中国神经再生研究(英文版) ›› 2013, Vol. 8 ›› Issue (33): 3131-3138.doi: 10.3969/j.issn.1673-5374.2013.33.007

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

聚乳酸-羟基乙酸管移植修复坐骨神经的黏弹性

  

  • 收稿日期:2013-06-10 修回日期:2013-06-10 出版日期:2013-11-25 发布日期:2013-11-25

Viscoelasticity of repaired sciatic nerve by poly(lactic-co-glycolic acid) tubes

Chengdong Piao1, Peng Li2, Guangyao Liu3, Kun Yang4   

  • Received:2013-06-10 Revised:2013-06-10 Online:2013-11-25 Published:2013-11-25
  • Contact: Guangyao Liu, M.D., Professor, Department of Orthopedics, China-Japan Union Hospital of Jilin University, Chuangchun 130031, Jilin Province, China, lgy@jlu.edu.cn.
  • About author:Chengdong Piao, M.D., Associate professor.

摘要:

医用高分子合成材料聚乳酸-羟基乙酸具有良好的生物相容性、生物可降解性和可调控的降解速率,可作为神经修复材料,其用于周围神经损伤修复后的应力松弛、蠕变特性对修复效果有直接影响。实验取死后24h内的新鲜尸体坐骨神经标本10条,从其中间切断,形成10mm缺损,再分别以自体神经和聚乳酸-羟基乙酸管吻接修复。结果发现应力松弛和蠕变实验中聚乳酸-羟基乙酸管移植坐骨神经在7200s应力下降量和应变上升量大于以自体神经移植组。提示聚乳酸-羟基乙酸具有很好的黏弹性特性,符合用于坐骨神经损伤修复生物材料的生物力学要求。

关键词: 神经再生, 周围神经损伤, 坐骨神经损伤模型, 自体神经, 聚乳酸-羟基乙酸, 移植, 修复, 应力松弛, 蠕变, 生物材料

Abstract:

Medical-grade synthetic poly(lactic-co-glycolic acid) polymer can be used as a biomaterial for nerve repair because of its good biocompatibility, biodegradability and adjustable degradation rate. The stress relaxation and creep properties of peripheral nerve can be greatly improved by repair with poly(lactic-co-glycolic acid) tubes. Ten sciatic nerve specimens were harvested from fresh corpses within 24 hours of death, and were prepared into sciatic nerve injury models by creating a 10 mm defect in each specimen. Defects were repaired by anastomosis with nerve autografts and poly(lactic-co-glycolic acid) tubes. Stress relaxation and creep testing showed that at 7 200 seconds, the sciatic nerve anastomosed by poly(lactic-co-glycolic acid) tubes exhibited a greater decrease in stress and increase in strain than those anastomosed by nerve autografts. These findings suggest that poly(lactic-co-glycolic acid) exhibits good viscoelasticity to meet the biomechanical require-ments for a biomaterial used to repair sciatic nerve injury.

Key words: neural regeneration, peripheral nerve injury, sciatic nerve injury model, nerve autograft, poly(lactic-co-glycolic acid), transplantation, repair, stress relaxation, creep, biomaterial, neuroregeneration