对四个内部固定系统的生物力学评估,用于两段前宫切除和融合:有限元分析
Wei Yuan1, Lei Pei1, Han Wang1
1Department of Orthopedics, The First Hospital of China Medical University, Shenyang, China.
Frontiers in bioengineering and biotechnology
|November 13, 2025
概括
带有3D打印的人工脊椎体 (3D-AVB) 系统的四个前部跨脚螺丝 (ATPS) 系统为两段前部宫切除和融合 (ACCF) 提供了卓越的稳定性. 这种固定方法最大限度地减少了对植入物和相邻的脊柱段的压力.
科学领域:
- 脊柱外科手术 脊柱外科手术
- 生物机械工程 生物机械工程
- 整形外科的研究研究.
背景情况:
- 多段前宫切除和融合 (ACCF) 携带不稳定性和植入失败等风险.
- 传统的固定方法 (脊柱体螺丝,板,网状) 提供有限的三柱稳定性.
- 前跨脚螺丝 (ATPS) 和3D打印的人工脊椎体 (3D-AVB) 是有希望的,但需要直接的生物力学比较.
研究的目的:
- 为了比较四个不同的内部固定系统的生物力学性能,用于两段ACCF.
- 评估各种固定结构的稳定性,植入应力和相邻段效应.
主要方法:
- 使用C1-T1椎脊柱的经过验证的有限元素 (FE) 模型.
- 创建了四个两段ACCF模型 (C5-C6体型),具有不同的固定系统: (1) VBS/TP/TMC, (2) 斜VBS/3D-AVB, (3) VBS/ATPS/3D-AVB, (4) ATPS/3D-AVB.
- 应用轴负荷和矩来评估运动范围 (ROM),植入物应力和骨植入物接口应力.
主要成果:
- 所有系统都减少了手术段ROM;第四组 (ATPS / 3D-AVB) 实现了最大的减少 (约98%).
- 第4组显示出最低的植入物应力 (54.8 MPa) 和骨植入物界面应力.
- 与其他组不同的是,相邻的磁盘应力与4组完整模型相比,与其他组不同.
结论:
- 带有3D-AVB系统的四个ATPS为两段ACCF提供了卓越的稳定性和减少压力.
- 推的固定层次:第4组>第3组>第2组>第1组.
- 需要进一步的临床试验来确认长期疗效.
相关概念视频
Two-Dimensional Force System
A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
Three-Dimensional Force System
In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
Three-Dimensional Force System:Problem Solving
A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
System of Forces and Couples
In the analysis of structural systems, it is common to encounter members subjected to various forces and couple moments. Simplifying these systems can make the analysis more manageable and easier to understand. One approach to achieve this simplification is by moving a force to a point O that does not lie on its line of action and adding a couple with a moment equal to the moment of the force about point O.
The principle of transmissibility plays a crucial role in this process. According to...
The principle of transmissibility plays a crucial role in this process. According to...
Simplification of a Force and Couple System I
The concept of reducing a system of forces and couple moments to an equivalent system is essential in simplifying the analysis of rigid bodies. This reduction allows for more straightforward computation and understanding of the external effects produced by the system. In particular, systems with an equivalent resultant force and a resultant couple moment having perpendicular lines of action can be further reduced to a single equivalent resultant force acting along a new line of action. There...
Simplification of a Force and Couple System: II
In a three-dimensional system, multiple forces can act on an object. These forces can be combined into a single equivalent force, known as the resultant force. Similarly, the moments generated by these forces can be combined into a single equivalent moment, the resultant couple moment. In certain situations, these two entities may not be mutually perpendicular, meaning they do not have a 90-degree angle between them. This unique condition requires a deeper understanding of the interplay between...

