纳米无定形磷酸钙对渗透树脂显微硬度及抛光性能的影响

发布时间：2018-02-26 18:33

  本文关键词： 无定形磷酸钙 渗透树脂 显微硬度 抛光性能　出处：《口腔医学研究》2017年06期 　论文类型：期刊论文

【摘要】：目的:探讨渗透树脂中加入纳米无定形磷酸钙后对树脂显微硬度及抛光性能的影响。方法:通过脱矿液建立人工龋模型,分别使用渗透树脂及加入纳米无定形磷酸钙的渗透树脂对龋模型进行渗透,使用显微硬度测试仪计算努氏硬度,利用扫描电子显微镜观察釉质抛光表面探究无定形磷酸钙加入渗透树脂后对树脂显微硬度及抛光性能的影响。结果:显微硬度测试后发现,渗透树脂组(C组)与脱矿组(B组)相比,显微硬度提高(P0.05),但较正常釉质组(A组),硬度值存在统计学差异(P0.05),纳米无定型磷酸钙渗透树脂组(D组)与正常釉质组(A组)相比,无统计学差异。扫描电镜观察显示,渗透树脂组(C组)及纳米无定形磷酸钙渗透树脂组(D组)经过相同步骤的抛光后,渗透树脂组(C组)表面光滑,孔隙小而少,有少量细滑痕,纳米无定形磷酸钙渗透树脂组(D组)表面不规整,孔隙较大,较C组显粗糙。结论:渗透树脂虽然可以较好恢复脱矿釉质表面的显微硬度,但与正常釉质存在差异,纳米无定形磷酸钙的加入,可以较好弥补渗透树脂这一缺点,但是会影响树脂的抛光性能。
[Abstract]:Objective: to study the effect of nano-amorphous calcium phosphate on the microhardness and polishing properties of the resin. Methods: artificial caries model was established by demineralizing solution. The dental caries model was permeated with osmotic resin and osmotic resin with nano-amorphous calcium phosphate, and the Knoop hardness was calculated by microhardness tester. The effects of amorphous calcium phosphate on the microhardness and polishing properties of enamel were investigated by scanning electron microscope. The microhardness of permeable resin group (C) was higher than that of demineralized group (B), but the hardness of group A was significantly higher than that of group A of normal enamel (P 0.05), and the group D of nano-amorphous calcium phosphate osmotic resin (group D) was higher than that of group A of normal enamel (P < 0.05), and that of group A (group D) was higher than that of group A of normal enamel (P < 0.05). There was no statistical difference. SEM observation showed that the surface of permeable resin group (C group) and nano-amorphous calcium phosphate osmotic resin group (group D) were smooth, and the pores were small and little after the same process of polishing. There were a few fine slips, and the surface of group D was irregular and the porosity was larger than that of group C. conclusion: the permeable resin can recover the microhardness of demineralized enamel surface better than that of group C. However, compared with normal enamel, the addition of nano-amorphous calcium phosphate can make up for the shortcoming of permeable resin, but it will affect the polishing performance of resin.
【作者单位】： 南京大学医学院附属口腔医院南京市口腔医院牙体牙髓病科;
【基金】：国家临床重点专科建设项目经费资助[卫生部卫办医政函(2011)873号] 江苏省科技发展计划项目(BE2011611)
【分类号】：R783.1
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本文编号：1539183