中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (52): 7829-7835.doi: 10.3969/j.issn.2095-4344.2016.52.011

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

磷酸钙骨水泥/纤维蛋白胶复合材料填充桡骨缺损的生物相容性

黄  田1,郑南生2,张育专1,吴永乐1,王  刚1
  

  1. 1海南省第二人民医院,海南省五指山市  572299;2海南省中医院,海南省海口市  570203
  • 收稿日期:2016-09-23 出版日期:2016-12-16 发布日期:2016-12-16
  • 作者简介:黄田,男,1967年生,海南省保亭县人,黎族,副主任医师,主要从事骨科(创伤,关节)研究

Biocompatibility of calcium phosphate cement/fibrin glue in filling radius defects

Huang Tian1, Zheng Nan-sheng2, Zhang Yu-zhuan1, Wu Yong-le1, Wang Gang1
  

  1. 1Second People’s Hospital of Hainan Province, Wuzhishan 572299, Hainan Province, China; 2Hainan Provincial Hospital of Chinese Medicine, Haikou 570203, Hainan Province, China
  • Received:2016-09-23 Online:2016-12-16 Published:2016-12-16
  • About author:Huang Tian, Associate chief physician, Second People’s Hospital of Hainan Province, Wuzhishan 572299, Hainan Province, China

摘要:

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文题释义:
磷酸钙骨水泥:
是一种可降解生物材料,由一种或几种磷酸钙盐固体与液体混合而成。磷酸钙骨水泥材料具有许多的生物学优点,主要有生物降解性、骨引导活性、一定的抗压强度,是临床上较好的骨替代材料。但是,磷酸钙降解速度较慢,自身有一定脆性,显著限制了其在临床中的应用。
纤维蛋白凝胶:主要由天然细胞外基质成分构成,具有良好的生物相容性、有效的生物活性及生物可降解性,同时还具有三维多孔结构和良好的可塑性。研究发现纤维蛋白凝胶在体内的代谢过程可产生多种细胞因子,促进骨组织再生。

背景:磷酸钙骨水泥与人体自身骨矿物的化学组成和结构相似,能够填充因骨折造成的骨质塌陷,具有诱导成骨作用,但其降解速度较慢。
目的:评估磷酸钙骨水泥/纤维蛋白胶复合材料的生物相容性及修复桡骨缺损的可行性。
方法:①体外细胞毒性实验:分别以磷酸钙骨水泥/纤维蛋白胶材料浸提液、苯酚溶液,含体积分数为10%胎牛血清RPMI1640培养液培养小鼠成纤维细胞,检测细胞毒性分级;②血液相容性实验:在兔抗凝血中分别加入磷酸钙骨水泥/纤维蛋白胶材料浸提液、生理盐水及双蒸水,检测溶血率;③取45只新西兰大白兔,制备双侧桡骨缺损模型,随机分3组,空白对照组不进行任何干预,实验组与骨缺损处植入磷酸钙骨水泥/纤维蛋白胶复合材料,对照组植入自体桡骨。术后4,8,16周,进行X射线、组织学、骨密度及生物力学检测。
结果与结论:①细胞毒性:磷酸钙骨水泥/纤维蛋白胶材料浸提液的毒性为0至1级;②血液相容性:磷酸钙骨水泥/纤维蛋白胶材料的溶血率为3.15%;③体内修复实验:术后16周,X射线显示,实验组和对照组骨折线完全消失,髓腔复通,塑性完全;组织学显示,对照组骨小梁重建较明显,板层骨较成熟,髓腔再通,实验组有大量新生编织骨成网格状长入材料中,材料降解明显,降解与骨长入同步;实验组与对照组骨密度、最大负荷、最大应力和破坏能量均明显高于空白对照组(P < 0.05),实验组与对照组各指标比较差异无显著性意义;④结果表明:磷酸钙骨水泥/纤维蛋白胶复合材料具有良好的生物相容性,修复骨缺损可促进骨组织再生,获得与自体骨移植基本相当的治疗效果。

关键词: 生物材料, 骨生物材料, 桡骨缺损, 磷酸钙骨水泥/纤维蛋白胶, 生物相容性, 动物模型

Abstract:

BACKGROUND: The chemical compositions and structure of calcium phosphate bone cement are similar to those of human bone, which can fill the bone collapse caused by fracture and induce osteogenesis, but its degradation rate is slow.
OBJECTIVE: To evaluate the biocompatibility of the calcium phosphate cement/fibrin glue and the feasibility of repairing radius defects.
METHODS: In vitro cytotoxicity experiment: Mouse fibroblasts were cultured in the calcium phosphate bone cement/fibrin glue extracts, phenol solution, and RPMI 1640 culture medium containing 10% fetal bovine serum, respectively, to detect the cytotoxicity grade. Hemocompatibility experiment: Calcium phosphate bone cement/fibrin glue extracts, normal saline and distilled water were respectively added into the rabbit anticoagulation, to detect the hemolytic rate. Forty-five New Zealand white rabbits were enrolled and modeled into bilateral radius defects, followed by randomly allotted into three groups: blank control group without any intervention, experimental and control groups were given the implantation with calcium phosphate bone cement/fibrin glue and autologous radius, respectively. X-ray, histology, bone mineral density and biomechanical test were performed at postoperative 4, 8 and 16 weeks.
RESULTS AND CONCLUSION: The toxicity grade of the calcium phosphate cement/fibrin glue was 0 to 1. The hemolytic rate of the calcium phosphate cement/fibrin glue was 3.15%. At 16 weeks postoperatively, X-ray showed that in the experimental and control groups, the fracture line disappeared completely, pulp cavity was recanalized, and in plastic completely. Histology showed that the reconstructed bone trabecular was obvious, plate layer of bone was mature, and medullary cavity recanalization appeared in the control group; there were a large number of new grid-shaped woven bone tissues growing into the material in the experimental group, with overt degradation, and degradation rate was in parallel to bone ingrowth. The bone density, the maximum load, maximum stress and failure energy in the experimental and control groups were significantly higher than those in the blank control group (P < 0.05), and all above indicators showed no significant differences between the experimental and control groups. These results manifest that the calcium phosphate bone cement/fiber protein glue composite material holding a good biocompatibility can promote bone tissue regeneration for bone defect repair, achieving similar curative effect with autologous bone transplantation.

Key words: Calcium Phosphates, Fibrin Tissue Adhesive, Tissue Engineering

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