在边缘上,由于粗的闭口接触,牙中出现了裂纹
1School of Mechanical Engineering, Tel-Aviv University, Tel-Aviv, Israel.
Journal of the mechanical behavior of biomedical materials
|November 9, 2023
概括
这项研究研究了使用球形接触的牙切片,发现切片尺寸和力大大独立于球半径,对于4毫米以下的洞穴负荷. 结果扩展到化石和假牙,用于饮食分析.
科学领域:
- 生物材料科学 生物材料科学
- 牙科机械 牙科机械
- 古人类学古人类学.
背景情况:
- 边缘破碎是人类牙的主要失败机制.
- 之前的研究主要使用了在抛光的骨尖端上的维克尔斯缩影.
- 这项研究扩展了先前的工作,通过使用球形接触来施加负荷.
研究的目的:
- 为了研究球形接触负荷对牙裂纹的影响.
- 在不同的球半径和加载位置下描述芯片尺寸和力.
- 建立一个分析化石牙和假牙的饮食特征的基础.
主要方法:
- 在牙的中央或抛光的尖端,使用球形 (0.45.16毫米半径) 施加闭口负荷.
- 使用比例来表征芯片尺寸:缩距离到牙冠直径 (h/Dm) 和芯片大小到牙冠直径 (D/Dm).
- 确定最小的裂变力 (Pch).
主要成果:
- 对于半径小于4毫米的负荷,h/Dm (0.300.36) 和D/Dm (0.510.69) 是独立于半径的,Pch ≈ 1330 N.
- 在4毫米半径以上,穴负荷导致质部门从牙核心脱离.
- 尖端负荷显示不同h/Dm (<0.3),D/Dm,和Pch与半径,故障由辐射裂或质解接启动.
结论:
- 球形接触负荷提供了一个比维克尔斯缩更现实的模拟闭塞力.
- 这些发现提供了有关了解饮食和牙磨损的切片机制的定量数据.
- 这种方法适用于分析化石人类,猿类和假牙.
更多相关视频
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
411
06:16Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues
Published on: April 26, 2024
740
相关概念视频
01:15Teeth
445
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...
445
01:21Tooth Anatomy
503
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...
503