Influence of biocompatible metal ions (Ag, Fe, Y) on the surface chemistry, corrosion behavior and cytocompatibility of Mg-1Ca alloy treated with MEVVA

- Surface morphology changes were observed after ion implantation by MEVVA.
- Y ion implantation revealed good biocompatibility.
- Existence of Mg/Ca-deficient Y2O3 layer led to protection after Y implantation.
- Two different mechanisms are illustrated and discussed.
- Give instruction for further study of ion implantation for biodegradable Mg alloys.