替牙早期上颌阻生中切牙矫治过程中的支抗控制

目的评价替牙早期上颌阻生中切牙矫治过程中的支抗控制及矫治要点。方法选择常州市口腔医院正畸科替牙早期上颌中切牙阻生需进行牵引治疗的骨性Ⅰ类患者11例,治疗前拍摄CBCT以确定上颌阻生中切牙的位置、外形、牙根及周围组织等情况,根据情况进行治疗,牙齿位置基本正常即主动加力结束即视为矫治结束,分析矫治过程中的支抗控制及矫治效果。结果替牙早期上颌阻生中切牙矫治过程中,正常萌出的上切牙和第一磨牙或第二乳磨牙基本可以提供所需的支抗;阻生严重者,先采用活动矫治器牵引阻生牙后再采用固定矫治器进行精细调整。结论替牙早期阻生中切牙的保留对面部美观至关重要,采用必要的支抗控制进行保存治疗可以取得良好的效果;采用CBCT对阻生中切牙进行精确分析也是取得良好矫治效果的必要保障。

Anchorage methods applied for the treatment of maxillary impacted central incisors in the early mixed dentition

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 pa-tients 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 attach-ment. 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 complica-tions. CBCT is necessary to guarantee the result.