两种树脂桩修复方法对漏斗状根管粘接强度的影响

发布时间：2018-02-10 11:08

  本文关键词： 石英纤维桩 漏斗状根管 粘接强度 微推出实验　出处：《辽宁医学院》2015年硕士论文　论文类型：学位论文

【摘要】：目的对比同种树脂直接法与间接法制成的石英纤维桩修复漏斗状根管在不同截面上纤维桩树脂复合结构与根管牙本质间微推出的粘接强度,为临床应用提供依据。方法收集大小相近完整的上中切牙22颗,随机分为2组,预备成漏斗状根管,一组用直接法完成石英纤维树脂桩修复,另一组用间接法完成石英纤维树脂桩修复。两组中各随机抽取1颗制成切片后,用扫描电镜观察试件纤维桩树脂复合结构与牙本质界面图像;其余用于微推出实验,制成切片后用微推出方法检测两种方法粘接强度的大小,分析桩的制作方法和牙根不同部位对于纤维桩树脂复合结构与根管牙本质微推出粘接强度的影响。结果直接法与间接法制成石英纤维桩修复漏斗状根管时,桩的制作方法及牙根不同部位这两个因素对纤维桩树脂复合结构与根管牙本质间微推出粘接强度均有显著性影响(P0.001),两个因素之间交互作用对粘接强度影响显著(P0.001)。结论间接法制成石英纤维桩修复漏斗状根管中根颈部、根中部、根尖部的纤维桩树脂复合结构与根管牙本质间微推出粘接强度均分别显著高于直接法;间接法组:根颈部的粘接强度显著高于根中部,根中部的粘接强度显著高于根尖部;直接法组:根颈部的粘接强度显著高于根中部与根尖部,根中部与根尖部的粘接强度没有显著差异。通过扫描电镜图像显示:两种方法的相同部位中,间接法纤维桩树脂复合结构与牙本质间的间隙要小于直接法。相同方法中,从根颈部到根尖部桩与牙本质间的间隙逐渐扩大。
[Abstract]:Objective to compare the bonding strength between the resin composite structure of the funnel-shaped root canal repaired by the quartz fiber pile and the interdentin between the root canal and the dentine of the same resin directly and indirectly. Methods 22 upper central incisors of similar size were collected and randomly divided into 2 groups, which were prepared to be funnel-shaped root canals. In the other group, the quartz fiber resin post was repaired by indirect method. One of the two groups was randomly selected into sections, and then the images of the composite structure and dentin interface were observed by scanning electron microscope. The rest were used for microdeduction experiment. The bonding strength of the two methods was detected by microdeduction method after the slice was made. This paper analyzes the influence of the fabrication method of the post and different parts of the root root on the bonding strength between the resin composite structure of the fiber post and the dentin of the root canal. Results the direct method and indirect method are used to repair the funnel-shaped root canal with quartz fiber pile. The fabrication method of the post and the different parts of the root had significant effects on the bonding strength between the fiber post resin composite structure and the root canal dentin, and the interaction between the two factors had a significant effect on the bonding strength (P 0.001). Conclusion indirect quartz fiber post is used to repair the middle root neck of funnel root canal. In the middle of root, in the apical part of the root, the adhesive strength between the fiber post and resin composite structure and the micro-protruding between the root canal dentin was significantly higher than that in the direct method, while in the indirect method group, the adhesive strength of the root neck was significantly higher than that of the middle part of the root. The adhesive strength of the middle part of the root was significantly higher than that of the tip of the root, and that of the direct method group was significantly higher than that of the middle part of the root and the apical part of the root. There was no significant difference in adhesive strength between the middle of the root and the apical part of the root. In the same part of the two methods, the gap between the resin composite structure of the indirect fiber pile and the dentin was smaller than that of the direct method. The gap between the root neck and the root tip between the post and dentin gradually widened.
【学位授予单位】：辽宁医学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：R783.3

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