相关实验视频
Updated: Jan 26, 2026

08:23
Finite Element Modelling of a Cellular Electric Microenvironment
Published on: May 18, 2021
4.0K
确定联合直线定向角度的容忍范围:有限元素研究
Zheng Feng Li1, Guoqing Liao1, Deyang Wang1
1Southern Med Univ, Dept Joint Surg, Affiliated Hosp 3, Guangzhou, China.
Orthopaedics & traumatology, surgery & research : OTSR
|January 24, 2026
概括
个性化膝关节置换对齐是由安全的关节直线方向角 (JLOA) 范围为-3°至+4°指导的. 这种范围确保了全膝关节整形术 (TKA) 中聚乙烯内的生物机械稳定性.
科学领域:
- 生物力学 生物力学
- 整形外科手术 整形外科手术
- 计算建模计算建模
背景情况:
- 新兴的对齐技术,如动力对齐 (KA) 和功能对齐 (FA),需要更好的理论理解,以便在全膝关节整形术 (TKA) 中进行个性化关节线恢复.
- 目前在TKA中进行个性化关节线恢复的理论依据尚未得到充分发展,这凸显了对生物力学指导的需求.
研究的目的:
- 为了研究不同关节直线定向角度 (JLOAs) 在TKA期间对膝关节隔间负荷的生物力学影响.
- 为了在TKA中确定JLOA的生物力学耐受性范围.
- 为新型TKA对齐技术提供理论指导.
主要方法:
- 从三名膝关节骨关节炎 (KOA) 患者的CT数据开发出有限元模型,保持中立的部-膝关节-脚角 (HKA).
- 模拟的JLOA从-9° (valgus) 到+9° (varus) 进行模拟,并在双腿姿势,单腿姿势和坐时分析聚乙烯线的最大应力.
- 建立了使用统计分析和二次回归的压力趋势的数学模型.
主要成果:
- 在站立姿势下,聚乙烯层的最大应力在JLOA范围的-3°至+4°内保持稳定.
- 显著的压力增加发生在站立时超出-4° (valgus) 和+5° (varus),在坐时超出-3°到+6°.
- 二次回归显示了所有位置的U形应力曲线 (p < 0.05),双腿姿势显示出最高的应力增加比率 (46.01%) 超出了耐受范围.
结论:
- 聚乙烯内具有相对的生物力学稳定性,其JLOA范围为-3°至+4°.
- 推控制JLOA在-3°至+4°以内,用于个性化的TKA重建.
- 这项研究为先进的TKA对齐技术提供了生物力学理论指导.
相关概念视频
Angle of Twist - Elastic Range
781
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
781
Elements and Compounds
103.6K
Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond.
Elements
Elements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
Elements
Elements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
103.6K
Range
13.9K
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
13.9K
Periodic Classification of the Elements
58.8K
The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...
58.8K
Classification of Elements and Compounds
73.0K
Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond. Elements are classified as atomic or molecular based on the nature of their basic units.
Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
73.0K
Structural Joints: Synovial Joints
6.5K
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
6.5K

