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The key characteristics to design porous metallic implants include the careful selection of porosity , pore size , and pore interconnectivity , aiming to achieve satisfactory clinical outcomes .
 engineering feature: design; material: metallic; application: implants; machanical property: porosity; process parameter: pore size; machanical property: pore
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; material: metallic; application: implants; machanical property: porosity; process parameter: pore size; machanical property: pore