• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dental Press Journal of Orthodontics >Comparison of two asymmetric headgear force systems: A finite element analysis
【24h】

Comparison of two asymmetric headgear force systems: A finite element analysis

机译：两种不对称头盔动力系统的比较：有限元分析

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Objective: The aim of this study was to evaluate the effect of displacement patterns of the molar teeth in response to different asymmetric headgear loading using 3D finite element method. Methods: A series of twenty-five facebow with different left vs . right outer bow length and different expansion of left vs . right were designed. The non-favored side (right side) was shortened at intervals of 10 mm, and favored side (left side) was expanded 10 degree greater than right side and 5 degree expansion were successively added. At the first phase, each side received 200-g load, implying the neck strap to displace toward shorter arm. At the second phase, a total of 400-g load was applied to the ends of the outer bow. Because of the neck strap displacement, the shorter arm received greater load than the left side, the magnitude of the applied force to each side depended on difference of left vs . right outer bow length and expansion. Results: All systems were effective in promoting asymmetric distal movement of the molars. However, the asymmetrical facebow with the 40 mm shortening and 25 degree expansion outer bow when unequal force applied could be used in asymmetric mechanics. Medial and occlusal displacing forces were observed in all systems. Conclusions: Both equal and unequal force application is effective for molar distalization. Expansion of the outer bow in the affected side and shortening of the outer bow in the normal side were effective to produced differential distal molar movement.
机译：目的：本研究的目的是使用3D有限元方法评估臼齿对不同的不对称头饰载荷的响应对位移的影响。方法：一系列的二十五个脸弓，左手和左手不同。右外弓长度和左vs。正确的设计。以10mm的间隔缩短非有利面（右侧），并将有利面（左侧）扩展到比右侧大10度，并依次添加5度扩展。在第一阶段，每侧承受200 g的载荷，这意味着颈带会向较短的手臂移动。在第二阶段，将总共400克的载荷施加到外弓的两端。由于颈带移位，较短的手臂比左侧承受更大的负荷，施加到每一侧的力的大小取决于左侧与右侧的差异。右外弓长度和扩张。结果：所有系统均有效地促进了臼齿的不对称向远侧运动。但是，当施加不相等的力时，具有40 mm缩短长度和25度扩展外弓的不对称面弓可用于不对称力学中。在所有系统中均观察到了内侧和咬合移位力。结论：相等和不相等的力施加都对磨牙远侧有效。外弓在患侧的扩张和外弓在正常侧的缩短对产生不同的远侧磨牙运动有效。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号