Degradation and mechanical property of fixation devices of magnesium alloy
LIAO Sui-xiang
ZHENG Guan
SHI Cheng-long
YANG Xuan
XIAO Li-jun
XIA Hong
Abstract：Objective To investigate the degradation and mechanical property of fixation devices of magnesium alloy.Methods Twelve rabbits were divided into two groups, with 6 in each group.Ulnae fracture models were estab-lished in the experimental group, which then were fixed with ZK60 magnesium alloy.The control group served as healthy control without setting ulnae fracture models.After 16 weeks, ulnae fracture healing were tested by strength measurement, and corrosion rate of magnesium alloy was calculated through MicroCT.Results Three-point bending strength measure-ment showed that the mechanical loads between two groups were not statistically different (P>0.05).After 8 weeks, Mi-croCT showed that the corrosion rate of the screws was ( 0.40 ±0.04 ) mm/year, and the corrosion behavior of screw heads was faster than that of the screw shafts.The corrosion rate of bone plates was (0.55 ±0.02) mm/year.Conclusion The internal fixation of magnesium alloy is an ideal system for orthopaedics, which does not affect bone formation and fa-cilitates fracture healing.
Keywords：magnesium alloyfixation devicesinternal fixation of fracturebiomechanics
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 45-49 )