不同表面处理方法及根管深度对玻璃纤维桩粘接强度的影响

摘要/Abstract

摘要： 目的　比较4种表面处理方法以及在根管内的深度对纤维桩粘接强度的影响。方法　取25颗单根管前磨牙，常规根管治疗后随机分为五组。对25根POPO纤维桩分组进行表面处理:A组（对照组），B组（过氧化氢组），C组（硅烷组），D组（氢氟酸组），E组（乙醇钠组）。将纤维桩粘接于离体牙根管内并制作薄片试件，根据根管深度将试件分为根上部、根中部、根下部三个亚组，进行微推出试验测试粘接强度。扫描电镜下对各组纤维桩的外观形貌进行观察。结果　纤维桩粘接强度为B组>D组>E组>A组，各组间差异显著（P<0.05），C组与A组间差异无统计学意义（P>0.05）;纤维桩在根管不同深度的粘接强度为:根上部>根中部>根下部(P<0.05)；SEM观察显示，经处理后的各组纤维桩表面形貌与对照组相比可见纤维束暴露量增加。结论　除硅烷偶联剂外，HF，H2O2，乙醇钠均能显著提高玻璃纤维桩的粘接强度；随着根管深度的增加，纤维桩粘接强度逐渐减小。

关键词: 玻璃纤维桩, 表面处理, 粘接强度

Abstract: Objective　The effects of four surface treatment methods and the depth of root canal on the adhesive strength of glass fiber posts were compared. Methods　25 single-root premolars were randomly divided into five groups after conventional root canal therapy.Surface treatment of 25 popo Fiber piles:group A(untreatedl ),group B（H2O2），groupC（ silanization），group D（HF），group E（sodium ethoxide）.he fiber post was bonded into the isolated root canal and made into thin pieces. According to the depth of root canal, the specimen was divided into three subgroups: upper root, middle root and lower root，and use Microlaunch test to test bonding strength.Observation of the appearance and Morphology of Fiber piles in each Group under scanning Electron Microscopy. Results　The adhesive strength of fiber posts is :group B>group D>group E>group A,and the differences among groups are significant（P<0.05）.There was no significant difference between group C and group A(P>0.05). The bonding strength of fiber pile at different depths of root canal is as follows: upper root> middle root >lower root.Sem observation showed that the surface morphology of the treated groups was higher than that of the control group.Conclusions　H2O2,HF and sodium ethoxide can significantly improve the bonding strength of glass fiber posts;With the increase of root canal depth, the adhesive strength of fiber posts decreases gradually.

Key words: fiber post, surface treatment, bond strength

中图分类号:

R783.1

王玥谢伟丽李玥锟施梦汝徐琳于敬伟. 不同表面处理方法及根管深度对玻璃纤维桩粘接强度的影响[J]. 口腔医学, 2020, 40(1): 17-21.

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