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BACKGROUND:Calcium sulfate bone substitute material has a good safety and biocompatibility, and possesses good strength after implantation to restore thoracolumbar mechanical strength and reduce vertebral height loss, and moreover, it may gradual y be degraded and absorbed. OBJECTIVE:To explore the influence of posterior pedicle screw fixation combined with calcium sulfate bone substitute material on the recovery of vertebral height after thoracolumbar vertebral compression fractures. METHODS:Forty-two patients with thoracolumbar vertebral compression fractures (T12-L3) were enrol ed to receive posterior pedicle screw fixation combined with calcium sulfate bone substitute, including 27 males and 15 females, aged 21-57 years. Al patients were fol owed-up for 12 months, and then anterior vertebral height, kyphosis Cobb angle, Oswestry disability index score and visual analog scale score before and after treatment were determined and compared. RESULTS AND CONCLUSION:At the end of fol ow-up, no local complications, no coagulation, no immune response and no screw breakage occurred;the anterior vertebral height, kyphosis Cobb angle, Oswestry disability index score and visual analog scale score were significantly improved (P<0.05). These findings indicate that the posterior pedicle screw fixation combined with calcium sulfate bone substitute can restore the vertebral height and promote functional recovery of patients with thoracolumbar vertebral compression fractures.
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Objective To observe the effect of tendon-bone healing after anterior cruciate ligament reconstruction through BFGF and PDGF.Methods Based of seventy two healthy matured New Zealand white rabbits underwent ACL reconstruction.Devide three groups through different methods,group BFGF,group PDGF,group normal.Results The maximum loads of group BFGF and PDGF after 2 and 5 weeks are higher than group normal,there was significant difference in maximum loads (P <0.05).The max stiffness of group BFGF and PDGF after 2 and 5 weeks are higher than group normal,there was significant difference in maximum loads(P <0.05).Conclusion The group BFGF and PDGF can promote tendon-bone healing by increasing the vascularization and blood vessels of the tendon-bone interface and vascular endothelial growth factor.In biomechanics,group BFGF and PDGF can pro-mote maximum loads、max stiffness and hardness of tendon-bone healing.