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| 10%抗坏血酸钠对10%过氧化脲 外漂白后复合树脂充填体微渗漏的影响 |
| Effects of 10% sodium ascorbate on microleakage of composite resin restorations after external bleaching with 10% carbamide peroxide |
| 投稿时间：2013-12-02 修订日期：2014-01-14 |
| DOI： |
| 中文关键词: 抗坏血酸钠 外漂白 复合树脂 微渗漏 |
| 英文关键词:Sodium ascorbate External tooth bleaching with carbamide peroxide Composite resin Microleakage |
| 基金项目:上海市科学技术委员会项目(08DZ2271100和08JC1414500)上海市教委科研创新重点项目(09ZZ116) |
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| 中文摘要: |
| 目的：观察10%抗坏血酸钠与含表面活化剂（Tween，0.2%）的10%抗坏血酸钠对10%过氧化脲外漂白后复合树脂充填体微渗漏的影响。方法：选取牙体完整健康的人类离体前磨牙50颗，随机分为五组，第一组不漂白直接树脂充填，第二组用10%过氧化脲漂白后立即树脂充填，第三组漂白后将牙齿浸泡在人工唾液中三周再进行树脂充填，第四组漂白后先用10%抗坏血酸钠处理窝洞后再充填树脂，第五组漂白后先用含0.2%Tween的10%抗坏血酸钠处理窝洞后再进行树脂充填。然后。将五组样本进行2000个周期的冷热循环，2%亚甲基蓝染色24h，体视显微镜下观察剖面充填体的微渗漏情况。结果：第一组微渗漏值最低,第二组微渗漏值最高，第三、四组微渗漏值显著高于第一组但与第二组无显著性差异（P>0.05）；第五组渗漏值较第二组及第四组显著下降（P<0.05）。结论：10%过氧化脲外漂白致复合树脂充填体边缘微渗漏明显增加，含0.2%Tween的10%抗坏血酸钠处理窝洞可以有效减少该微渗漏的增加，延迟充填和单纯使用抗坏血酸钠不能有效减少微渗漏。 |
| 英文摘要: |
| PURPOSE: To investigate the effects of 10% sodium ascorbate, 10% sodium ascorbate combined with a surfactan（Tween，0.2%） on the microleakage of composite resin restorations after external tooth bleaching with 10% carbamide peroxide. METHODS: Fifty extracted human premolars, intact and health, were randomly divided into five groups：group 1 ,direct composite resin filling without bleaching; group 2 ,composite resin filling immediately after bleaching with 10% carbamide peroxide ; group 3 ,immersed in artificial saliva three weeks after bleaching ,then composite resin filling; group 4 ,cavity treated with 10% sodium ascorbate after bleaching and then composite resin filling; group 5 ,cavity treated with 10% sodium ascorbate combined with 0.2% Tween after bleaching and then composite resin filling. After 2000 thermal cycles, teeth were immersed in 2% methylene blue for 24 hours,then the microleakage of interface of restorations was observed under stereomicroscope. RESULTS:Group 1 displayed the least amount of microleakage, while group 2 showed the greatest amount of microleakage, group 3 and group 4 behaved similarly as group 2, having great amount of microleakage, showing no significant difference(P>0.05); the microleakage of group 5 decreased significantly (P< 0.05) compared to group 2 and group 4. CONCLUSION: The microleakage increased significantly after external bleaching with 10% carbamide peroxide, then decreased if cavities treated with 10% sodium ascorbate combined with 0.2% Tween, but delay filling and treated with sodium ascorbate only perform badly. |
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