨的垂直向不调,对软组织侧貌也有一定改善。
OBJECTIVE: To observe the curative effect of non-extraction treatment on Class Ⅱ division 2 malocclusion patients and summarize the experience and deficiency in orthodontic treatment, so as to provide reference for clinical orthodontists to correct such misdiagnosis. Methods: Twenty patients with Class Ⅱ division 2 malocclusion who underwent non-extraction treatment were examined by X-ray before and after correction. The changes of skeletal index, dental index and soft tissue measurement items were compared. Results: After orthodontic treatment, the vertical skeletal parameters such as N-ANS, ANS-ME, MP / SN and MP / FH increased significantly -NB, L1 / NB and L1 / MP increased significantly, while UL-LL soft tissue measurement also increased significantly (P <0.05). Conclusion: Non-extraction treatment can relieve the vertical incarceration of anterior teeth occlusion and jawbone of Class Ⅱ division 2 malocclusion, and also improve soft tissue profile.