华西口腔医学杂志

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新型纳米羟基磷灰石根充糊剂的细胞毒性研究

李 平1,肖丽英2,李 伟2,谭 红1,廖运茂2,袁明龙3   

  1. 1.四川大学华西口腔医院 牙体牙髓病科;2.口腔生物医学工程教育部重点实验室; 3.四川琢新生物材料研究有限公司,四川 成都610041
  • 收稿日期:2005-10-25 修回日期:2005-10-25 出版日期:2005-10-20 发布日期:2005-10-20
  • 通讯作者: 肖丽英, Tel:028-81802617
  • 作者简介:李 平(1978-),女,上海人,住院医师,硕士,现在北京中日友好医院口腔科工作
  • 基金资助:
    教育部留学回国人员科研启动资金资助项目(0040305 402005)

Evaluation on Cytotoxicity of a New Nano-hydroxyapatite as Root Canal Filling Sealer

LIPing1,XIAOLi-ying2,LI Wei2,TANHong1,LIAO Yun-mao2,YUANMing-long3   

  1. 1.Dept.ofEndodontics,West China College ofStomatology,Sichuan Universi- ty,Chengdu610041,China; 2.Key.Laboratory of Oral Biomedical Engineering Ministry of Education,Sichuan University, Chengdu610041,China; 3.Zhuoxin Biomaterial CompanyLimited,Chengdu610041,China
  • Received:2005-10-25 Revised:2005-10-25 Online:2005-10-20 Published:2005-10-20

摘要: 目的 体外研究新型纳米羟基磷灰石(n-HA)根充糊剂的细胞毒性。方法 体外培养成骨细胞,采用碱性 磷酸酶(ALP)和Ⅰ型胶原免疫组化染色鉴定成骨细胞;采用MTT比色法,以F12培养基为对照,选用3种不同浓度 的新型n-HA根充糊剂浸提液,分别检测浸提液与成骨细胞接触1、3、5、7 d的细胞相对增殖率(RGR),以评价其细 胞毒性。结果 与对照组相比,新型n-HA根充糊剂表现出较高的细胞相对增殖率,随着浸提液浓度的降低和培养 时间的延长,细胞毒性趋于0级;相同时间点不同浓度的新型n-HA根充糊剂浸提液的吸光度值无显著性差异(P> 0·05)。结论 新型纳米羟基磷灰石根充材料无细胞毒性。

关键词: 纳米羟基磷灰石, 根管充填糊剂, 细胞毒性

Abstract:

Objective To evaluated the cytotoxicity of a newnano-hydroxyapatite (n-HA)root canal sealer.Methods In this study, the cytotoxicity was evaluated by the method of MTT assayin vitro, and culture medium F12 as control, three concentra- tions of the soaking material cultured with mouse osteoblast separately, to test the cell relative growth rate(RGR) of every group. Results The toxicity graduation of the n-HA root canal sealer tends to 0 with the culture time increasing. The cell survival rate of n-HA root canal sealer showed high relatively. The OD value of cell was similar for the negative control and the extracts(P> 0·05).Conclusion The result indicated that n-HA root canal sealer was compatible with the testcells.

Key words: nano-hydroxyapatite, root canal sealer, cytotoxicity