Distal movement of mandibular molars in adult patients with the skeletal anchorage system
Distal movement of mandibular molars in adult patients with the skeletal anchorage system
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DOI：
10.1016/j.ajodo.2003.02.003
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发表时间：
2004-02-01
影响因子：
3
通讯作者：
Mitani, H
中科院分区：
文献类型：
--
作者：
Sugawara, J;Daimaruya, T;Mitani, H
骨骼支抗系统 (SAS) 由钛锚板和单皮质螺钉组成，临时放置在上颌骨或下颌骨或两者中，作为绝对正畸支抗单元。磨牙的远移一直是传统正畸中最困难的生物力学问题之一，特别是在成人和下颌骨中。然而，现在可以使用 SAS 将磨牙向远端移动，以矫正前牙反咬合、上颌牙突出、拥挤和牙齿不对称，而无需拔除前磨牙。本研究评估了下颌磨牙远移期间和之后的治疗和治疗后变化。在 15 名成年患者（12 名女性和 3 名男性）中，共有 29 颗下颌磨牙通过 SAS 成功远中移动。通过头影测量X光片和牙模分析远端化和复发的量以及牙齿移动的类型。下颌第一磨牙的平均远移量在牙冠水平为3.5毫米，在牙根水平为1.8毫米。牙冠和根尖水平的平均复发量均为 0.3 毫米。 29 颗下颌磨牙中，9 颗向后倾斜，其余则根据既定治疗目标向远端平移。 SAS 是一种可行的移动下颌磨牙的方式，用于远端矫正前牙反牙合、以下颌前牙拥挤为特征的咬合不正以及牙齿不对称。
The skeletal anchorage system (SAS) consists of titanium anchor plates and monocortical screws that are temporarily placed in either the maxilla or the mandible, or in both, as absolute orthodontic anchorage units. Distalization of the molars has been one of the most difficult biomechanical problems in traditional orthodontics, particularly in adults and in the mandible. However, it has now become possible to move molars distally with the SAS to correct anterior crossbites, maxillary dental protrusion, crowding, and dental asymmetries without having to extract premolars. This study evaluated the treatment and posttreatment changes during and after distalization of the mandibular molars. In 15 adult patients (12 women and 3 men), a total of 29 mandibular molars were successfully distalized with SAS. The amount of distalization and relapse and the type of tooth movement were analyzed with cephalometric radiographs and dental casts. The average amount of distalization of the mandibular first molars was 3.5 mm at the crown level and 1.8 mm at the root level. The average amount of relapse was 0.3 mm at both the crown and root apex levels. Of 29 mandibular molars, 9 were tipped back, and the others were translated distally in accordance with the established treatment goals. SAS is a viable modality to move mandibular molars for distally correcting anterior crossbites, malocclusions characterized by mandibular anterior crowding, and dental asymmetries.