Magnesium
Magnesium can be used as implant material. It has metallic strength and can be bioabsorbed (converted in magnesium oxide and hydrogen, degradation, corrosion). It can be used to stabilize bone fractures. Mechanical properties are similar those of natural bone.
more details:
1. Bioresorbable Magnesium Implants for Bone Applications by Olga Wetterlöv Charyeva