Experimental study on magnesium wire–polylactic acid biodegradable composite implants under in vitro material degradation and fatigue loading conditions

Rizvi, S.H.A.; Jiale-Che,.; Mehboob, A.; Zaheer, U.; Chang, S.-H.

doi:10.1016/j.compstruct.2021.114267

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Experimental study on magnesium wire–polylactic acid biodegradable composite implants under in vitro material degradation and fatigue loading conditions

Rizvi, S.H.A.;
Jiale-Che,.;
Mehboob, A.;
Zaheer, U.;
Chang, S.-H.

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32

초록

This study investigated the fatigue life of biodegradable magnesium wire–polylactic acid (Mg/PLA) composite implants during the initial patient rehabilitation period under physiological loads through experimental and finite element methods. Under a simulated body fluid condition, the fatigue life was observed to be completely affected by material degradation, which accelerated the pitting corrosion of the composite bone plate. The mechanical behaviour of Mg/PLA composite bone plate was investigated under physiological loading conditions for the case of a tibial fracture with a 3 mm gap. A three-point bending fatigue test setup was employed to validate the fatigue characteristics of composite specimens. Finally, to alleviate the generated stress and enhance the fatigue resistance of fully biodegradable composites, a hybrid composite bone plate is proposed. At the screw section, the hybrid composite is partly composed of a comparatively more fatigue-safe non-degradable glass–polypropylene composite, which improves the healing performance of the fractured tibia. © 2021 Elsevier Ltd

키워드

Biodegradable composite; Bone plate; Degradation; Fatigue; Finite Element Analysis (FEA); Biomarkers; Body fluids; Bone; Degradation; Fatigue testing; Finite element method; Fracture; Magnesium; Metal implants; Patient rehabilitation; Pitting; Polyesters; Polypropylenes; Biodegradable composites; Bone plate; Composite bone plates; Fatigue loadings; Finite element analyse; Hybrid composites; In-vitro; Loading condition; Material fatigue; Materials degradation; Fatigue of materials

제목: Experimental study on magnesium wire–polylactic acid biodegradable composite implants under in vitro material degradation and fatigue loading conditions

저자: Rizvi, S.H.A.; Jiale-Che,.; Mehboob, A.; Zaheer, U.; Chang, S.-H.

DOI: 10.1016/j.compstruct.2021.114267

발행일: 2021-09-15

유형: Article

저널명: Composite Structures

권: 272