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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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The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
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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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Related Experiment Video

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Bone Conditioned Medium: Preparation and Bioassay
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Extrafibrillarly Demineralized Dentin Matrix for Bone Regeneration.

Xiaoyi Wu1, Wenan Peng1, Gufeng Liu1

  • 1The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedical Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, 430072, China.

Advanced Healthcare Materials
|January 14, 2023
PubMed
Summary

A novel method using extrafibrillar demineralization creates dentin-derived biomaterials (EDM) for bone regeneration. This enhanced dentin matrix promotes cell growth and bone healing, offering new possibilities for tissue engineering.

Keywords:
bone regenerationdentinextrafibrillar demineralizationnanotopographytissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine
  • Biomineralization

Background:

  • Dentin, a natural extracellular matrix, is underutilized in bone grafting and tissue engineering.
  • Current limitations stem from inadequate treatment methods for dentin-derived materials.
  • There is a need for advanced biomaterials that mimic native bone structure and function.

Purpose of the Study:

  • To introduce extrafibrillar demineralization for creating dentin-derived biomaterials.
  • To evaluate the efficacy of the extrafibrillarly demineralized dentin matrix (EDM) in bone regeneration.
  • To investigate the underlying mechanisms of EDM's osteogenic potential.

Main Methods:

  • Selective removal of extrafibrillar apatite minerals using high-molecular-weight calcium chelating agents.
  • Preservation of intrafibrillar minerals within the dentin collagen matrix.
  • Characterization of EDM's nanotopography and mechanical properties.
  • In vitro assessment of cell adhesion, migration, and osteogenic differentiation.
  • In vivo evaluation of bone healing in rat calvarial defects.

Main Results:

  • EDM exhibits unique nanotopography and bone-like mechanical properties.
  • EDM significantly enhances cell adhesion, migration, and osteogenic differentiation in vitro.
  • EDM promotes enhanced bone healing in vivo in rat calvarial defect models.
  • The osteogenic effects are linked to the activation of the focal adhesion-cytoskeleton-nucleus mechanotransduction pathway.

Conclusions:

  • Extrafibrillar demineralization is a viable method for producing hierarchical collagen-based scaffolds from dentin.
  • EDM demonstrates significant potential for bone regeneration applications.
  • This facile top-down fabrication approach offers novel strategies for utilizing naturally derived bioactive materials in biomedical applications.