摘要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。
Abstract: Objective to evaluate anchorage methods applied to the patients for the treatment of maxillary impacted central incisors in the early mixed dentition.
阻生尖牙邻近切牙的根吸收组和无根吸收组尖牙的牙囊大小有无差别。
The extent and location with the root resorption of neighboring incisors were observed in the sequential transaxial views;
较常见的是尖牙和上颌切牙的埋伏阻生（第三磨牙除外）。
Impacted tooth frequently appears in upper cuspid and upper central incisors(except of the third molar) .
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