What is the mechanical properties of bone?
Different bones in the body need to support different forces, so there is a large variation in strength between them….Tensile and Compressive Strength.
| Longitudinal direction | Transverse direction | |
|---|---|---|
| Tensile strength (MPa) | 60-70 | ~50 |
| Compressive strength (MPa) | 70-280 | ~50 |
What are the properties of bones?
They are lightweight yet strong and hard, and serve multiple functions. Bone tissue (osseous tissue), which is also called bone in the uncountable sense of that word, is hard tissue, a type of specialized connective tissue. It has a honeycomb-like matrix internally, which helps to give the bone rigidity.
What is Young’s modulus of bone?
The average trabecular Young’s modulus measured ultrasonically and mechanically was 14.8 GPa (S.D. 1.4) and 10.4 (S.D. 3.5) and the average Young’s modulus of microspecimens of cortical bone measured ultrasonically and mechanically was 20.7 GPa (S.D. 1.9) and 18.6 GPa (S.D.
What is mechanical loading bone?
Mechanical loading is a major regulator of bone mass and geometry. The osteocytes network is considered the main sensor of loads, through the shear stress generated by strain induced fluid flow in the lacuno-canalicular system.
Why are bones stronger in compression?
Both cortical bone and trabecular bone are stronger in compression than tension, which reflects the fact that the inorganic phase is stronger in compression than tension. The organic phase contributes to the ductility and toughness of the tissues.
What are the mechanical properties of cartilage?
| Mechanical property | Description | Value |
|---|---|---|
| Compressive Young’s modulus (MPa) | Equilibrium stiffness of cartilage unconstrained at the sides | 0.24–0.85 |
| Poisson’s ratio | Ratio of lateral strain to strain along the stress direction & a measure of the compressibility of pores in the ECM | 0.06–0.3 |
What is bone material?
Made mostly of collagen, bone is living, growing tissue. Collagen is a protein that provides a soft framework, and calcium phosphate is a mineral that adds strength and hardens the framework. This combination of collagen and calcium makes bone strong and flexible enough to withstand stress.
What is anisotropy of bone?
Degree of anisotropy (DA) is a measure of how highly oriented substructures are within a volume. Trabecular bone varies its orientation depending on mechanical load and can become anisotropic.
Is bone stronger than steel?
The hardest bone in the human body is the jawbone. The human skeleton renews once in every three months. The human body consists of over 600 muscles. Human bone is as strong as steel but 50 times lighter.
What is mechanical bone remodeling?
Bone remodeling is a lifelong process that gives rise to a mature, dynamic bone structure via a balance between bone formation by osteoblasts and resorption by osteoclasts. These opposite processes allow the accommodation of bones to dynamic mechanical forces, altering bone mass in response to changing conditions.
What is bone mechanical stress?
Mechanical stress affects bone cells possibly through the geometric changes within the microenvironment of bone to let the bone cells to perceive minor bending of substrate. This is induced by the signal through the attachment proteins on the matrix surface (Paszek et al. 2009).
What is the compressive strength of bone?
The compressive strength of bone is proportional to the square of the apparent density and to the strain rate raised to the 0.06 power. This relationship is applicable to trabecular and compact bone, and provides clinical guidelines for predicting bone strength on the basis of x-ray and densitometric examination.