Related Experiment Video
Updated: May 14, 2026
08:43
Potentiodynamic Corrosion Testing
Published on: September 4, 2016
Biodegradable Metals and Corrosion Control: Challenges, Limits and New Opportunities for Innovating in Orthopedic
Abdelhakim Cherqaoui1, Carlo Paternoster1, Diego Mantovani1
1Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I, Department of Mineral, Metallurgical, and Materials Engineering, and University Hospital Research Center, Regenerative Medicine, University Laval, Québec, QC G1L 3L5, Canada.
Materials (Basel, Switzerland)
|May 13, 2026
Summary
Iron-manganese-carbon (Fe-Mn-C) biodegradable alloys offer promising temporary orthopedic fixation by balancing strength and degradation. Overcoming challenges in predicting in vivo performance and standardizing testing is key for clinical translation.
Area of Science:
- Orthopedic biomaterials science
- Materials engineering
- Biomedical engineering
Background:
- Permanent orthopedic implants cause stress shielding and require removal surgeries.
- Biodegradable metals like Mg, Zn, and Fe offer alternatives to traditional bioinert alloys.
- Fe-Mn-C alloys show potential for load-bearing applications due to strength, ductility, and MRI compatibility.
Purpose of the Study:
- To critically examine metallurgical design principles for Fe-Mn-C alloys.
- To review processing innovations and advanced strategies for enhanced osteointegration and modulated degradability.
- To assess the clinical viability of Fe-Mn-C alloys as next-generation orthopedic implants.
Main Methods:
- Analysis of metallurgical design principles: stacking fault energy, phase stability, and Mn electrochemical behavior.
- Review of processing innovations: additive manufacturing for porosity and microstructure control.
- Evaluation of advanced approaches: hybrid systems, surface functionalization, and graded architectures.
Main Results:
- Fe-Mn-C alloys exhibit tunable degradation and strength-ductility balance via twinning-induced plasticity.
- Additive manufacturing enables tailored porosity and accelerated degradation.
- Hybrid systems and graded architectures enhance osteointegration and control degradability.
Conclusions:
- Fe-Mn-C alloys present a promising avenue for biodegradable orthopedic fixation.
- Barriers to clinical translation include in vitro-in vivo degradation discrepancies and localized corrosion.
- Development of predictive models and standardized testing protocols are crucial for regulatory approval and clinical adoption.
