中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (2): 202-208.doi: 10.3969/j.issn.2095-4344.2017.02.008

• 组织工程骨及软骨材料 tissue-engineered bone and cartilage materials • 上一篇    下一篇

凹凸棒石/羟基磷灰石/聚己内酯/胶原构建的骨修复材料

李振珺1,2,齐社宁1,赵红斌2,王  维1,2,李  根2,张晓敏2,宋学文2
  

  1. 1兰州大学基础医学院,甘肃省兰州市  730000;2解放军兰州军区兰州总医院骨科研究所,甘肃省兰州市  730050
  • 收稿日期:2016-10-27 出版日期:2017-01-18 发布日期:2017-02-27
  • 通讯作者: 齐社宁,博士,硕士生导师,教授,兰州大学基础医学院,甘肃省兰州市 730000
  • 作者简介:李振珺,女,1993年生,甘肃省兰州市人,汉族,兰州大学在读硕士,主要从事组织工程方面的研究。
  • 基金资助:

    甘肃省科技重大专项 (1203FKDA036)

Palygorskite/hydroxyapatite/polycaprolactone/collagen composite scaffold for bone repair

Li Zhen-jun1, 2, Qi She-ning1, Zhao Hong-bin2, Wang Wei1, 2, Li Gen2, Zhang Xiao-min2, Song Xue-wen2 
  

  1. 1School of Basic Medical Sciences of Lanzhou University, Lanzhou 730000, Gansu Province, China; 2Institute of Orthopaedics, Lanzhou General Hospital of Lanzhou Military Region of Chinese PLA, Lanzhou 730050, Gansu Province, China
  • Received:2016-10-27 Online:2017-01-18 Published:2017-02-27
  • Contact: Qi She-ning, M.D., Master’s supervisor, Professor, School of Basic Medical Sciences of Lanzhou University, Lanzhou 730000, Gansu Province, China
  • About author:Li Zhen-jun, Studying for master’s degree, School of Basic Medical Sciences of Lanzhou University, Lanzhou 730000, Gansu Province, China; Institute of Orthopaedics, Lanzhou General Hospital of Lanzhou Military Region of Chinese PLA, Lanzhou 730050, Gansu Province, China
  • Supported by:

    the Major Project of Gansu Provincial Science and Technology, No. 1203FKDA036

摘要:

文章快速阅读:

 

文题释义:
凹凸棒石
:又称坡缕石或坡缕缟石,是一种具链层状结构的含水富镁硅酸盐黏土矿物,在其结构中存在晶格置换,棒晶中含有不定量的Na+ 、Ca 2+ 、Fe 3+ 、Al 3+等,凹凸棒石具有独特的分散、耐高温、抗盐碱等良好的胶体性质和较高的吸附脱色能力,并具有一定的可塑性及黏结力,有较好的生物活性和相容性。
羟基磷灰石:理论组成成分为Ca10(PO4)6(OH)2,钙磷比约为1.67,是一种较好的功能材料,它与人体骨骼的无机质成分和结构基本一致,以无机盐的形式呈现。缺钙羟基磷灰石钙磷比约为1.50,与自然骨成分最为接近,并且具有更好生物相容性和活性,是很好的骨组织替代材料和载体。

背景:骨移植是修复骨缺损的惟一方法,但传统的骨移植方法均存在一定的弊端。骨组织工程可达到修复或重建骨的目的,为骨缺损患者的治疗带来新的选择。
目的:构建一种新型有效提高骨缺损修复的组织工程支架材料。
方法:采用化学沉淀辅以微波辐射法制备出不同Ca/P比(1.50/1.67)的羟基磷灰石,采用溶液灌注-溶剂挥发法、离子滤沥法等制备凹凸棒石/羟基磷灰石/聚己内酯/胶原、凹凸棒石/缺钙羟基磷灰石/聚己内酯/胶原、凹凸棒石/聚己内酯/胶原(对照组)复合材料。利用扫描电子显微镜、红外光谱仪、表面接触测定仪、万能力学机等,分别进行材料表征、有效成分、亲水性和力学性能评价,用动物实验评价材料与宿主的组织相容性。
结果与结论:①精确控制pH值范围能合成不同Ca/P比的羟基磷灰石;②与凹凸棒石/聚己内酯/胶原复合材料相比,构建的凹凸棒石/羟基磷灰石/聚己内酯/胶原和凹凸棒石/缺钙羟基磷灰石/聚己内酯/胶原复合材料的力学性能、透气性、亲水性明显增强(P < 0.05),孔隙率、吸水膨胀率明显降低(P < 0.05);③动物实验结果显示,支架材料与宿主无免疫炎性反应,具有良好的组织相容性;④结果提示,构建的凹凸棒石/羟基磷灰石(1.50,1.67)/聚己内酯/胶原复合支架材料有可能成为较为理想的骨组织修复替代支架材料。

关键词: 生物材料, 骨生物材料, 凹凸棒石, 缺钙羟基磷灰石, 胶原, 聚己内酯, 骨修复支架材料

Abstract:

BACKGROUND: Bone transplantation is the only method for the repair of bone defects. However, traditional bone transplantation has some disadvantages. Bone tissue engineering, as a new treatment strategy, can achieve the desire therapeutic outcomes.
OBJECTIVE: To fabricate a new tissue-engineered scaffold for improving bone repair effectively.
METHODS: Hydroxyapatites (HA) with different Ca/P (1.50/1.67) ratios were synthesized by chemical precipitation method and microwave radiation method. Composite scaffolds of palygorskite (APC)/HA/polycaprolactone (PCL)/ collagen (COL), APC/calcium deficiency HA (CDHA)/PCL/COL, and APC/PCL/COL (control group) were prepared by solution perfusion-solvent evaporation and ion leaching method. The material characterization, active ingredients, hydrophilic property, and mechanical properties were evaluated by scanning electron microscope, infrared spectrometer, surface contact measuring instrument and universal mechanics, respectively. The histocompatibility of the implant with the host was assessed through animal experiments.
RESULTS AND CONCLUSION: By precise control of pH range, HA with different Ca/P ratios could be synthesized. The mechanical properties, air permeability, hydrophilic property of the APC/HA/PCL/COL and APC/CDHA/PCL/COL composite materials were significantly increased compared with the APC/PCL/COL composite material (P < 0.05), while the porosity, water absorption expansion rate were significantly decreased (P < 0.05). Results from our animal experiments showed that no immune inflammatory reaction was observed suggesting that the composite materials hold good histocompatibility. To conclude, the APC/HA (1.50/1.67)/PCL/COL composite materials are promising bone substitutes in bone tissue repair.

Key words: Biocompatible Materials, Collagen, Hydroxyapatites, Tissue Engineering

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