生物机械行为和寿命的三根大第一个前与不同的访问腔设计:一个有限元素分析
Nehal Alshazly1, Nawar Naguib Nawar1, Gianluca Plotino2
1Department of Endodontics, Faculty of Dentistry, The British University in Egypt, Cairo, Egypt.
European endodontic journal
|May 31, 2023
概括
与传统设计相比,保守的接入腔设计对牙疲劳寿命的影响最小. 有限元分析 (FEA) 显示,保守性腔提供了对大第一个前的稍微更好的生物机械行为.
科学领域:
- 牙科生物力学 牙科生物力学
- 在牙科领域的有限元分析 (FEA)
- 牙周内治疗 牙周内治疗
背景情况:
- 进入腔的准备对于内牙治疗至关重要.
- 腔腔设计可以影响牙的生物力学完整性.
- 大第一个前呈现独特的解剖学挑战.
研究的目的:
- 在不同的接入腔设计下,评估三根大第一个前的生物力学行为.
- 为了比较使用FEA的完整,传统接入腔 (TAC) 和保守接入腔 (CAC) 模型的疲劳寿命和应力分布.
主要方法:
- 创建了三维有限元素分析 (FEA) 模型:完整的牙 (IT),TAC和CAC.
- 用特定的仪器尺寸和缩度模拟了根管道准备.
- 循环负荷 (50 N) 应用于闭塞表面,以确定循环到故障 (NCF),应力模式,最大·米塞斯 (VM) 和最大主应力 (MPS).
主要成果:
- 与IT模型相比,TAC和CAC设计都减少了牙疲劳寿命.
- TAC模型的疲劳寿命为94.82%,而CAC模型的疲劳寿命为95.80%.
- 在闭塞表面观察到最大的应力,在TAC和CAC模型之间存在差异;根性应力保持在最小.
结论:
- 接入腔边缘和功能负载点之间的关系显著影响内牙治疗牙的生物力学行为和疲劳寿命.
- 与传统设计相比,保守的接入腔设计可能会提供有利的生物力学特征.
- FEA 是一种有价值的工具,用于评估不同内牙接入准备的生物力学影响.
更多相关视频
相关概念视频
01:15Teeth
513
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...
513
01:21Tooth Anatomy
581
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...
581