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Histological and scanning electron microscopy analysis showed directional bony ingrowth into the scaffold interstices , tracking healing pathway origins to defect walls and marrow spaces .
 process characterization: scanning electron microscopy; concept or principle: directional bony ingrowth; biomedical: scaffold interstices; concept or principle: defect; concept or principle: marrow spaces
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:
 process characterization: scanning electron microscopy; concept or principle: directional bony ingrowth; biomedical: scaffold interstices; concept or principle: defect; concept or principle: marrow spaces