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Consequently , the high elastic modulus ( similar to that of bone ) , thermoplasticity , and biocompatibility of poly ( lactic acid ) ( PLA ) make it well suited for the fabrication of such substitutes by fused filament fabrication ( FFF ) -based 3D printing .
 elastic modulus, bone, biocompatibility, PLA, fabrication, fused filament fabrication, FFF, 3D printing
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:
 elastic modulus, bone, biocompatibility, PLA, fabrication, fused filament fabrication, FFF, 3D printing