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Significant efforts have been made to treat bone disorders through the development of composite scaffolds utilizing calcium phosphate ( CaP ) using additive manufacturing techniques .
 bone, composite, calcium phosphate, additive manufacturing
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:
 bone, composite, calcium phosphate, additive manufacturing