4830
Further , bone tissue grew into surface irregularities and in direct contact with the implant surfaces .
 biomedical: bone; concept or principle: surface; application: contact; application: implant
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: bone, surface, contact, implant 
Answer:
 biomedical: bone; concept or principle: surface; application: contact; application: implant