PEER-REVIEWED PUBLICATION

2023

Open‑porous Magnesium‑Based Scaffolds Withstand In Vitro Corrosion Under Cyclic Loading: A Mechanistic Study

Bonithon R, Lupton C, et al.

Bioactive Materials

University of Portsmouth, Charité – Universitätsmedizin Berlin, Biotrics Bioimplants AG

RESEARCH SUMMARY
This study investigates how cyclic mechanical loading influences the corrosion behavior, structural evolution, and mechanical integrity of open-porous fluoride-coated magnesium scaffolds designed for bone regeneration. By combining dynamic immersion in simulated physiological media with cyclic compressive loading, the authors demonstrate that although cyclic loading accelerates corrosion, the scaffold maintains mechanical integrity through structural densification driven by corrosion product accumulation. The results show that these magnesium scaffolds retain load-bearing capacity under physiologically relevant cyclic compression, supporting their potential use as temporary biodegradable bone substitutes during early healing phases.

CELLSCALE INSTRUMENT USED

MechanoCulture TR

A CellScale MechanoCulture TR system was used to apply controlled in situ cyclic compressive loading to magnesium scaffolds during dynamic corrosion testing. Scaffolds were fully immersed in Hank’s Balanced Salt Solution, maintained at 37 °C, and subjected to cyclic compression up to 30 N at 1 Hz for up to 150,000 loading cycles, simulating postoperative mechanical conditions. The CellScale platform enabled simultaneous mechanical stimulation and environmental control, allowing assessment of how fatigue-type compressive loading influences scaffold degradation and mechanical performance.
AUTHORS

Roxane Bonithon; Colin Lupton; Marta Roldo; Joseph Nicholas Dunlop; Gordon William Blunn; Frank Witte; Gianluca Tozzi.

PUBLICATION DETAILS
JOURNAL

Bioactive Materials

YEAR

2023

INSTITUTIONS

University of Portsmouth, Charité – Universitätsmedizin Berlin, Biotrics Bioimplants AG

COUNTRIES

Germany, United Kingdom

INSTRUMENT USED

MechanoCulture TR

TESTING METHODS

Compression TestingFatigue TestingHydrated and Temperature Controlled Testing

RESEARCH APPLICATIONS

Bone Tissue Engineering & MechanicsMaterial Fatigue and DurabilityMusculoskeletal Tissue Engineering & MechanicsScaffold Mechanical Testing

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