741
To further improve the mechanical and biological performance of these structures , both post-treatment and surface modification are necessary .
 application: mechanical; concept or principle: performance; manufacturing process: post-treatment; manufacturing process: surface modification
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:
 application: mechanical; concept or principle: performance; manufacturing process: post-treatment; manufacturing process: surface modification