摘要
目的:研究4种表面处理方式对纤维桩粘结强度及机械性能的影响。方法:将50支POPO纤维桩随机分为5组,分别进行表面处理,每组10支。A组:不处理;B组:过氧化氢+抗坏血酸溶液;C组:高锰酸钾;D组:紫外线;E组:硅烷偶联剂+粘结剂。每组随机抽取6支进行三点弯曲强度测试,其余4支分别与核树脂粘结,切割成薄片试件,每组20个。37℃生理盐水中保存24 h,每组随机抽取10个进行10000次冷热循环,将所有试件置于万能试验机上进行微推出测试。结果:不同表面处理后,各实验组的粘结强度均比对照组显著提高(P<0.05),粘结强度D>B>C>E>A。冷热循环后各组粘结强度均降低(P<0.05)。表面处理后各实验组纤维桩的弯曲强度均比对照组低,除C组有统计学意义(P<0.05)外,A、B、D、E组均无显著差异(P>0.05)。结论:表面处理可以增强纤维桩与核树脂的粘结强度,其机械强度稍有降低,温度疲劳可以降低其粘结强度。
Objective： To evaluate the effect of 4 kinds of surface treatment methods on the bond strength and mechanical properties of fiber posts. Methods： 50 POPO fiber posts we-re randomly divided into 5 groups,respectively,surface treatment,each group of 10.Group A： No treatment; Group B： Hydrogen peroxide ＋ Ascorbic acid solution; Group C： Potassium permanganate; Group D： Ultraviolet light; Group E： Silane coupling agent ＋ Binder. Each group randomly selected 6 for three-point bending strength test,the other four were bonded with the resin,cut into thin pieces,each group of 20. Placed in 37℃ saline 24 h,each group randomly selected 10 for 10000 thermocycling,all the specimen placed in the universal testing machine for push-out test. Results： After different surface treatments,the bond strength of each experimental group was significantly higher than that of control group（P 0. 05）,and the bond strength was D B C E A. The bond strength of each group decreased after thermocycling（P 0. 05）. After surface treatment,the bendin-g strength of the fiber posts in experimental groups was reduced compared with that in the control group,Except for group C was statistically significant（P 0. 05）,there was no significant difference in A,B,D and E groups（P 0. 05）. Conclusion： The surface treatment can enhance the bond strength between the fiber post and the core resin,but its mechanical strength is slightly decrease,and the temperature fatigue can decrease its bond strength.
作者
许婷婷
侯玉泽
侯玉一
XU Ting - ting;HOU Yu - ze;HOU Yu - yi(Affiliated Stornatology Hospital of Jiamusi University;First Affiliated Hospital of Jiagnusi University HeilongiiangJiamusi 154002, China)
出处
《微量元素与健康研究》
CAS
2018年第3期20-22,共3页
Studies of Trace Elements and Health
基金
佳木斯大学研究生科技创新项目(YM2016-086)
关键词
纤维桩
粘结强度
弯曲强度
冷热循环
Fiber post
Bond strength
Bending strength
Thermocycling
