A Team of Researchers from China worked towards combining 3D printing with patient‐specific instrumentation (PSI) and performing a prospective randomized controlled trial (RCT) to show that 3DP‐designed PSI performed better than traditional TKA. CT scans were converted to 3D printing files, printed out on an UP BOX, using bio-safe polylactic acid. Eighty five patients got operated and received the LEGION Total Knee System. The outcomes on the follow up revealed PSI to have better postoperative radiological outcomes, accuracy in 3DP-designed PSI, and feasibility.