新型纳米根管充填材料对成骨细胞生长的影响

通过体外培养的成骨细胞,采用二甲基噻唑二苯基四唑溴盐比色法和流式细胞术对新型纳米根管充填材料(nHA-PA66)作用下的成骨细胞生长情况的变化进行研究,评价其对成骨细胞生长的影响。以该材料的细胞培养基浸提液作用于实验组细胞,对照组采用培养基本身。实验组和对照组成骨细胞的生长情况和细胞周期无显著性差异,表明该新型纳米材料对成骨细胞的生长和细胞周期无不良影响。提示新型纳米根管充填材料的成骨细胞相容性较好,具有用作根充材料的基础。

Influence of a New Nano-root Filling Material on the Proliferation of Osteoblast

This study sought to assess the effect of a new nano-root filling material, nano-hydroxyapatite polyamide66(nHA-PA66), on the growth of osteoblast cultured in vitro so as to evaluate its osteoblast-compatibility and potential to be used as root canal filling material. The Dulbecco's Modified Eagle Media (DMEM) leaching liquor of nHA-PA66 was applied to the osteoblasts of the test group while the DMEM itself was applied to control. The MTT assay and flow cytometry were used to evaluate the changes in cell growth and cell cycle. The relative proliferative ratio of different concentrations of nHA-PA66 ranged between 98%-106% without dose-dependent effect. The proportion and time of different subcycle of the two groups were close to each other. nHA-PA66 showed no negative effects on the osteoblasts' growth and cell cycle. These led to the suggestion that nHA-PA66 is not cytotoxic to osteoblast and is a promising material in clinical use.