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3D printing technology can also be used to produce novel titanium dental implants with a porous or rough surface and different types of restorations/components in metallic or polymeric materials .
 enabling technology: 3D printing technology; material: be; material: titanium; application: dental; machanical property: porous; concept or principle: surface; material: metallic; material: polymeric materials
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:
 enabling technology: 3D printing technology; material: be; material: titanium; application: dental; machanical property: porous; concept or principle: surface; material: metallic; material: polymeric materials