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In order to improve the mechanical properties of AM produced porous biomaterials so that they can mimic the human tissues and fulfil the desired functions , post-treatment is of critical importance .
 concept or principle: mechanical properties; manufacturing process: AM; machanical property: porous; material: biomaterials; machine or equipment: mimic; manufacturing process: post-treatment
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: mechanical properties; manufacturing process: AM; machanical property: porous; material: biomaterials; machine or equipment: mimic; manufacturing process: post-treatment