541
This method can effectively imitate real bones by the randomization process , thus promoting the bone attachment and bone cell in-growth , as well as increasing the damage tolerance .
 concept or principle: process; machine or equipment: bone attachment; biomedical: bone cell; material: as; material: as; machanical property: damage tolerance
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:
 concept or principle: process; machine or equipment: bone attachment; biomedical: bone cell; material: as; material: as; machanical property: damage tolerance