中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (34): 5453-5458.doi: 10.12307/2021.238

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

高浓度H2O2浸泡联合不同时长超声处理核桩对纤维桩-树脂界面黏结强度的影响

董  毅1,邓久鹏2,范新昊 3,席光伟4   

  1. 1沧州口腔医院,河北省沧州市   061000;2华北理工大学口腔医学院,河北省唐山市   063000;3开滦总医院口腔科,河北省唐山市   063000;4航天中心医院口腔科,北京市   100049
  • 收稿日期:2020-04-03 修回日期:2020-04-11 接受日期:2020-09-01 出版日期:2021-12-08 发布日期:2021-07-27
  • 通讯作者: 邓久鹏,硕士,副教授,华北理工大学口腔医学院,河北省唐山市 063000
  • 作者简介:董毅,男,1982年生,河北省沧州市人,汉族,硕士,主治医师,主要从事口腔医学研究

Effect of high-concentration H2O2 immersion and ultrasonic treatment with different durations on interfacial bonding strength of fiber post and resin

Dong Yi1, Deng Jiupeng2, Fan Xinhao3, Xi Guangwei4   

  • Received:2020-04-03 Revised:2020-04-11 Accepted:2020-09-01 Online:2021-12-08 Published:2021-07-27
  • Contact: Deng Jiupeng, Master, Associate professor, School of Stomatology, North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • About author:Dong Yi, Master, Attending physician, Cangzhou Stomatological Hospital, Cangzhou 061000, Hebei Province, China

摘要:

文题释义:
纤维桩:是在树脂基质中掺入一定含量纤维制成的,其中的纤维能够加强纤维桩的机械性能,防止基质断裂,而聚合基质(通常是环氧树脂)则可以保护纤维并具有可塑性。根据在聚合基质中所加的纤维不同可以将纤维桩分为碳纤维桩、玻璃纤维桩、石英纤维桩及聚乙烯纤维强化的树脂桩等。碳纤维桩虽然具有良好的机械性能,但其黑色的外观并不适合全瓷修复的美学要求。此后研制出的玻璃纤维桩和石英纤维桩可以满足美学要求,并且其机械性能与碳纤维桩接近,因此得到了广泛应用。
超声清洗技术:是利用超声波的空化作用及直进流作用等效应对沉浸于液体内部的物体表面污垢进行剥离、分散并进一步与液体发生乳化作用,从而达到对物体表面进行清洁的一种技术。由于该项技术对人体影响较小且对物品的清洁效率较高,因此被广泛用于医疗器械的清洁及牙体清洁等领域。
背景:采用H2O2直接浸泡纤维桩可增加纤维桩与复合树脂之间的黏结强度,但所需时间较长。
目的:比较单纯H2O2处理或合并不同时长超声清洗核桩后对纤维桩-树脂界面黏结强度的影响。
方法:取65支玻璃纤维预成根管桩,分为5组,每组13支:A组进行单纯硅烷化处理;B组浸泡于体积分数30%H2O2溶液15 min后进行硅烷化处理;C组浸泡于体积分数30%H2O2溶液同时进行超声荡洗2 min,最后行硅烷化处理;D组浸泡于体积分数30%H2O2溶液同时进行超声荡洗5 min,最后行硅烷化处理;E组浸泡于体积分数30%H2O2溶液同时进行超声荡洗15 min,最后行硅烷化处理,扫描电镜观察各组纤维桩表面形态。利用PP塑料吸管作为外部塑性支架,内部填充树脂黏结材料并插入处理后的纤维桩制成试件,应用金刚石砂轮机在每个纤维桩试件上切下1.5 mm厚度的3枚薄片,进行推出实验,解剖镜下观察薄片断裂情况。
结果与结论:①扫描电镜显示,A组纤维桩表面较平滑,可见少量暴露于表面的断裂玻璃纤维;B组纤维桩表面较粗糙,大量浅层玻璃纤维暴露于表面并断裂,可见大量玻璃纤维断裂后遗留的凹槽,凹槽内部较为平滑;C组纤维桩表面较粗糙,可见少量断裂的玻璃纤维及遗留的凹槽,凹槽内部粗糙;D组纤维桩表面粗糙程度大于C组,可见大量断裂的玻璃纤维及遗留的凹槽,凹槽内部较粗糙;E组纤维桩表面粗糙程度与D组相仿,可见大量断裂的玻璃纤维及遗留的凹槽,凹槽内部较平滑;②推出实验结果显示,C组黏结强度大于A、B、E组(P < 0.05),D组大于E组(P < 0.05),其余组间比较差异无显著性意义(P > 0.05);③C、D组的薄片断裂方式与A组比较差异有显著性意义(P < 0.05);④结果表明,体积分数30%的H2O2联合超声波荡洗2 min处理纤维桩可以显著提高纤维桩-树脂界面的黏结强度。
https://orcid.org/0000-0003-3943-3324 (邓久鹏) 

关键词: 材料, 口腔, 纤维桩, 树脂, 表面处理, 黏结强度, 过氧化氢, 超声震荡

Abstract: BACKGROUND: H2O2 treatment had been proven to be effective for enhancing the bonding strength of fiber pile-resin, with a time-consuming process.  
OBJECTIVE: To compare the effects of pure H2O2 treatment or combined with ultrasonic cleaning of core piles with different durations on the interfacial bonding strength of fiber post-resin.
METHODS:  Totally 65 glass fiber posts were randomly divided into five groups (n=13 per group): group A: pure silanization treatment; group B: immersed in 30% H2O2 solution for 15 minutes and then received silanization; 30% H2O2 solution immersion with ultrasonic washing for 2 minutes (group C), 5 minutes (group D) or 15 minutes (group E), respectively, then received silanization treatment. The surface roughness and fiber fracture of each specimen were observed by scanning electron microscope. The PP plastic straw was used as the external plastic support, filled with resin bonding material and inserted into the processed fiber post to make the test piece. Three slices with a thickness of 1.5 mm were cut from each fiber post specimen by diamond grinder, which was used to conduct wafer rush-out test, and the fracture of the slices was observed under anatomic microscope.  
RESULTS AND CONCLUSION: (1) Scanning electron microscope: Resin materials on the surface of the group A were evenly distributed, with smooth surface and rare fracture. In group B, surface was rough, and a lot of broken glass fibers were observed; a large number of grooves were left after glass fiber fracture, and the inner part of the groove was relatively smooth. In group C, the surface of the fiber post was rough, with a small amount of broken glass fiber and remaining grooves, and the grooves were rough inside. The surface roughness of fiber post was greater in group D than that of group C, and a large number of broken glass fibers and remaining grooves were observed. The inner roughness of the grooves was relatively rough. The surface roughness of the fiber post in group E was similar to that in group D; and there were a large number of broken glass fibers and remaining grooves, while the interior of the grooves was smooth. (2) Push-out test results showed that the bonding strength of group C was significantly higher than that of groups A, B and E (P < 0.05), and that of group D was significantly higher than that of group E (P < 0.05), and the difference between the other groups was not significant (P > 0.05). (3) The fracture mode of the thin section in groups C and D was significantly different from that in group A (P  <  0.05). (4) The results showed that the fiber posts treated with 30% H2O2 combined with ultrasonic wash for 2 minutes could significantly improve the bonding strength of the fiber post-resin interface.

Key words: materials, oral cavity, fiber post, resin, surface treatment, bonding strength, hydrogen peroxide, ultrasonic vibration

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