关键词: 阻生, 替牙期, 支抗, CBCT

Abstract: Objective To evaluate anchorage methods applied to the patients for the treatment of maxillary impacted central incisors in the early mixed dentition. Methods A total of 11 patients with maxillary impacted permanent central incisors were selected. The patients presented a ClassⅠskeletal base with average vertical proportions, and no obvious asymmetries. CBCT taken before treatment was used to substantiate the diagnosis, the location, appearance, teeth roots and surrounding tissues. Maxillary impacted central incisors were treated with removed or fixed appliances according to different situations after surgical exposure and bonding of a precision attachment. Results Impacted maxillary permanent central incisors were successfully guided to their places in the arch on a non-extraction basis using upper removed or fixed appliances. ClassⅠincisor’s relationship with normal overjet and overbite was achieved. Conclusion It is worthy of saving the maxillary impacted central incisors for the children. They need early treatment to prevent future complications. CBCT is necessary to guarantee the result.

Key words: Impacted, mixed dentition, anchorage, CBCT