中国组织工程研究

• 生物材料基础实验 basic experiments of biomaterials • 上一篇    下一篇

模拟体液浸泡法评价柠檬酸钙的生物学特性

丁秀明1,彭  磊2, 3,文  峰1,谭昭伟4,牟忠林2, 4   

  1. 1海南大学,海南省海口市  570228;2海南省人民医院,海南省海口市  570311;3海南医学院附属医院创伤中心,海南省海口市  570206;4海南医学院,海南省海口市  571101
  • 收稿日期:2013-03-28 修回日期:2013-05-11 出版日期:2013-09-17 发布日期:2013-09-17
  • 通讯作者: 牟忠林,教授,主任医师,海南医学院,海南省海口市 571101;海南省人民医院,海南省海口市 570311
  • 作者简介:丁秀明★,女,1987年生,河北省唐山市人,汉族,海南大学材料与化工学院在读硕士,主要从事生物骨材料研究。 38011426@qq.com

Simulated body fluid immersion method for assessing biological characteristics of calcium citrate

Ding Xiu-ming1, Peng Lei2, 3, Wen Feng1, Tan Zhao-wei4, Mu Zhong-lin2, 4   

  1. 1University of Hainan, Haikou  570228, Hainan Province, China; 2the People’s Hospital of Hainan Province, Haikou  570311, Hainan Province, China; 3Trauma Center of the Affiliated Hospital of Hainan Medical University, Haikou  570206, Hainan Province, China; 4Hainan Medical University, Haikou  571101, Hainan Province, China
  • Received:2013-03-28 Revised:2013-05-11 Online:2013-09-17 Published:2013-09-17
  • Contact: Mu Zhong-lin, Professor, Chief physician, Hainan Medical University, Haikou 571101, Hainan Province, China; the People’s Hospital of Hainan Province, Haikou 570311, Hainan Province, Chinae
  • About author:Ding Xiu-ming★, Studying for master’s degree, University of Hainan, Haikou 570228, Hainan Province, China 38011426@qq.com

摘要:

背景:柠檬酸钙本身的溶解性能优于磷酸钙、硫酸钙等其他钙生物材料,并且合成的柠檬酸钙致密性良好,在降解过程中可高效平稳释放钙离子,所以更适合用于骨折缺损的填充,为骨折愈合初期提供所需要的钙离子。
目的:将天然生物矿化牡蛎壳和柠檬酸反应生成生物型柠檬酸钙生物材料,以期望在骨折愈合修复方面得到良好的应用。
方法:通过球磨机粉碎天然生物矿化的牡蛎壳,再经研磨制备成适合粒径的牡蛎壳粉,与柠檬酸反应得到生物型柠檬酸钙,再经研磨,过筛,得到适宜大小的柠檬酸钙颗粒。应用X射线和FT-IR光谱研究材料的结构和组分,扫描电子显微镜观察材料的表面形态,模拟体液实验评价其生物特性。
结果与结论:牡蛎壳粉末与饱和柠檬酸发生化学反应,转化生成了柠檬酸钙材料,并且晶体结构排列有序,形态紧密,晶体之间结合紧凑,具有一定的力学性能,这种结构也有利于延长材料的降解时间,平稳释放钙离子。柠檬酸钙在降解吸收过程中并未明显改变体液的pH值,整个pH值波动于7.20-7.46之间,对人体细胞的刺激性小。随着柠檬酸钙材料的逐渐降解,溶液中Ca2+浓度逐渐增大,且释放相对平缓,最终达到适宜成骨细胞增殖分化所需的胞外钙浓度,逐步稳定在7 mmol/L左右。表明以天然牡蛎壳为原料制备的柠檬酸钙具有优良的生物特性,作为人工骨材料具有天然的优越性。

关键词: 生物材料, 生物材料基础实验, 柠檬酸钙, 牡蛎壳, 性能评价, 生物特性, 模拟体液实验

Abstract:

BACKGROUND: Calcium citrate has a better solubility than calcium phosphate, calcium sulfate, and other calcium biomaterials. The synthetic calcium citrate has a good denseness, and stably releases calcium ions at a high efficiency during the degradation. Consequently, it may be more suitable for the filling of fracture defects, providing needed calcium ions for early fracture healing.
OBJECTIVE: To prepare calcium citrate biomaterials with a novel formulation based on the natural bio-mineralized oyster shells and citric acid so as to expect to get a good application in fracture healing repair.
METHODS: Crushing, grinding, and chemical reaction methods were used for refinement. Particle size analyzer, X-ray diffraction, scanning electron microscope, and Fourier transform infrared spectroscopy were adopted for analysis of the size distribution, composition, mineral phases, and micro-morphology. Biological characteristics were evaluated through a simulated body fluid experiment. 
RESULTS AND CONCLUSION: Oyster shell powder was reacted with saturated citric acid to produce the calcium citrate material that had uniform crystal structure and compact bonding among crystal bodies, and exhibited a certain mechanical ability. The calcium citrate material had a good crystal structure that was conductive to prolong the degradation time. The calcium citrate released calcium ions slowly, and did not produce dramatic changes in the pH value (7.20-7.46) of the surrounding in the dissolution process. With the gradual degradation of calcium citrate materials, Ca2+ concentration in solution increased gradually and stably, and ultimately achieved an appropriate concentration of   7 mmol/L, suitable for osteoblast proliferation and differentiation. Calcium citrate prepared using natural oyster shell has good biological properties, and exhibits a natural superiority to artificial bone materials.

Key words: calcium citrate, tissue engineering, biology, fractures

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