After 3 years follow-up, there was no recidivism and loosening of tooth but normal occluding relation.

随访3年无一例复发，牙齿无松动，咬合关系正常。

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Objective To investigate methods of treating anterior maxillary teeth protrusion by tooth extraction, and changes of the occluding relation and lateral appearances before and after the treatment.

目的探讨上颌牙齿前突拔牙矫治的方法及矫治前后的牙牙合关系与侧貌变化。

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