The most common dry bone discontinuity is tibial discontinuity, followed by femoral discontinuity, humeral discontinuity, ulnar radial discontinuity of the forearm, and clavicular discontinuity is less common. In this series of articles, I will explain the treatment of osteochondral nonunion through some cases. Case, humeral stem nonunion: Patient is a 52-year-old male with a postoperative right humeral fracture. This patient was a very complicated humeral osteonecrosis with three local surgeries and three occurrences of osteonecrosis. The first postoperative osteonecrosis the second postoperative osteonecrosis the third postoperative osteonecrosis Difficulty: three repeated surgeries with poor local soft tissue conditions; after three surgeries, the location of the radial nerve structures are not clear and easily damaged; three surgeries with simultaneous disuse osteoporosis, insufficient bone mass and poor local healing ability. Difficulty level: Grade III Surgical management: The surgical approach passed through the original surgical scar, separated and protected the radial nerve, removed the original failed internal fixation, clarified the dead bone and necrotic tissue at the severed end, found a large segment of bone defect with osteoporosis, used double plates for strong fixation and a large number of bone graft combined with structural bone graft. At the postoperative follow-up, the fracture healed well and the joint moved freely.