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相关概念视频

Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...

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上部中线校正使用月经-远端滑动器

Maria Elena De Felice1, Silvia Caruso1, Maximilian Kueffer2

  • 1Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, 67100 L'Aquila, Italy.

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|May 25, 2024
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概括
此摘要是机器生成的。

这种装置有效地纠正上部中线偏差,使得不对称的牙运动没有显著的定损失. 这种正义牙科工具有助于控制的 mesialization 和 distalization 改善牙对齐.

关键词:
牙 - 气泡膜不对称性模型叠加的叠加.骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage 骨架 anchorage临时安装装置的临时安装装置.上部中线偏差的偏差

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科学领域:

  • 矯正牙科 矯正牙科是一種矯正牙科.
  • 牙科生物力学 牙科生物力学

背景情况:

  • 上部中线偏差是一种常见的正统牙科问题.
  • 纠正通常需要精确控制牙的运动.
  • 不对称的力学可以具有挑战性,以有效地实施.

研究的目的:

  • 为了进行三维 (3D) 分析和切口的运动.
  • 评估Mesial-Distalslider装置在纠正上半线偏差方面的有效性.
  • 评估治疗期间牙移动的性质和程度.

主要方法:

  • 一项对20名用Mesial-Distalslider装置治疗的患者进行的回顾性研究.
  • 使用了涉及 mesialization 和 distalization 的不对称力学.
  • 治疗前和治疗后 (T0和T1) 牙成型的3D数字化分析.

主要成果:

  • 观察到显著的前后关节运动:4.5 ± 2.2 毫米 (介质化) 和-2.4 ± 1.7 毫米 (距离化).
  • 横向和垂直的关节运动是最小的,表明受控的机械.
  • 切口器的移位是有限的,在弥赛化侧的0.9mm±1.7mm,在脱化侧的0.6mm±0.7mm.

结论:

  • 梅西尔-迪斯塔尔斯莱德 (Mesial-Distalslider) 是一种有价值的设备,用于对中线上部偏差的正牙治疗.
  • 使用这种设备可以实现不对称的关节运动.
  • 在这次回顾性分析中没有观察到临床相关的固定损失.