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To investigate the effects of mesenchymal stem cells injections for treatment of post-traumatic osteonecrosis of the femoral head. A total of 46 patients were eligible and enrolled in the study. Twenty-three patients were treated with cell therapy and 23 patients with hip arthroplasty (control group). During a minimum follow-up duration of 10years, radiographs were used to evaluate the radiological results, and the Harris Hip Score (HHS) and visual analog scale were chosen to assess the clinical results. For the cell therapy group, the p