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Recent advancements in additive manufacturing ( AM ) have motivated researchers to consider this fabrication technique as a solution for challenges in patient-specific orthopaedic needs .
 additive manufacturing, AM, fabrication, as, solution, orthopaedic
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:
 additive manufacturing, AM, fabrication, as, solution, orthopaedic