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Related Concept Videos

The Bone Matrix01:18

The Bone Matrix

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Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...
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Bone Structure01:55

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
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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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Bone as Supporting Connective Tissue01:23

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Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
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Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. This gives strength and flexibility to the tissue. The inorganic matrix consists of mineral salts— mostly calcium salts—...
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Studying variations in bone composition at nano-scale resolution: a preliminary report.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Orthopedics

Background:

  • Bone exhibits a complex hierarchical structure across micrometer to nanometer scales.
  • Understanding nanoscale bone composition is crucial for diagnosing and treating bone diseases.

Purpose of the Study:

  • To analyze non-human primate osteonal bone composition at the nanoscale using AFM-IR.
  • To validate AFM-IR parameters for bone analysis and compare them with conventional FTIR spectroscopy.

Main Methods:

  • Utilized a spectrometer coupled to an Atomic Force Microscope (AFM-IR) for high-resolution (50-100 nm) analysis.
  • Calculated key FTIR parameters including mineral content, crystallinity, collagen maturity, and acid phosphate content.

Main Results:

  • AFM-IR spectra were comparable to conventional FTIR spectroscopy.
  • A repeating pattern in IR parameters was observed, correlating with human bone's lamellar spacing.
  • Demonstrated the capability of AFM-IR to provide novel compositional information at the nanometer level.

Conclusions:

  • AFM-IR spectroscopy is a viable technique for high-resolution bone compositional analysis.
  • The study provides a foundation for further nanoscale investigations into bone variations.
  • AFM-IR offers potential for advancing our understanding of bone at the nanoscale.