1790
These new design capabilities allow organic shapes and freeform designs , which are often also termed biomimetic due to their organic shapes resembling natural structures and sometimes , in the case of medical devices in particular , the forms are shaped to fit natural materials such as bone implants .
 engineering feature: design; engineering feature: freeform designs; concept or principle: biomimetic; application: medical devices; concept or principle: fit; concept or principle: materials; material: as; application: implants
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:
 engineering feature: design; engineering feature: freeform designs; concept or principle: biomimetic; application: medical devices; concept or principle: fit; concept or principle: materials; material: as; application: implants