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Related Concept Videos

Spongy Bone01:09

Spongy Bone

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).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
Compact Bone01:27

Compact Bone

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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Micro-PIXE and SAXS studies at the bone-cartilage interface.

W Kaabar1, O Gundogdu, A Laklouk

  • 1Department of Physics, University of Surrey, Guildford, UK. w.kaabar@surrey.ac.uk

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|October 20, 2009
PubMed
Summary

This study used micro Proton Induced X-ray Emission (micro-PIXE) to map essential elements like calcium, phosphorus, and zinc in human osteoarthritis (OA) cartilage. Findings reveal elemental distribution changes linked to OA

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Area of Science:

  • Biomedical research
  • Materials science
  • Medical imaging

Background:

  • Osteoarthritis (OA) involves degenerative changes in articular cartilage and subchondral bone.
  • Essential cations (Ca, P, Zn) play roles in cartilage homeostasis and OA pathogenesis.
  • Metalloproteinases and alkaline phosphatase are implicated in OA processes and cartilage mineralization.

Purpose of the Study:

  • To quantify elemental distribution in human OA articular cartilage using micro-PIXE.
  • To investigate structural changes in collagen networks of decalcified OA cartilage via SAXS.

Main Methods:

  • Micro Proton Induced X-ray Emission (micro-PIXE) for elemental analysis.
  • Small-Angle X-ray Scattering (SAXS) on decalcified cartilage.
  • Utilized the cSAXS beamline at the Swiss Light Source.

Main Results:

  • Quantified distribution of essential elements (Ca, P, Zn) in diseased human articular cartilage.
  • Explored structural and organizational changes in collagen networks of OA cartilage.

Conclusions:

  • Elemental distribution analysis provides insights into OA pathophysiology.
  • SAXS reveals collagen network alterations in diseased cartilage, contributing to understanding OA structural changes.