含纳米羟磷灰石的过氧化氢漂白剂对釉质表面的影响  

The effect of hydrogen peroxide containing nano-hydroxyapatite on the enamel surface

作　　者：兰静[1] 王传勇[1] 薛晶[1] 蒋丽[1] 李伟[1] 

机构地区：[1]口腔疾病研究国家重点实验室华西口腔医院(四川大学),成都610041

出　　处：《国际口腔医学杂志》2013年第4期432-435,共4页International Journal of Stomatology

基　　金：口腔疾病研究国家重点实验室自主研究基金资助项目(SKLODSCU2008007)

摘　　要：目的探讨纳米羟磷灰石(nano-HA)溶液与过氧化氢(HP)溶液对釉质表面的影响。方法应用体外牛切牙制备釉质块标本72个,随机分为6组:去离子水(DW)组、HP+DW组、nano-HA+HP组、nano-HA+HP混合组、HP+nano-HA组、nano-HA+DW组。采用扫描电子显微镜和原子力显微镜观察处理前后的釉质表面结构,X线衍射检测表层釉质晶体结晶度的改变。结果 HP+DW组经处理后,釉质呈明显的脱矿表现,表面粗糙不平,颗粒间隙增大,出现明显孔隙,显微硬度明显降低,结晶度降低。在nano-HA+HP组、nano-HA+HP混合组、HP+nano-HA组处理后的釉质,其表面变得平整,显微硬度较HP+DW组的标本明显增加,结晶度有所增高。结论 HP溶液可以显著改变釉质的表面形态、降低其硬度和结晶度。nano-HA溶液与HP溶液联用特别是混合使用,可显著减少釉质表面的形态改变、降低显微硬度和结晶度。Objective To explore the effect of nano-hydroxyapatite （nano-HA） solution and hydrogen peroxide （HP） solution on the enamel surface. Methods Seventy-two bovine enamel blocks were randomly divided into six groups： Deionized water（DW） group, HP＋DW group, nano-HA＋HP group, nano-HA＋HP mixed group, HP＋nano-HA group, nano-HA＋DW group. Before and after the experiment, the samples were subsequently evaluated by microhard- hess tester through scanning electron microscope, atomic force microscope and X-ray diffraction. Results After the treatment, significant microhardness loss and morphological change of enamel and decreased crystallinity can be observed in HP＋DW group, in the nano-HA＋HP group or nano-HA＋HP mixed group or HP＋nano-HA group, enamel surface become smooth, microhardness increased significantly than the HP＋DW group and the crystallinity bounced. Conclusion HP solution can lead to significant morphology change of the enamel surface, hardness loss and crystallinity decreased. The solution of nano-HA and HP, especially the mixed solution can significantly decrease the morphology change of the enamel surface, the microhardness and crystallinity.

关 键 词：纳米羟磷灰石 过氧化氢 扫描电子显微镜 原子力显微镜 表面显微硬度 X线衍射 

分 类 号：R783[医药卫生—口腔医学]