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

被引：23

作者：

Rizvi, Syed Hasan Askari ^{[1
]}

Jiale-Che ^{[1
]}

Mehboob, Ali ^{[1
,2
]}

Zaheer, Usama ^{[1
]}

Chang, Seung-Hwan ^{[1
]}

机构：

[1] Chung Ang Univ, Sch Mech Engn, 221 Heukseok Dong, Seoul 156756, South Korea

[2] Univ Gujrat, Dept Mech Engn & Technol, Gujrat, Pakistan

来源：

COMPOSITE STRUCTURES | 2021年 / 272卷

基金：

新加坡国家研究基金会;

关键词：

Biodegradable composite; Bone plate; Degradation; Fatigue; Finite Element Analysis (FEA); BONE PLATES; FRACTURE; TIBIA; NAILS;

D O I：

10.1016/j.compstruct.2021.114267

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

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 nondegradable glass-polypropylene composite, which improves the healing performance of the fractured tibia.

引用

页数：10

共 37 条

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