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Examples include artificial joints and load-bearing implants produced by AM using biocompatible materials such as hydroxyapatite , Ti , Ta and Coalloys and customized prostheses such as intervertebral spacers .
 application: artificial joints; engineering feature: load-bearing; application: implants; manufacturing process: AM; material: biocompatible materials; material: as; material: Ti; material: Ta; material: as
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:
 application: artificial joints; engineering feature: load-bearing; application: implants; manufacturing process: AM; material: biocompatible materials; material: as; material: Ti; material: Ta; material: as