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Related Concept Videos

Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

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When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
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Bone Remodeling01:40

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Impact Loading01:19

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Impact loading occurs when a moving object collides with a stationary structure, such as a rod with a uniform cross-sectional area fixed at one end. Under these conditions, the rod absorbs the kinetic energy from the striking object, leading to deformation and subsequent stress development. As the rod returns to its original position and reaches maximum stress, the absorbed energy, initially manifested as kinetic energy, transforms entirely into strain energy.
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Bone Formation by Intramembranous Ossification01:29

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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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General Case of Eccentric Axial Loading01:12

General Case of Eccentric Axial Loading

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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
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Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

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Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
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Related Experiment Video

Updated: Aug 27, 2025

A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle
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Dynamic loading stimulates mandibular condyle remodeling.

Cristina C Teixeira1, Fanar Abdullah2, Mona Alikhani2

  • 1Department of Orthodontics, New York University College of Dentistry, New York, New York.

Journal of the World Federation of Orthodontists
|September 24, 2022
PubMed
Summary
This summary is machine-generated.

Low-magnitude, high-frequency dynamic loading promotes chondrocyte maturation and endochondral bone formation. This finding suggests a potential treatment for condylar cartilage regeneration and enhancing mandibular growth.

Keywords:
Cell proliferationChondrogenic markersCondylar growthDynamic loadingEndochondral bone formationOsteogenic effect

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Area of Science:

  • Biomedical Engineering
  • Orthodontics
  • Regenerative Medicine

Background:

  • Low-magnitude, high-frequency dynamic loading is known to have an osteogenic effect on alveolar bone.
  • Chondrocytes and osteoblasts share common progenitor cells, suggesting dynamic loading might also stimulate chondrocytes.
  • Such stimulation could benefit patients with damaged condylar cartilage or mandibular deficiency.

Purpose of the Study:

  • To investigate the effect of low-magnitude, high-frequency dynamic loading on condylar cartilage in vivo.
  • To determine if dynamic loading influences chondrocyte proliferation, differentiation, and maturation.
  • To assess the impact on endochondral bone formation and mandibular growth.

Main Methods:

  • Growing Sprague-Dawley rats were divided into control, static load, and dynamic load groups.
  • The dynamic load group received 5 minutes/day of loading (0.3 g acceleration, 30 με peak strain).
  • Samples were analyzed using RT-PCR, microcomputed tomography, and histology at days 0, 28, and 56.

Main Results:

  • Dynamic loading significantly increased mesenchymal cell proliferation and differentiation into chondrocytes.
  • Chondrocyte maturation was promoted, leading to increased endochondral bone formation.
  • Condylar process lengthening was observed in the dynamic loading group.

Conclusions:

  • Low-magnitude, high-frequency dynamic loading positively affects condylar cartilage and endochondral bone formation.
  • This loading modality shows potential for regenerating condylar cartilage.
  • It may enhance the efficacy of orthopedic appliances for mandibular growth modification.