在II型基底性阴道中对亚特兰托 - 尾不稳定性的生物力学研究:有限元分析
Junhua Ye1,2, Qinguo Huang3,4, Qiang Zhou1,4,5,6
1Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China.
Neurospine
|October 4, 2024
概括
大西洋尾关节 (AOJ) 形态显著影响脊结生物力学. 增加的AOJ发育不稳定导致更大的不稳定性和脊髓冲击风险,特别是在II型基底发育中.
科学领域:
- 生物力学 生物力学
- 整形外科手术 整形外科手术
- 头骨脊椎交叉口解剖学 头骨脊椎交叉口的解剖学
背景情况:
- 已发现三种亚特兰托-关节 (AOJ) 的形态类型.
- 这些AOJ类型与基础发育 (BI) 和atlanto-occipital不稳定性有关.
- 这些AOJ类型的精确生物力学后果以前尚不清楚.
研究的目的:
- 调查AOJ类型I,II和III之间的生物力学差异.
- 提供证据,将AOJ形态与II型BI的亚特兰托-尾部不稳定性联系起来.
主要方法:
- 创建了双边AOJ的生物机械模型,其中包括AOJ类型的不同组合 (I-I,I-II,II-II,II-III,III-III).
- 应用 1.5 Nm 扭矩来模拟宫运动.
- 分析了运动范围 (ROM),带和关节应力,以及基础牙间隔 (BDI).
主要成果:
- C0-1 ROM和旋转ROM在AOJ发育不良时逐渐增加,这表明III-III型模型中的超移动性和不稳定性.
- C1-2 ROM显示最小的变化.
- 观察到应力分布的破坏,曲时C0-1囊带应力降低,曲/旋转时应力增加.
- BDI下降,密度显示上部和后部位置增加,增加脊髓冲击风险.
结论:
- 大西洋尾关节的逐渐不合适会破坏支持性组织负荷,导致不稳定.
- 大西洋尾关节发育不良是一个关键的生物力学因素,在II型基底发育不良的发展.
更多相关视频
11:28A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
12.4K
07:30A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
Published on: September 21, 2017
8.9K
相关概念视频
Microtubule Instability
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated assembly and...
Load along a Single Axis
In structural engineering, the analysis of beams subjected to varying loads is a critical aspect of understanding the behavior and performance of these structural elements. A common scenario involves a beam subjected to a combination of different load distributions.
Consider a beam of length L subjected to a varying load, which is a combination of parabolic and trapezoidal load distribution along the x-axis. In this case, it is essential to determine the resultant loads, their locations, and...
Consider a beam of length L subjected to a varying load, which is a combination of parabolic and trapezoidal load distribution along the x-axis. In this case, it is essential to determine the resultant loads, their locations, and...
Conditions of Equilibrium
Equilibrium refers to a state where a rigid body is not subjected to any translational or rotational motion. This state is achieved when the force and couple acting on a rigid body equal zero. When the system of external forces results in a net effect equivalent to zero, the rigid body is considered to be in equilibrium.
Internal forces are not considered for conditions of equilibrium because they occur in equal and opposite pairs within the body, effectively canceling each other. As a result,...
Internal forces are not considered for conditions of equilibrium because they occur in equal and opposite pairs within the body, effectively canceling each other. As a result,...
Stability of Equilibrium Configuration: Problem Solving
The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
Problem-solving in the context of the stability of equilibrium configuration...
Problem-solving in the context of the stability of equilibrium configuration...
Indeterminate Structure
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium. Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and some...
Typical Model Studies
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
