Related Experiment Video
Updated: May 24, 2026
14:49
Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro
Published on: April 15, 2022
Ca-Mg-Zn bulk metallic glasses as bioresorbable metals
J D Cao1, N T Kirkland, K J Laws
1School of Materials Science and Engineering, University of New South Wales, NSW 2052, Australia. cao.jake@gmail.com
Acta Biomaterialia
|March 13, 2012
Summary
Researchers developed novel calcium-based bulk metallic glasses for orthopedic use. These biocompatible alloys exhibit moderate stiffness and thermoplastic formability, but show rapid corrosion rates in vitro.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Biocompatible Metals
Background:
- Bioresorbable metals are crucial for temporary orthopaedic implants.
- Calcium (Ca) based alloys offer potential biocompatibility and biodegradability.
- Developing Ca-based bulk metallic glasses (BMGs) requires careful compositional design.
Purpose of the Study:
- To synthesize and characterize novel Ca-based BMGs composed solely of biocompatible elements (Ca, Mg, Zn).
- To evaluate the mechanical, thermophysical, and biocorrosion properties of these new alloys for orthopaedic applications.
Main Methods:
- Synthesis of six unique Ca-Mg-Zn BMG compositions.
- Characterization using critical casting thickness, mechanical testing (Young's modulus), and thermophysical analysis (glass transition temperature).
- In vitro biocorrosion testing via polarization and mass loss measurements.
Main Results:
- Achieved critical casting thickness up to 4.5 mm.
- Young's modulus of approximately 40 GPa, indicating moderate stiffness.
- Glass transition temperatures between 119-129°C, enabling thermoplastic processing.
- Relatively rapid in vitro corrosion rates, with some compositional influence observed.
Conclusions:
- Novel Ca-based BMGs composed of biocompatible elements were successfully synthesized.
- The alloys possess properties suitable for thermoplastic forming and have moderate stiffness.
- Further research is needed to mitigate the rapid corrosion rates for effective orthopaedic applications.
