关键词: 上颌埋伏阻生中切牙, 开放式导萌, 封闭式导萌, 正畸牵引, 支抗

Abstract: Treatments for the maxillary impacted central incisors consist of many approaches, such as resistant reducing technique, surgical exposure combined with orthodontic traction, surgical extraction. Resistant reducing technique is just suitable for the maxillary impacted incisor with normal position and having the potential of growth, and usually it can receive a good result. Surgical exposure combined with orthodontic traction is the most popularly technique used in clinic. Surgical techniques include open eruption exposure and closed eruption exposure, and the latter is better. The most important thing in the orthodontic traction is the design of anchorage, position, direction and force of the traction. Surgical extraction and other techniques are mainly used for dilacerated impacted incisors, so they are seldom used in clinic.

Key words: maxillary impacted central incisor, open eruption exposure, closed eruption exposure, orthodontic traction, anchorage