口腔医学研究

口腔医学研究 ›› 2016, Vol. 32 ›› Issue (10): 1083-1085.DOI: 10.13701/j.cnki.kqyxyj.2016.10.020

• 临床研究论著 • 上一篇    下一篇

不同过氧化物对牙釉质结构和硬度的影响

乃正刚, 苏世斌, 焦志新, 贾美娥, 王雪梅*   

  1. 兰州大学口腔医学研究所 甘肃 兰州 730000
  • 收稿日期:2016-04-07 出版日期:2016-10-26 发布日期:2016-10-26
  • 通讯作者: 王雪梅,电话:15101244260
  • 作者简介:乃正刚(1993~ ),男,甘肃兰州人,本科,主要从事牙齿美白方面研究工作。
  • 基金资助:
    兰州大学学生创新创业行动计划项目(编号:20151073001460)

Effect of Different Peroxides on Enamel Structure and Hardness.

NAI Zheng-gang, SU Shi-bing, JIAO Zhi-xin, JIA Mei-e, WANG Xue-mei*.   

  1. School of Stomatology, Lanzhou University, Lanzhou 730000, China
  • Received:2016-04-07 Online:2016-10-26 Published:2016-10-26

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摘要： 目的:探究30%过氧化氢(hydrogen peroxide,HP)、22%过氧化脲(carbamide peroxide,CP)、3%过硼酸钠(sodium perborate,SP)对离体牙漂白后牙齿釉质表面结构和硬度的差异。方法:筛选正常人离体牙标本并随机分为A、B、C、D 4组,分别用生理盐水、30%过氧化氢、22%过氧化脲、3%过硼酸钠对4组牙齿进行漂白处理,最后对离体牙进行电镜扫描(×2000)和维氏硬度测定并进行统计分析。结果:实验组与对照组相比,扫描电镜显示: 30%过氧化氢和3%过硼酸钠组,其釉质表面呈散在的孔状,蜂窝状破坏,说明牙齿出现了不同程度的脱矿、溶解;22%过氧化脲组牙齿釉质表面结构基本完整,无明显脱矿和溶解现象;硬度测定结果显示:组间两两比较存在差异性(P＜0.05),漂白后4个组牙齿硬度大小是:对照组＞22%过氧化脲组＞3%过硼酸钠＞30%过氧化氢。结论:3种过氧化物漂白试剂中22%过氧化脲对牙釉质结构和硬度的影响最小。

关键词: 漂白剂, 硬度, 电镜扫描

Abstract: Objective: To determine the enamel surface structure and hardness of the extracted teeth after bleached with three kinds of peroxide bleaching agent: 30% hydrogen peroxide (HP), 22% carbamide peroxide (result peroxide, CP) and 3% boric acid (sodium perborate, SP) commonly used in clinics. Methods: Specimens of the extracted teeth were randomly divided into four groups (ABCD) which were treated with normal saline, 30% hydrogen peroxide, 22% had carbamide peroxide and 3% boric acid sodium respectively. Then the teeth were observed by scanning electron microscope (2000) x and evaluated with Vickers hardness measurement, followed by statistical analysis. Results: Scanning electron microscopy showed that the enamel surface of teeth treated with 30% hydrogen peroxide and 3% boric acid sodium presented scattered honeycomb erosion, suggesting different degrees of tooth demineralization and dissolution. While the enamel surface of teeth treated with 22% over oxidation urea was intact, showing no obvious tooth demineralization and dissolution. Hardness determination results showed that statistical differences existed between groups with pairwise comparison (P<0.05). The hardness comparison of teeth treated with different groups were control group > 22% carbamide peroxide group > 3% over sodium borate > 30% hydrogen peroxide. Conclusion: Among the three tooth whitening agents, 22% cardamide peroxide showed the minimal impact on tooth enamel structure and hardness.

Key words: Bleaching agents, Hardness, Scanning electron microscope

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