中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (8): 1390-1397.doi: 10.3969/j.issn.2095-4344.2013.08.011

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

三种比色法评价4种牙科金属材料对L-929细胞的毒性

陈耀忠1,刘根娣1,宋 萍2,高 峰2   

  1. 1 东南大学附属中大医院口腔科,江苏省南京市 210009
    2 东南大学医学院,江苏省南京市 210009
  • 收稿日期:2012-10-19 修回日期:2012-11-19 出版日期:2013-02-19 发布日期:2013-02-19
  • 通讯作者: 刘根娣,主任医师,东南大学附属中大医院口腔科,江苏省南京市 210009 lgdourhome@163.com
  • 作者简介:陈耀忠★,男,1972年生,安徽省巢湖市人,汉族,2004年江西医学院毕业,硕士,主治医师,主要从事口腔临床及基础研究。chenyz2003@126.com

Evaluating cytotoxicity of four different dental metal materials toward L-929 cells using three assay systems

Chen Yao-zhong1, Liu Gen-di1, Song Ping2, Gao Feng2   

  1. 1 Department of Stomatology, Zhongda Hospital, Medical College of Southeast University, Nanjing 210009, Jiangsu Province, China 2 Medical College, Southeast University, Nanjing 210009, Jiangsu Province, China
  • Received:2012-10-19 Revised:2012-11-19 Online:2013-02-19 Published:2013-02-19
  • Contact: Liu Gen-di, Chief physician, Department of Stomatology, Zhongda Hospital, Medical College of Southeast University, Nanjing 210009, Jiangsu Province, China lgdourhome@163.com
  • About author:Chen Yao-zhong★, Master, Attending physician, Department of Stomatology, Zhongda Hospital, Medical College of Southeast University, Nanjing 210009, Jiangsu Province, China chenyz2003@126.com

摘要:

背景:采用不同方法评价材料的细胞毒性可能会得出不同的实验结果。
目的:采用3种比色法评价镍铬合金、钴铬合金、3铬13及纯钛等牙科金属材料对小鼠成纤维细胞(L-929细胞)的细胞毒性。
方法:以镍铬合金、钴铬合金、3铬13及纯钛4种牙科金属材料的浸提液分别作用于体外培养的L-929细胞24,72 h。以体积分数10%小牛血清+高糖DMEM培养液培养的L-929细胞为阴性对照组,以0.7%丙烯酰胺+体积分数10%小牛血清+高糖DMEM培养液培养的L-929细胞为阳性对照组,分别采用MTT、CCK-8及结晶紫3种比色法检测上述材料的细胞毒性。
结果与结论:①4种材料浸提液中培养的细胞形态正常,胞内结构清晰,随着培养时间延长细胞大量增殖,与阴性对照组细胞形态无明显差异。阳性对照组细胞数量明显减少,形态完整性受破坏,形成大量细胞碎片。②培养24 h时,CCK-8比色法检测中钴铬合金组的细胞相对增殖率低于阴性对照组(P < 0.05),MTT及结晶紫比色法检测中钴铬合金组的细胞相对增殖率与阴性对照组比较差异无显著性意义(P > 0.05);培养72 h时,MTT比色法检测中4种牙科金属材料组细胞相对增殖率低于阴性对照组(P < 0.01),CCK-8及结晶紫比色法检测中4组的细胞相对增殖率与阴性对照组比较差异无显著性意义(P > 0.05),但材料细胞毒性均为0-1级。表明上述4种牙科金属材料细胞毒性均在临床应用的允许范围内,具有良好的生物安全性。

关键词: 生物材料, 组织工程口腔材料, 镍铬合金, 钴铬合金, 3铬13, 纯钛, 牙科金属材料, 细胞毒性, L-929细胞, MTT比色法, CCK-8比色法, 结晶紫比色法, 省级基金, 生物材料图片文章

Abstract:

BACKGROUND: Different methods to evaluate cytotoxicity of the same material may produce different results.
OBJECTIVE: To evaluate the cytotoxicity of nickel-chromium alloy, cobalt-chromium alloy, 3Cr13 stainless steel and pure titanium toward L-929 cells by using three assay systems.
METHODS: The L-929 cells were cultivated in vitro in the extracts of four different dental metal materials (nickel-chromium alloy, cobalt-chromium alloy, 3Cr13 stainless steel and pure titanium) at 24 hours and 72 hours, separately. The L-929 cells, cultured in high-glucose Dulbecco’s modified Eagle’s medium supplemented with 10% fetal calf serum, served as the negative control group. And cells, cultured in high-glucose Dulbecco’s modified Eagle’s medium supplemented with 10% fetal calf serum and 0.7% acrylamide, served as the positive control group. The detection methods for the cytotoxicity included MTT, cell counting kit-8 and crystal violet cell proliferation assay system.
RESULTS AND CONCLUSION: (1) Microscopy showed that the L-929 cells, cultivated in the extracts of four different dental materials, were normal and their intracellular structure was clear. They proliferated well with extension of incubation time. There were no significant differences between the test and negative control groups at all times. However, the number of cells in the positive control group significantly reduced as compared with the negative control group. The morphological integrity destroyed and a lot of cell debris formed. (2) After culture for 24 hours, the cell counting kit-8 assay revealed that the relative growth rate of the cobalt-chromium alloy group was significantly lower than that of the negative group (P < 0.05), while the MTT and crystal violet assay revealed that there were no significant differences in cell viability between the cobalt-chromium alloy and negative control group (P > 0.05). After culture for 72 hours, the MTT assay revealed that the relative growth rate of four dental metal materials groups was significantly lower than that of the negative group (P < 0.01), while the cell counting kit-8 and crystal violet assay revealed that there were no significant differences in cell viability between the four dental metal materials and negative control group (P > 0.05). The cytotoxicity of the tested dental metal materials was grade 0-1, which meets the safety standard. These indicate that these four dental metal materials have good biological safety.

Key words: biomaterials, tissue engineering oral materials, nickel-chromium alloy, cobalt-chromium alloy, 3Cr13, pure titanium, dental metal materials, cytotoxicity, L-929 cells, MTT colorimetric assay, cell counting kit-8 assay, crystal violet assay, provincial grants-supported paper, biomaterial photographs-containing paper

中图分类号: