696
5.2 Surface modification Surface modification plays an important role in enhancing the biological performance of AM produced porous biomaterials , particularly bioactivity and biocompatibility .
 manufacturing process: Surface modification; concept or principle: Surface; concept or principle: biological performance of AM; machanical property: porous; material: biomaterials; machanical property: bioactivity; machanical property: biocompatibility
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:
 manufacturing process: Surface modification; concept or principle: Surface; concept or principle: biological performance of AM; machanical property: porous; material: biomaterials; machanical property: bioactivity; machanical property: biocompatibility