Bone Orientation
Bone Orientation - Related Videos
01:30
Oriented Surfaces
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2026
A surface is called orientable if a consistent choice of unit normal vector can be made at every point on the surface. A thin soap film stretched across a wire loop provides a familiar example. The film separates the air on one side from the air on the other, so one side can be selected as positive and the opposite side as negative. Once this choice is made, a unit normal vector can be assigned smoothly across the entire surface.At each point on the soap film, a unit normal vector points...
08:49
Models of Bone Metastasis
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Cited by 115 •
2012
Animal models are frequently utilized to study cancer metastasis to bone. In this protocol we will describe two common methods of tumor inoculation for bone metastasis studies and briefly describe some of the analyses utilized to monitor and quantify these models.
01:13
Location and Orientation of the Heart
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2024
The human heart, despite its modest size and weight, is an organ of remarkable strength and endurance. Roughly the size of a fist, the heart weighs between 250 and 350 grams and is nestled within the mediastinum, the medial cavity of the thorax. It extends obliquely for about 12 to 14 cm, resting on the superior surface of the diaphragm. The heart is positioned anterior to the vertebral column and posterior to the sternum, with two-thirds of its mass lying to the left of the midsternal line.
07:17
Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation
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Cited by 293 •
2016
Here we present a protocol for the dissection of hind limb long bones (femurs and tibiae) from the laboratory mouse. We further describe a rapid technique for bone marrow isolation from these bones that utilizes centrifugation for removal of bone marrow from the bone marrow space.
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.
FAQs
Bone orientation produces direction-dependent mechanics because organization is hierarchical. At the tissue scale, aligned collagen fibers and mineralized matrix contribute to directional stiffness and strength, while trabecular and cortical features extend that organization to larger structures. This multiscale arrangement helps explain why the same bone region can respond differently when loading direction changes.
Development and remodeling can modify bone orientation rather than leaving its organization fixed. Mechanical stimulation is another influence on this arrangement, linking physical loading with changes in structure. For bioengineers, these influences are important because a measured orientation represents a tissue state shaped by biological history and mechanical conditions, not merely a static geometric pattern.
Bone orientation supports structure-function analysis by linking aligned collagen fibers, mineralized matrix, and larger cortical or trabecular features with how bone bears and transfers loads. This relationship lets researchers examine whether organization at several scales corresponds to mechanical behavior, which is particularly useful when evaluating engineered or regenerating tissue.
Assessment can combine imaging, microscopy, and computational modeling, depending on the structural level and question being studied. Imaging and microscopy provide ways to examine orientation in bone tissue and its features, while computational models help relate that organization to mechanical behavior. Together, these approaches support structure-function analysis and bioengineering decisions.
In bioengineering, orientation measurements can guide the design of implants, scaffolds, and fixation strategies. The design goal is to better match native bone mechanics by accounting for directional stiffness and strength rather than treating organization as mechanically equivalent in every direction. This alignment between measured structure and device design supports more mechanically relevant engineering decisions.
For engineered or regenerating bone, researchers can compare structural organization with functional behavior. Orientation analysis helps determine whether aligned collagen, mineralized matrix, or larger-scale features resemble the organization needed for load bearing and transfer. The resulting structure-function evidence provides a way to evaluate constructs using both their organization and mechanical relevance.