使用新鲜组织的旋转手腕复合体肌和囊层的弹性特性 - 一项生物力学研究
Jessica Y Cronje1, Nkhensani Mogale2, Shavana Govender3
1University of Pretoria, Pretoria, South Africa. jessicaycronje@gmail.com.
概括
旋转的肌层比囊层更为硬. 弹性模块的这种差异需要对这些不同的组织进行独立的手术修复,以保持生物力学平衡.
科学领域:
- 生物力学 生物力学
- 生物材料科学 生物材料科学
- 整形外科手术 整形外科手术
背景情况:
- 弹性模量量化组织度,对于理解生物材料特性至关重要.
- 数字图像相关性 (DIC) 提供了一种非常准确的方法来评估新鲜生物组织中的弹性特性.
研究的目的:
- 为了研究和比较旋转手臂复合体内囊和肌层的弹性.
- 使用数字图像相关性 (DIC) 进行精确的弹性性质测量.
主要方法:
- 在20x20毫米的囊和肌组织条纹上进行了拉伸测试,这些囊和肌组织来自上肌,下肌和下肌 (n=8).
- 数字图像相关性 (DIC) 用于测量测试期间的应变.
- 触角弹性模量值为每个组织层计算.
主要成果:
- 与囊层相比,肌层的平均触角弹性模块 (Supraspinatus: 62.1 MPa, Infraspinatus: 67.1 MPa, Subscapularis: 59.6 MPa) 显著高于囊层 (Supraspinatus: 29.0 MPa, Infraspinatus: 32.5 MPa, Subscapularis: 41.5 MPa).
结论:
- 轮肌和囊层之间的明显弹性模块突出了它们独特的生物机械作用.
- 建议对这些层进行独立的外科考虑,以防止在旋转手套修复过程中出现生物机械失衡.
相关概念视频
01:12Elastin is Responsible for Tissue Elasticity
2.3K
Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
2.3K
01:24Circular Shafts - Elastoplastic Materials
92
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
As torque on the...
92
01:12Gross Anatomy of Skeletal Muscles
11.6K
The connective tissues play a significant role in arranging the muscle fibers into a hierarchical structure that forms a complete muscle. Consider a muscle like the bicep brachii, commonly called the bicep. This muscle comprises thousands of muscle fibers enclosed by a protective layer of connective tissue called the endomysium. The endomysium is primarily composed of reticular fibers, a type of thin collagen fiber. It allows the exchange of nutrients and waste products at the fiber level,...
11.6K
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
242
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
242
01:13Dense Connective Tissue
7.3K
Dense connective tissue contains more collagen fibers than loose connective tissue. As a consequence, it displays greater resistance to stretching. There are two major categories of dense connective tissue— regular and irregular.
Dense Regular Connective Tissue
In dense regular connective tissue, fibers are arranged parallel to each other, enhancing its tensile strength and resistance to stretching in the direction of the fiber orientations. Ligaments and tendons are made of dense regular...
Dense Regular Connective Tissue
In dense regular connective tissue, fibers are arranged parallel to each other, enhancing its tensile strength and resistance to stretching in the direction of the fiber orientations. Ligaments and tendons are made of dense regular...
7.3K
01:31Muscles that Move the Arm
1.6K
Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
1.6K