缩短酸蚀时间对乳牙及年轻恒牙粘结强度的影响

›› 2017, Vol. 37 ›› Issue (10): 871-875.

缩短酸蚀时间对乳牙及年轻恒牙粘结强度的影响

李文文¹,姜丽丽¹,吕晶¹,吕学超¹,朱颐馨¹,刘英群²

1. 哈尔滨医科大学附属第一医院
2. 哈尔滨医科大学口腔医学院

收稿日期:2017-02-14 修回日期:2017-05-10 出版日期:2017-10-28 发布日期:2017-10-13
通讯作者: 刘英群 E-mail:lyq3311@126.com
基金资助:
黑龙江省自然科学基金项目

Effect of shortening the etching time on bonding strength of primary teeth and immature permanent teeth

Received:2017-02-14 Revised:2017-05-10 Online:2017-10-28 Published:2017-10-13

摘要/Abstract

摘要： 目的　研究缩短酸蚀时间对乳牙及年轻恒牙粘结强度的影响，为临床上更恰当掌握酸蚀时间提供一定的理论指导。方法　选取新鲜拔除无龋坏乳磨牙20颗，无龋坏年轻恒牙20颗，磨除牙面牙釉质，形成牙本质平面。乳牙随机分为A、B、C、D组，年轻恒牙随机分为E、F、G、H组，A、B组和E、F组牙本质应用Single Bond 2（SB2）全酸蚀粘结系统，A、E组酸蚀15 s；B、F组酸蚀7 s；C、D组和G、H组应用Kerr Optibond Versa(OV)自酸蚀粘结系统,C、G组用前处理剂酸蚀20 s；D、H组用前处理剂酸蚀10 s，树脂分层固化，恢复牙冠。用低速锯将牙齿片切成横截面积约为1.0 mm×1.0 mm的长方体状样本，进行微拉伸强度（μTBS）的测试。结果　微拉伸强度分别为A组（14.95?3.79）MPa，B组（16.74?2.77）MPa，C组（20.80?3.97）MPa，D组（20.50?3.98）MPa，E组（20.95?2.68）MPa，F组（17.26?3.32）MPa，G组（25.70?2.95）MPa，H组（20.98?3.13）MPa，A组与B组，C组与D组无统计学差异；F组＜E组，H组＜G组，差异有统计学意义（P＜0.05）；C组＞A组；D组＞B组；G组＞E组；H组＞F组，差异有统计学意义（P＜0.05）。结论　缩短酸蚀时间，乳牙的粘结强度没有明显变化，年轻恒牙的粘结强度明显降低；应用OV自酸蚀粘结系统的粘结强度高于应用SB2全酸蚀粘结系统的粘结强度。

关键词: 乳牙, 年轻恒牙, 微拉伸粘结强度

Abstract: Objective　To study the effect of shortening the time of etching on the bonding strength of primary teeth and immature permanent teeth to provide some theoretical guidance for more proper control of acid etching time clinically. Methods　20 fresh and not crack primary molars, 20 not crack immature permanent teeth were selected and the enamel of tooth surface was grinded to form the dentin plane. Primary teeth were randomly divided into A, B, C, D group and immature permanent teeth were divided into E, F, G, H group. Group A and E should be etched for15 seconds by SB2, 7 seconds for group B and F. Group C and G should be etched by OV for 20 seconds, and 10 seconds for group D and H. Then layered resin was solidified and the crowns were restore. Finally, the teeth were cut piece into a cuboid shape sample with a cross-sectional area about 1.0 mm×1.0 mm and then micro tensile strength test was carried out. Results　Micro tensile strengths respectively were group A（14.95?3.79）MPa, group B（16.74?2.77）MPa, group C（20.80?3.97）MPa, group D (20.50?3.98)MPa, group E（20.95?2.68）MPa，group F（17.26?3.32）MPa，group G (25.70?2.95)MPa, group H (20.98?3.13)MPa. There was no significant difference between group A and group B ,group C and group D. Group F ＜ group E and group H ＜group G, the difference was statistically significant(P ＜0.05); Group C ＞ group A; group D ＞ group B; group G ＞group E; group H ＞ F group, the difference was statistically significant(P ＜0.05). Conclusions　Shortening the acid etching time, the bonding strength of the primary teeth did not change significantly, but the bonding strength of the immature permanent teeth significantly reduced; the bonding strength of applying OV is higher than that of the application of SB2 .

Key words: primary teeth, immature permanent teeth, Microtensile strength

中图分类号:

R783.1

李文文姜丽丽吕晶吕学超朱颐馨刘英群. 缩短酸蚀时间对乳牙及年轻恒牙粘结强度的影响[J]. , 2017, 37(10): 871-875.

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