| 不同酸蚀时间托槽与牙面间抗拉粘接力研究 |
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| 引用本文： | 冶录平,罗颂椒. 不同酸蚀时间托槽与牙面间抗拉粘接力研究[J]. 华西口腔医学杂志, 2003, 21(3): 189-190 |
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| 作者姓名： | 冶录平 罗颂椒 |
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| 作者单位： | 116021 大连市口腔医院正畸科( 冶录平),四川大学华西口腔医院正畸科( 罗颂椒) |
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| 摘 要： | 目的 测量不同酸蚀时间托槽与牙面间的粘接力 ,以探讨正畸临床上粘接托槽于牙面的最佳酸蚀时间。方法 选择 80颗正畸减数的恒双尖牙 ,根据托槽酸蚀时间 (1 5s和 6 0s)和施力方向 (0°和 4 5°)的不同 ,随机分为 4组 ,每组 2 0颗 ,用MTSNEW81 0 1 0 0KN液压伺服材料实验机测量托槽剪切粘接强度 ,并评价牙釉质表面粘接剂残留量。结果 1 5s酸蚀组托槽剪切粘接强度小于 6 0s酸蚀组 ,1 5s酸蚀组最小托槽剪切粘接强度均值为 5 86 2 5MPa;1 5s酸蚀组牙釉质表面粘接剂残留量明显少于 6 0s酸蚀组。结论 1 5s酸蚀组剪切粘接强度虽然小于 6 0s酸蚀组 ,但已能满足正畸临床需要 ,且 1 5s较 6 0s酸蚀组牙釉质表面粘接剂残留量少 ,临床去除托槽时操作时间短 ,可提高工作效率.
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| 关 键 词： | 正畸 酸蚀时间 粘接力 |
| 收稿时间： | 2003-06-25 |
| 修稿时间： | 2001-08-31 |
The Effects of Different Enamel Etching Time on Bonding Strength |
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| YE Luping ,LUO Songjiao.. The Effects of Different Enamel Etching Time on Bonding Strength[J]. West China journal of stomatology, 2003, 21(3): 189-190 |
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| Authors: | YE Luping LUO Songjiao. |
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| Affiliation: | *Department of Orthodontics, Dalian Stomatological Hospital, Dalian 116021, China |
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| Abstract: | Objective The aim of this study was to investigate the effect of short enamel etching time on bonding strength.Methods 80 healthy premolars were randomly divided into two equal groups, one was etched for 15 seconds, the other for 60 seconds, after normally bonding Edgewise brackets, the tooth specimen was stored in water at room temperature for 24 hours. An MTS NEW810 100KN testing machine was used to examine the shear force.Results Although the bonding strength for 15 seconds etching time was weaker than that for 60 seconds, the means of the bonding strength in 15 seconds group reached 5 862 5 MPa.Conclusion Etching for 15 seconds could provide enough bond strength for orthodontic practice. Furthermore, the adhesive remained on tooth after debonding was less by comparison with 60 seconds etching group, therefore brackets could be removed easily and the work efficiency could be increased in clinic by means of 15 seconds etching time.; |
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| Keywords: | orthodontics etching time bonding strength |
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