658
The degradable magnesium alloy bone screws were found clinically equivalent to the conventional Ti screws ; and no foreign body reaction , osteolysis , or systemic inflammatory reaction were observed for the Mg alloy screws .
 material: magnesium alloy; machine or equipment: bone screws; material: Ti; biomedical: osteolysis; material: Mg alloy
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:
 material: magnesium alloy; machine or equipment: bone screws; material: Ti; biomedical: osteolysis; material: Mg alloy