Related Experiment Video
Updated: Jun 26, 2026
12:19
Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
Published on: July 1, 2013
10.9K
Sheep Bone Ultrastructure Analyses Reveal Differences in Bone Maturation around Mg-Based and Ti Implants.
Kamila Iskhakova1, D C Florian Wieland1, Romy Marek2
1Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany.
Journal of Functional Biomaterials
|July 26, 2024
Summary
Magnesium alloy implants, like ZX00, show altered bone ultrastructure and reduced stiffness compared to titanium. Further research is needed to understand magnesium ion incorporation and bone remodeling effects.
Area of Science:
- Biomaterials Science
- Orthopedic Research
- Materials Science
Background:
- Magnesium alloys offer tunable degradation and bone-like mechanical properties for bone fracture treatment.
- ZX00 (Mg-0.45Zn-0.45Ca) exhibits suitable degradation and osseointegration, but its impact on bone ultrastructure is not fully understood.
- Bone's hierarchical structure, including ultrastructure, dictates local mechanical responses.
Purpose of the Study:
- To conduct the first comparative analysis of bone ultrastructure around ZX00 and titanium (Ti) implants.
- To investigate the effects of implant degradation on bone mineralization and mechanical properties.
- To elucidate the impact of magnesium (Mg) ion incorporation on bone healing and remodeling.
Main Methods:
- High-spatial-resolution analysis of bone ultrastructure around ZX00 and Ti implants at 6, 12, and 24 weeks.
- Investigation of bone mineralization using X-ray diffraction (XRD) to assess lattice spacing and crystallite size.
- Correlative indentation and strain mapping via scanning XRD to evaluate local mechanical properties.
Main Results:
- A significant decrease in (002) Bragg's peak lattice spacing near ZX00 implants compared to Ti, indicating altered mineralization.
- Reduced hydroxyapatite platelet thickness and osteon density observed closer to the ZX00 implant interface.
- Ti implants showed higher bone stiffness and faster mechanical adaptation than ZX00 implants.
Conclusions:
- Results suggest Mg2+ ion incorporation into the bone ultrastructure around ZX00 implants.
- Bone exhibits lower remodeling and stiffness in the presence of ZX00 implants compared to Ti implants.
- Understanding these ultrastructural changes is crucial for optimizing biodegradable magnesium alloy implants for bone regeneration.
Related Concept Videos
01:55Bone Structure
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.
01:40Bone Remodeling
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.
01:18The Bone Matrix
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 acid or...
01:09Spongy 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...
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...