ObjectiveTo explore the predictive value of serum cystatin C （CysC） and trabecular bone score （TBS） for postoperative fracture recurrence in elderly patients with osteoporotic vertebral fractures. MethodsA total of 100 elderly patients with osteoporotic vertebral fractures who were treated surgically at Fuling Hospital Affiliated to Chongqing University from June 2022 to June 2023 were followed up for 2 years. They were divided into the poor group （31 cases） and the good group （69 cases） based on the postoperative fracture recurrence. Pearson analysis was used to analyze the correlation between serum CysC and TBS， Cox analysis was used to analyze the influencing factors of postoperative fracture recurrence in elderly patients with osteoporotic vertebral fractures， and ROC analysis was used to analyze the predictive value of serum CysC and TBS for postoperative fracture recurrence in patients. ResultsThe proportion of bone cement penetration and serum CysC in the poor group were significantly higher than those in the good group （χ² = 4.977， P = 0.026； t = 4.749， P = 0.000）， while the proportion of postoperative anti-osteoporosis treatment， bone mineral density T value， and TBS were significantly lower than those in the good group （χ² = 4.229， P = 0.040； t = 2.065， P = 0.042； t = 5.163， P = 0.000）. Serum CysC was negatively correlated with TBS （r = -0.318， P = 0.001）. Elevated serum CysC was a risk factor for postoperative fracture recurrence in elderly patients with osteoporotic vertebral fractures （P < 0.05）， while elevated TBS was a protective factor （P < 0.05）. The AUC of serum CysC for predicting postoperative fracture recurrence in patients was 0.786 （95%CI = 0.679-0.894）， with a sensitivity of 77.42% and a specificity of 71.01%. The AUC of TBS for predicting postoperative fracture recurrence in patients was 0.795 （95%CI = 0.698-0.892）， with a sensitivity of 74.19% and a specificity of 79.71%. The AUC of the combination of serum CysC and TBS for predicting postoperative fracture recurrence in patients was 0.858 （95%CI = 0.773-0.943）， with a sensitivity of 74.19% and a specificity of 82.61%. The combination of the two had a higher predictive value for postoperative fracture recurrence in patients. ConclusionsElderly patients with osteoporotic vertebral fractures who experience postoperative fracture recurrence have elevated serum CysC and decreased TBS. The combination of serum CysC and TBS has a certain predictive value for postoperative fracture recurrence in elderly patients with osteoporotic vertebral fractures.

Objective To investigate the effect of the percutaneous autologous bone marrow stem cell transplantation for the treatment of nonunion of tibial fracture. Methods From 2007 to 2011,the data of 11 patients with tibial nonunion who received autologous bone marrow stem cell transplantation was analyzed retrospectively. Taking bone marrow,examine,isolation,cultivation and expansion marrow mesenchymal stem cells( MSCs) ,and then marrow needle was inserted into the site of the nonunion under the X-ray,the MSCs were injected into the site of nonunion. Compression bandage was applied after operation. X-rays following-up were reviewed. Results All 11 patients were followed up from 4~27 months,with average of 13 months,X-ray showed:fracture healed well,no adverse events happen. Conclusion Satisfactory out-come can be obtained by percutaneous autologous bone marrow stem cell transplantation in treatment of tibial nonunion. Clinical application value is high,especially to patients who had suffered from severe skin and soft tissue injury with keloids healed.