Int J Stomatol

Inter J Stomatol ›› 2013, Vol. 40 ›› Issue (4): 432-435.doi: 10.7518/gjkq.2013.04.004

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

Lan Jing, Wang Chuanyong, Xue Jing, Jiang Li, Li Wei.   

  1. State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2012-10-11 Revised:2013-03-10 Online:2013-07-01 Published:2013-07-01

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Abstract:

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 microhardness 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.

Key words: nano-hydroxyapatite, hydrogen peroxide, scanning electron microscopy, atomic force microscope, surface microhardness, X-ray diffraction


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