摘要
目的:借助于MINITAB统计学软件,采用Plackett-Burman设计和响应面优化法对重组类人胶原蛋白II(RHLCII)仿生人工骨材料成型工艺进行优化研究。方法:首先利用Plackett-Burman设计筛选出对材料抗压强度和孔隙率影响显著的三个因素,即纳米羟基磷灰石(nHA)/RHLCⅡ、京尼平浓度和预冷温度。在此基础上用最陡爬坡试验逼近最大响应区域,找到后续试验的中心点。再利用Box-Behnken实验设计及响应面分析法进行回归分析,确定主要影响因素的最佳水平。结果:优化后的三种主要影响成分为nHA/RHLCⅡ=1.54、京尼平浓度0.9%和预冷温度-75℃。结论:方程拟合良好,优化后的材料机械强度和孔隙率分别为81.56MPa、94.5%,较优化前分别提高了1.11MPa和0.9%;MTT测定结果表明材料细胞毒性试验合格,符合骨组织工程支架材料的要求,重复性好,有望应用于商品化生产。
Plackett-Burman design and Response Surface Methodology（RSM） were used to optimize a molding technology of human-like collagenⅡ（RHLCⅡ biomimetic composite.Methods： It showed by Plackett-Burman Experimental Design that nHA/RHLC Ⅱ,the concentration of genipin and precooling temperature had significant effects on the strength and pore size of scaffold.Then the path of steepest ascent was carried out to approach the optimal region of those three factors.Box-Behnken design and RSM were employed to investigate the interactions of the variables, and to ascertain the optimal values of the factors, which finally led to the maximum mechanical properties of the material. Results： The optimal concentrations of the factors were： HA/ RHLC Ⅱ 1.54, Genipin 0.9% and precooling temperature -75℃. Conclusion： The results showed a good fitness with the model. Mechanical strength and porosity were 81.56MPa and 94.5%, which were 1. 1Mpa and 0. 9% higher than previous work respectively. The MTT results showed a good biocompatibility and high reproductivity of the RHLCⅡ scaffold. Therefore, it is thought to be an ideal material for bone tissue regeneration and commercilization,
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2009年第6期817-823,共7页
Journal of Materials Science and Engineering
基金
国家“863”计划资助项目(2006AA02Z246)(、2007AA03Z456A)
陕西省科学技术研究发展计划资助项目(2007K06-03)
西北大学校内基金资助项目(05NW48)
关键词
骨支架
重组类人胶原蛋白Ⅱ
仿生
成型工艺
响应面优化法
bone scaffold
human-like collagen II（RHLC II）
biomimetics composite scaffold
molding technology
response surface methodology（RSM）
作者简介
马晓轩（1977-），男，博士，研究方向：生物材料。
通讯作者：范代娣，教授。E-mail：faidaidi@nwu．edu．cn。
