Comparison of maxillary canine retraction with sliding mechanics and a retraction spring: a three-dimensional analysis based on a midpalatal orthodontic implant
Comparison of maxillary canine retraction with sliding mechanics and a retraction spring: a three-dimensional analysis based on a midpalatal orthodontic implant
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DOI：
10.1093/ejo/26.6.585
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发表时间：
2004-12-01
影响因子：
2.6
通讯作者：
Mizoguchi, I
中科院分区：
文献类型：
--
作者：
Hayashi, K;Uechi, J;Mizoguchi, I
这项研究的目的是比较上颌尖牙后退与滑动机制和Ricketts尖牙后退弹簧，并以腭中正畸种植体为测量基准。检查了8例患者(男3例，女5例)。因为所有受试者都需要最大限度的后支抗，所以使用了整合了骨性的腭中种植体。为了检查牙齿移动，在每次预约时都会制作上颌牙弓的印记，并将其浇铸在模具石中。使用狭缝激光三维表面扫描系统对牙列模型进行测量，结果表明，基于腭中正畸种植体的牙齿移动的三维分析提供了关于尖牙后退的详细信息。结果还表明，尖牙回缩力在1N或更小时，不仅对滑动力学更有效，而且对回缩弹簧也更有效。然而，在旋转控制方面，滑动力学方法优于回缩弹簧。
The purpose of this study was to compare maxillary canine retraction with sliding mechanics and a Ricketts canine retraction spring, using a midpalatal orthodontic implant as a measuring reference. Eight patients (three males and five females) were examined. Because maximum posterior anchorage was required in all subjects, osseointegrated midpalatal implants were used. To examine tooth movement, impressions of the maxillary arch were made at each appointment and cast in die stone. A three-dimensional (3D) surface-scanning system using a slit laser beam was used to measure the series of dental casts.The results demonstrated that 3D analysis of tooth movement based on a midpalatal orthodontic implant provided detailed information on canine retraction. The results also suggested that a canine retracting force of 1 N or less was more effective not only for sliding mechanics but also for the retraction spring. However, the sliding mechanics approach was superior to the retraction spring with regard to rotational control.