Collagen Fiber Orientation
Collagen Fiber Orientation - Related Videos
12:09
Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations
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Cited by 14 •
2013
A methodology to estimate ventricular fiber orientations from in vivo images of patient heart geometries for personalized modeling is described. Validation of the methodology performed using normal and failing canine hearts demonstrate that that there are no significant differences between estimated and acquired fiber orientations at a clinically observable level.
06:07
Preparing Porcine Eyes for Confocal Reflectance Microscopy to Visualize the Vitreous Collagen Fiber Network
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2025
This method visualizes the native structure of collagen fibers in the vitreous body using confocal reflectance microscopy.
07:25
Collagen Hydrogels
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2023
Collagen is another widely used biomaterial that has found popularity in commercial applications, such as photography. Collagen has more recently been used in tissue engineering applications, by creating hydrogels that provide structure to engineered tissue. This video introduces collagen as a biomaterial, demonstrates how it is harvested from porcine skin, and shows how the material is used to create a hydrogel for tissue engineering applications. Finally, several applications of the material...
07:12
Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
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Cited by 3 •
2022
This protocol demonstrates the use of a microfluidic channel with changing geometry along the fluid flow direction to generate extensional strain (stretching) to align fibers in a 3D collagen hydrogel (<250 µm in thickness). The resulting alignment extends across several millimeters and is influenced by the extensional strain rate.
08:28
Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
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Cited by 6 •
2017
A protocol for the microfluidic spinning and microstructure characterization of regenerated silk fibroin monofilament is presented.
FAQs
Orientation changes mechanical behavior by making load response direction-dependent, rather than uniform in every direction. Parallel fibers can create a preferential path for transferring force, while crossed or random arrangements distribute structural relationships differently. In engineered tissues, reproducing the appropriate architecture therefore matters because scaffold or construct performance depends not only on collagen quantity, but also on how its organization matches expected loading.
Cellular traction, matrix remodeling, and external forces act as organizing influences during tissue formation. Cells can pull on the surrounding matrix, remodeling can rearrange existing collagen, and applied forces can reinforce directional structure. Together, these processes help explain why orientation is dynamic rather than fixed. Bioengineers use this relationship to design environments that encourage the organization needed for tissue maturation.
These architectures produce different mechanical and biological responses because they present different directional arrangements to cells and applied loads. Parallel organization emphasizes a common direction, crossed organization introduces intersecting directions, and random organization lacks a dominant alignment. Selecting among them allows an engineered construct to reflect the structural demands of a target tissue instead of imposing one universal pattern.
It influences cell alignment and maturation while supporting load transfer and functional integration. In scaffolds, hydrogels, and tissue constructs, controlled organization connects physical structure with biological development. This makes orientation a design variable: it can be adjusted to help cells and matrix develop a tissue-specific arrangement rather than simply adding collagen without directional control.
Mechanical conditioning, aligned substrates, and bioprinting provide distinct ways to guide collagen organization. Mechanical conditioning uses external forces, aligned substrates offer directional structural cues, and bioprinting can place construct material according to a planned arrangement. These approaches help bioengineers move from observing native organization to deliberately reproducing it in scaffolds, hydrogels, and tissue constructs.
Researchers characterize the existing organization in scaffolds, hydrogels, or tissue constructs and then select design strategies that reproduce the organization of native tissues. They may combine aligned substrates, mechanical conditioning, or bioprinting to establish a desired architecture. The resulting structure can be evaluated in relation to load transfer, cell alignment, maturation, and the intended functional integration of the construct.
Control of collagen organization is especially relevant to engineered replacements for tendon, ligament, and skin, as well as other connective tissues. The goal is to match the construct’s architecture to the tissue’s functional demands. Appropriate alignment can improve load transfer, encourage cell alignment and maturation, and support integration of the engineered replacement with its biological environment.