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Bone Cells and Tissue01:30

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Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
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Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
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Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
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Author Spotlight: Insights into the Use of Apple-Derived Cellulose Scaffolds for Bone Tissue Engineering
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Author Spotlight: Insights into the Use of Apple-Derived Cellulose Scaffolds for Bone Tissue Engineering

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3D bioactive composite scaffolds for bone tissue engineering.

Gareth Turnbull1,2, Jon Clarke2, Frédéric Picard1,2

  • 1Department of Biomedical Engineering, Wolfson Building, University of Strathclyde, 106 Rottenrow, Glasgow, G4 0NW, United Kingdom.

Bioactive Materials
|May 11, 2018
PubMed
Summary
This summary is machine-generated.

Developing advanced composite 3D scaffolds is crucial for bone tissue engineering (BTE) due to limitations in current bone grafts. Combining materials like polymers, ceramics, and hydrogels enhances bone regeneration potential.

Keywords:
3D printing3D scaffoldBioactive compositesBioprintingBoneTissue engineering

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Area of Science:

  • Regenerative Medicine
  • Biomaterials Science
  • Tissue Engineering

Background:

  • Bone grafts are the second most transplanted tissue, with over 4 million annual operations for bone defects.
  • Rising demand for bone grafts stems from trauma, cancer, infection, and arthritis, highlighting limitations of current treatments.
  • Developing bioactive three-dimensional (3D) scaffolds is a key focus in bone tissue engineering (BTE) to address these limitations.

Purpose of the Study:

  • To review the ideal properties of bioactive composite 3D scaffolds for bone tissue engineering.
  • To examine the recent use of various materials (polymers, hydrogels, metals, ceramics, bio-glasses) in BTE.
  • To discuss scaffold fabrication, mechanical performance, biocompatibility, bioactivity, and clinical translation potential.

Main Methods:

  • Literature review focusing on composite 3D scaffolds in bone tissue engineering.
  • Analysis of material combinations (polymers, ceramics, hydrogels, metals, bio-glasses) for enhanced properties.
  • Discussion of fabrication techniques, including 3D printing, and their impact on scaffold characteristics.

Main Results:

  • Individual material classes (polymers, ceramics, hydrogels) show limitations when used alone for bone regeneration.
  • Composite 3D scaffolds combining different material groups offer improved mechanical properties and bioactivity.
  • Recent advancements utilize polymers, hydrogels, metals, ceramics, and bio-glasses in BTE scaffold development.

Conclusions:

  • Composite 3D scaffolds are essential for overcoming the limitations of traditional bone grafts and single-material scaffolds.
  • Careful selection of materials and fabrication methods is critical for optimizing scaffold performance in BTE.
  • Further research into scaffold fabrication, mechanical integrity, biocompatibility, and bioactivity will facilitate clinical translation.