Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (12): 1690-1696.doi: 10.3969/j.issn.2095-4344.2016.12.003

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Mechanism of absorbable bioglass injection for vertebral body supporting and osteogenic induction in osteoporosis

Long Hai-bin1, Hu Ying-ying2, Sun Gui-sen1   

  1. 1Department of Spinal Surgery, 2Department of Pathology, Central Hospital of Shengli Oil Field, Dongying 257034, Shandong Province, China
  • Received:2016-01-29 Online:2016-03-18 Published:2016-03-18
  • Contact: Hu Ying-ying, Attending physician, Department of Pathology, Central Hospital of Shengli Oil Field, Dongying 257034, Shandong Province, China
  • About author:Long Hai-bin, Master, Attending physician, Department of Spinal Surgery, Central Hospital of Shengli Oil Field, Dongying 257034, Shandong Province, China

Abstract:

BACKGROUND: Bioglass has good biocompatibility and biological activity, which can be combined with calcium phosphate bone cement to form an absorbable bioglass that has the advantages of both materials and is expected to have a better use of space.
OBJECTIVE: To explore the mechamism of the new type of absorbable bioglass injection for vertebral body supporting and osteogenic induction in osteoporosis rats.
METHODS: Twenty-seven female Sprague-Dawley rats were selected to make osteoporosis models by bilateral ovariectomy, and after 1 month, the rats were randomized into three groups. Bone defect models were established in the lumbar L4 segment of all the rats. Rats in the experimental group were subjected to absorbable bioglass injection; rats in the control group 1 underwent polymethylmethacrylate bone cement injection; and rats in the control group 2 were given injectable calcium phosphate. Twelve weeks after implantation, the compressive strength, degradation and osteogenesis of the implant materials were detected, and levels of serum bone morphogenetic protein-2 and transforming growth factor-β were measured.
RESULTS AND CONCLUSION: The compressive strength, hydroxyapatite deposition amount, and weight loss ratio in the experimental group were significantly higher than those in the two control groups (P < 0.05); the relative volume, thickness and number of bone trabeculae in the experimental group were significantly higher than those in the control groups (P < 0.05); the bone morphogenetic protein-2 and transforming growth factor-β protein levels in the experimental group were significantly higher than those in the two control groups (P < 0.05). These findings indicate that the new-type absorbable bioglass can greatly strengthen the vertebral body supporting and promote osteogenic effect in osteoporosis by enhancing the bone morphogenetic protein-2 and transforming growth factor-β protein levels.