首页> 外文学位 >Finite element analysis of miniscrew placement in maxillary alveolar bone with varied angulation and material type.
【24h】

Finite element analysis of miniscrew placement in maxillary alveolar bone with varied angulation and material type.

机译:不同角度和材料类型的上颌牙槽骨中微螺钉放置的有限元分析。

获取原文
获取原文并翻译 | 示例

摘要

Mechanical stress may be associated with orthodontic miniscrew loosening, contributing to failure. This study evaluated stresses from loads on miniscrews with varying angulation/material type combinations using Finite Element Analysis (FEA). Left posterior maxilla and TOMASRTM miniscrew models were constructed with buccal miniscrew insertion between UL5/6 at 45°, 60°, and 90° angulations. Titanium (Ti), stainless steel (SS) and composite (Comp) materials were used for miniscrews. After retraction load placement models were solved with ANSYS 10.0. Maximum principle (MaxPS), minimum principle (MinPS) and von Mises (vonMS) stresses were evaluated in cortical bone and miniscrew for all angulation/material combinations. Peak ultimate tensile strengths were 1/3 below bone and miniscrew MaxPS. MaxPS in bone was greatest at 45° and least at 60°. Comp miniscrew stress trends don't follow Ti and SS with varied angulation. Varied angulation likely doesn't contribute to miniscrew failure. Stress properties of SS miniscrews compare favorably with Ti miniscrews; however, Comp shows variance which could be clinically and biologically significant.
机译:机械应力可能与正畸微螺钉松动有关,从而导致失败。这项研究使用有限元分析(FEA)评估了具有不同角度/材料类型组合的微型螺钉上的载荷应力。左后上颌骨和TOMASRTM微型螺钉模型是在45°,60°和90°的角度下在UL5 / 6之间插入颊微型螺钉。微型螺钉使用钛(Ti),不锈钢(SS)和复合材料(Comp)。回缩后,用ANSYS 10.0解决了载荷放置模型。对于所有角度/材料组合,评估了皮质骨和微螺钉中的最大原理(MaxPS),最小原理(MinPS)和冯·米塞斯(vonMS)应力。峰值极限抗拉强度低于骨骼和微型螺钉MaxPS的1/3。骨骼中的MaxPS在45°处最大,在60°处最大。精密微螺钉的应力趋势不会随Ti和SS的变化而变化。角度变化可能不会导致微螺钉故障。 SS微型螺钉的应力特性优于Ti微型螺钉;但是,Comp显示方差可能具有临床和生物学意义。

著录项

  • 作者

    Pollei, Jason Karl.;

  • 作者单位

    The University of North Carolina at Chapel Hill.;

  • 授予单位 The University of North Carolina at Chapel Hill.;
  • 学科 Health Sciences Dentistry.
  • 学位 M.S.
  • 年度 2009
  • 页码 71 p.
  • 总页数 71
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 口腔科学;
  • 关键词

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