The aim of this study was to investigate the cytotoxicity of modified nonequilibrium plasma with chlorhexidine digluconate（CHX） on human gingival fibroblasts（HGFs）, and to evaluate the biosecurity of modified none...The aim of this study was to investigate the cytotoxicity of modified nonequilibrium plasma with chlorhexidine digluconate（CHX） on human gingival fibroblasts（HGFs）, and to evaluate the biosecurity of modified nonequilibrium plasma with 2% CHX as a new method of root canal treatment. Tissue samples taken from human gingiva were primarily cultured and passaged. Cells from passages 3–7 were used. HGFs were treated by modified nonequilibrium plasma with 2% CHX for 0 min（control group）, 30 s, 1 min, 1.5 min, 3 min, 5 min, and 10 min, respectively, and then they were incubated for 0, 24, and 48 h. After that, cell counting kit-8（CCK-8） assay was applied to analyze the cytotoxicity of modified nonequilibrium plasma with 2% CHX on HGFs. There was no significant difference between the 0 h group treated with the modified nonequilibrium plasma for 1 min and the control group（P〉0.05）. However, there were significant differences between all the other treated groups and the control group（P〈0.05）. When treated for 1.5 min or shorter, the cell viability was obviously increased; while treated for 3 min or longer, it was obviously reduced. Moreover, when successively cultured for 0, 24, and 48 h, cell viability was decreased at first and then increased in the 3-min-treated and 5-min-treated groups. The modified nonequilibrium plasma with 2% CHX was of no influence on cell viability in 1.5 min treatment, and it could be safely used on root canal treatment.展开更多
In vitro cytotoxicity of six contemporary commercial dental filling restoratives on human dental primary cells, pulp cells (HPCs) and human gingival fibroblasts (HGFs), were tested using WST-1 assay. Continuous 3T3 mo...In vitro cytotoxicity of six contemporary commercial dental filling restoratives on human dental primary cells, pulp cells (HPCs) and human gingival fibroblasts (HGFs), were tested using WST-1 assay. Continuous 3T3 mouse fibroblast cell lines were used for comparison. The results show that conventional glass-ionomer cement (GIC) Fuji II is not cytotoxic to all the cells. Resin-modified GIC (RMGIC) Fuji II LC is not cytotoxic to both HPCs and HGFs but cytotoxic to 3T3 cells. RMGIC Vitremer and resin composite Z100 are very cytotoxic to all the cells. Resin composite P60 is cytotoxic but much less cytotoxic than Z100. Polycarboxylate cement Durelon is the most cytotoxic among the six tested materials. It was found that continuous 3T3 cell lines were more vulnerable to leachable cytotoxic components than primary HPCs and HGFs. It was also found that the cytotoxcity of the tested materials was dose-dependent.展开更多
目的：探讨中药骨碎补对体外培养的人的牙髓、牙龈、牙周膜成纤维细胞增殖的影响。方法采用组织块法外培养人牙髓、牙龈、牙周膜成纤维细胞，取第4、5代培养细胞随机分为实验组和对照组，实验组加不同浓度的骨碎补，对照组只加培养液。...目的：探讨中药骨碎补对体外培养的人的牙髓、牙龈、牙周膜成纤维细胞增殖的影响。方法采用组织块法外培养人牙髓、牙龈、牙周膜成纤维细胞，取第4、5代培养细胞随机分为实验组和对照组，实验组加不同浓度的骨碎补，对照组只加培养液。通过HE染色观察其对牙髓、牙龈、牙周膜成纤维细胞的形态、结构及生长增殖的影响，通过MTT法和考马斯亮蓝法对实验组和对照组的细胞生长情况和总蛋白合成的检测。结果①在10-1000μg/ml浓度范围内骨碎补对人牙髓、牙龈、牙周膜成纤维细胞均有促增殖作用（ P ＜0.05），尤以100μg/ml浓度最为明显（ P ＜0.01）；②总蛋白测定结果显示在骨碎补浓度为10μg/ml时，对照组与其总蛋白含量差异无统计学意义（ P ＞0.05），实验组细胞总蛋白含量随骨碎补浓度增加高于对照组（ P ＜0.05），尤以500μg/ml骨碎补浓度组作用牙髓成纤维细胞最佳；而100μg/ml骨碎补浓度组作用牙龈、牙周膜成纤维细胞最显著。结论骨碎补在有效作用浓度范围内，其促增殖效应和总蛋白含量与骨碎补浓度呈剂量依赖关系，随着浓度的增加促增殖作用增强、总蛋白含量增加，浓度达到最大作用后，随着浓度增加作用反而呈现减弱趋势。展开更多
基金supported by grants from the National Natural Science Foundation of China(No.81271189)the Hubei Provincial Science and Technology Support Program of China(No.2015BCE058)
文摘The aim of this study was to investigate the cytotoxicity of modified nonequilibrium plasma with chlorhexidine digluconate（CHX） on human gingival fibroblasts（HGFs）, and to evaluate the biosecurity of modified nonequilibrium plasma with 2% CHX as a new method of root canal treatment. Tissue samples taken from human gingiva were primarily cultured and passaged. Cells from passages 3–7 were used. HGFs were treated by modified nonequilibrium plasma with 2% CHX for 0 min（control group）, 30 s, 1 min, 1.5 min, 3 min, 5 min, and 10 min, respectively, and then they were incubated for 0, 24, and 48 h. After that, cell counting kit-8（CCK-8） assay was applied to analyze the cytotoxicity of modified nonequilibrium plasma with 2% CHX on HGFs. There was no significant difference between the 0 h group treated with the modified nonequilibrium plasma for 1 min and the control group（P〉0.05）. However, there were significant differences between all the other treated groups and the control group（P〈0.05）. When treated for 1.5 min or shorter, the cell viability was obviously increased; while treated for 3 min or longer, it was obviously reduced. Moreover, when successively cultured for 0, 24, and 48 h, cell viability was decreased at first and then increased in the 3-min-treated and 5-min-treated groups. The modified nonequilibrium plasma with 2% CHX was of no influence on cell viability in 1.5 min treatment, and it could be safely used on root canal treatment.
文摘In vitro cytotoxicity of six contemporary commercial dental filling restoratives on human dental primary cells, pulp cells (HPCs) and human gingival fibroblasts (HGFs), were tested using WST-1 assay. Continuous 3T3 mouse fibroblast cell lines were used for comparison. The results show that conventional glass-ionomer cement (GIC) Fuji II is not cytotoxic to all the cells. Resin-modified GIC (RMGIC) Fuji II LC is not cytotoxic to both HPCs and HGFs but cytotoxic to 3T3 cells. RMGIC Vitremer and resin composite Z100 are very cytotoxic to all the cells. Resin composite P60 is cytotoxic but much less cytotoxic than Z100. Polycarboxylate cement Durelon is the most cytotoxic among the six tested materials. It was found that continuous 3T3 cell lines were more vulnerable to leachable cytotoxic components than primary HPCs and HGFs. It was also found that the cytotoxcity of the tested materials was dose-dependent.
文摘目的：探讨中药骨碎补对体外培养的人的牙髓、牙龈、牙周膜成纤维细胞增殖的影响。方法采用组织块法外培养人牙髓、牙龈、牙周膜成纤维细胞，取第4、5代培养细胞随机分为实验组和对照组，实验组加不同浓度的骨碎补，对照组只加培养液。通过HE染色观察其对牙髓、牙龈、牙周膜成纤维细胞的形态、结构及生长增殖的影响，通过MTT法和考马斯亮蓝法对实验组和对照组的细胞生长情况和总蛋白合成的检测。结果①在10-1000μg/ml浓度范围内骨碎补对人牙髓、牙龈、牙周膜成纤维细胞均有促增殖作用（ P ＜0.05），尤以100μg/ml浓度最为明显（ P ＜0.01）；②总蛋白测定结果显示在骨碎补浓度为10μg/ml时，对照组与其总蛋白含量差异无统计学意义（ P ＞0.05），实验组细胞总蛋白含量随骨碎补浓度增加高于对照组（ P ＜0.05），尤以500μg/ml骨碎补浓度组作用牙髓成纤维细胞最佳；而100μg/ml骨碎补浓度组作用牙龈、牙周膜成纤维细胞最显著。结论骨碎补在有效作用浓度范围内，其促增殖效应和总蛋白含量与骨碎补浓度呈剂量依赖关系，随着浓度的增加促增殖作用增强、总蛋白含量增加，浓度达到最大作用后，随着浓度增加作用反而呈现减弱趋势。
