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One of the main challenges in the application of porous scaffolds to orthopaedic implants is the adaptation of their mechanical and biomedical properties to those of natural bones .
 engineering feature: porous scaffolds; application: orthopaedic implants; application: mechanical; application: biomedical
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:
 engineering feature: porous scaffolds; application: orthopaedic implants; application: mechanical; application: biomedical