Professor Zhao Dewei's team at Zhongshan Hospital Affiliated to Dalian University recently used a 3D-printed porous tantalum personalized midfoot prosthesis to complete lesion resection and foot bone reconstruction for a patient with a giant cell tumor of the tendon sheath in the left foot. The patient recovered well after surgery, with improved walking and daily activity capabilities, and long-term foot pain was relieved. The prosthesis in this case was customized based on the patient's imaging data, enabling matched reconstruction of severe damage to the lateral cuneiform and cuboid bones. In terms of the technical approach, the team used 3D reconstruction to define the extent of lesion damage and designed a personalized porous tantalum prosthesis accordingly, leveraging the good biocompatibility of tantalum metal and the 3D-printed porous structure to provide space for bone tissue ingrowth, combined with a reasonable fixation method to provide mechanical support. The plan also combined the tantalum prosthesis with a vascularized fibular periosteal flap, balancing local blood supply and bone healing conditions while seeking a balance between lesion resection and functional preservation. This case moves personalized additive manufacturing implants from standardized products toward a clinical pathway customized to defect morphology, placing more specific demands on the metal powder side: stable mass production of porous tantalum implants depends on powder batch consistency and printing process repeatability, while prosthesis customization requires a shorter response chain among powder supply, design, and printing. The deepening application of tantalum materials in the medical implant field also accumulates clinical evidence for process validation of refractory metal powders in additive manufacturing. Value for powder buyers: ① Focus on batch consistency and biocompatibility certification of medical-grade tantalum powder to match the stable printing needs of porous implants; ② Establish a small-batch, fast-response powder supply mechanism for short-cycle delivery of personalized prostheses; ③ Track the pace of clinical volume growth for porous tantalum implants and plan procurement and inventory strategies for refractory metal powders in advance.