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3D-printed PLA/Ti scaffolds with tailored porosity and pore size were fabricated via fused filament fabrication ( FFF ) .
 3D-printed, scaffolds, porosity, pore size, fabricated, fused filament fabrication, FFF
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 3D-printed, scaffolds, porosity, pore size, fabricated, fused filament fabrication, FFF