A novel fixing method for Mg-based specimens used in the in-vitro immersion test

Abstract

PurposeThe aim of this paper is to predict the in-vivo degradation behaviour of Mg-based implants through in-vitro immersion test.Design/methodology/approachA novel placement mode arming to mimic the in-vivo situation was investigated in this work. Specimens were mounted on bones and then immersed in dynamic Hank’s solution.FindingsThe degradation behaviour of the specimen’s two sides is unequal. The bottom side which clings to the bone was isolated from solution in the early stage. During the late immersion period, there was crevice corrosion appearing on the bottom side. Weight loss and mechanical properties of specimens were also affected by the placement mode.Research limitations/implicationsPlacement mode reported here have guiding significance for degradation behaviour of bio-implants in the clinical study.Social implicationsPlacement mode reported here have guiding significance for degradation behaviour of bio-implants in the clinical study.Originality/valueA novel placement mode arming to mimic the in-vivo situation was investigated in this work, which was better fit the actual in vivo immersion situation.