相关实验视频
Updated: Jan 12, 2026
07:17
Studying Orthodontic Tooth Movement in Mice
Published on: August 2, 2024
1.4K
牙在正运动下有外部顶端根再吸收:关于应力和位移的in silico分析
Alessandra Rodrigues Fonseca Tavares1, Marco Aurelio de Carvalho1, Priscilla Cardoso Lazari-Carvalho2
1Evangelical University of Goias, Anapolis, Brazil.
概括
在正牙治疗过程中,可以发生外部顶端根再吸收. 这项研究发现,转换力对牙造成最大的压力,而现有的牙根再吸收会影响牙周组织.
科学领域:
- 生物材料和生物力学
- 矯正牙科 矯正牙科是一種矯正牙科.
- 牙科成像 牙科成像 牙科成像
背景情况:
- 外部角根再吸收 (EARR) 是正牙治疗的一个常见并发症.
- 现有的EARR需要在开始 ортодонтической治疗之前仔细评估患者.
- 了解正力对有EARR的牙的生物力学影响至关重要.
研究的目的:
- 评估顶端根再吸收和各种正牙力量对应力和位移的影响.
- 使用三维 (3D) 有限元素分析 (FEA) 方法进行全面的生物力学评估.
- 在不同的正牙运动下,比较牙的压力和位移模式,有和没有顶端再吸收.
主要方法:
- 开发了两个上部中央切口的3D FEA模型:一个是原始的,一个是3毫米的顶部吸收.
- 模拟了四种正牙力应用:侵入,挤出,倾斜和翻译 (0.6 N).
- 使用专门的FEA软件 (Ansys) 分析了压力 (von Mises) 和位移.
主要成果:
- 转移运动产生了最高的·米塞斯应力值,不管根状况如何.
- 牙上角再吸收的牙在皮质骨和牙周带中表现出增加的应力度.
- 在牙和牙周结构的最大位移方面没有观察到显著差异.
结论:
- 牙周再吸收显著影响牙周组织的应力分布,但不会影响最大位移.
- 翻译性正牙力量在牙和周围的牙周组织中产生最高的应激水平.
- FEA提供了有价值的见解,用于管理先前存在根再吸收的患者的正牙治疗.
相关概念视频
01:21Tooth Anatomy
2.0K
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
2.0K
01:15Teeth
1.6K
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
1.6K