Alloying and coating are the most used methods to enhance Mg biological properties.
Ca, Zn, Mn and Zr are the most biocompatible Mg alloying elements.
The use of composite coatings (e.g. MAO and Ca-P ceramic) is of a great interest.
Mechanical and heat treatments are effectual processes to improve Mg alloys properties.
Further investigations of Mg alloys 3D-printing and more FEA studies are needed.