Computer‐aided Design and 3D‐printed Personalized Stem‐plate Composite for Precision Revision of the Proximal Humerus Endoprosthetic Replacement: A Technique Note

BACKGROUND: Aseptic loosening is considered to be a rather uncommon complication in proximal humerus endoprosthetic replacement (PHER). However, patients with aseptic loosening often suffer severe bone loss, which poses a great challenge in following revision. Under this situation, a standard stemmed endoprosthesis is unavailable for revision limb salvage. Computer‐aided design and 3D‐printed personalized implants are an emerging solution for reconstructing complex bone defects. CASE PRESENTATION: Here, we present a 67‐year‐old male who underwent PHER after tumor resection and developed aseptic loosening with severe periprosthetic osteolysis around the stem. Computer‐aided design and 3D‐printed personalized stem‐plate composite was used for the precision revision of this patient. During the follow‐up, encouraging results were observed, with good endoprosthetic stability and satisfactory limb function. CONCLUSION: Computer‐aid design and 3D‐printed personalized stem‐plate composite used in the present case could help to achieve good endoprosthetic stability and satisfactory limb function. This 3D‐printed personalized stem‐plate composite seems to be an effective method for the precise revision of PHER in patients with severe periprosthetic osteolysis. In addition, it also provides a novel method for similar revision surgery of other joints or primary endoprosthetic replacement with severe bone defects.