| 脱敏剂处理后牙本质粘结界面形态及粘结强度研究 |
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| 引用本文： | 熊正慧,夏露,韩光政,陈亚明.脱敏剂处理后牙本质粘结界面形态及粘结强度研究[J].口腔医学,2011,31(4):224-227. |
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| 作者姓名： | 熊正慧 夏露 韩光政 陈亚明 |
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| 作者单位： | 南京医科大学口腔医学研究所,南京医科大学附属口腔医院修复科,南京,210029 |
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| 摘 要： | 目的 探讨3种脱敏剂对牙本质粘结剂粘结强度和微观形态的影响。方法 12颗完整无龋的人第三磨牙,去除咬合面釉质,随机分为4组(n=3):A组(空白)、B组(Oravive)、C组(GC护牙素)、D组(氟化钠甘油)。A组不做处理,B、C、D组分别使用相应脱敏剂在牙本质表面处理,全部样本Prime&Bond NT树脂粘结剂粘结,复合树脂修复厚约4~5 mm,慢速切割机制成1.0 mm×1.0 mm×8.0 mm长方体试样,微拉伸测试仪测试粘结强度并进行统计学分析。体视显微镜下观察断裂模式,每组随机选取3个断裂前样本扫描电镜观察。结果 粘结强度A组最高(24.45±4.57)Mpa],与其它三组有统计学差异(P0.05);断裂模式多为粘结剂断裂的混合破坏,各组断裂模式间无统计学差异(P>0.05);扫描电镜观察A组混合层薄而致密,树脂突长而粗,其余三组混合层不均一,树脂突短而细。结论 3种脱敏剂可显著降低牙本质全酸蚀粘结剂的粘结强度。
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| 关 键 词： | 脱敏剂 微拉伸强度 断裂模式 扫描电镜 |
| 收稿时间： | 2015-10-12 |
A study of bond strength and bond interface morphology after desensitizers treatment |
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| XIONG Zheng-hui,XIA Lu,HAN Guang-zheng,CHEN Ya-ming.A study of bond strength and bond interface morphology after desensitizers treatment[J].Stomatology,2011,31(4):224-227. |
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| Authors: | XIONG Zheng-hui XIA Lu HAN Guang-zheng CHEN Ya-ming |
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| Institution: | XIONG Zheng-hui,XIA Lu,HAN Guang-zheng,CHEN Ya-ming.(The Research Institute of Stomatology,Department of Prosthodontics,School of Stomatology,Nanjing Medical University,Nanjing 210029,China) |
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| Abstract: | Objective To evaluate the effects of three desensitizers on bond strength of adhesive system and investigate the bond interface by scanning electron microscope(SEM).Methods Twelve intact and non-carious human third molars were divided randomly into four groups with 3 teeth in each group.The occlusal enamel was removed and treated.Group A was served as control group,and the other three groups were treated with Oravive,Tooth Mousse and 75% NaF glycerin respectively.Then all the specimens were bonded with Prim... |
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| Keywords: | desensitizers microtensile bond strength failure modes SEM |
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