The effect of a root-dentin pretreatment technique combining PIPS with MTAD aiming to improve the bond strength of glass fiber post.,Microscopy Research and Technique

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The effect of a root-dentin pretreatment technique combining PIPS with MTAD aiming to improve the bond strength of glass fiber post.
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-03-18 , DOI: 10.1002/jemt.23474
Shu Wan ₁ , Yujie Tan ₁ , Jing Xie ₁ , Xiaoyu Huang ₁ , Ling Guo ₁

Affiliation

The aim of this study was to evaluate the combined effect of MTAD and photon‐induced photoacoustic streaming (PIPS) technique on the smear layer removal and the bond strength of glass fiber post. Fifty‐five human mandibular premolars were chosen. After root canal therapy and post space preparation, the teeth were equally divided to five groups according to the methods of root‐dentin pretreatment: G1: distilled water (control); G2: 2.5% NaOCl+17% EDTA; G3: MTAD; G4: PIPS; G5: MTAD+PIPS. One sample was randomly selected from each group, and scanning electron microscope (SEM) was used to observe the microscopic morphology of the coronal, middle and apical level of the root‐dentin. The remaining ten samples from each group were glued to glass fiber posts, and the bond strength was assessed by push‐out test. SEM evaluation showed that the most complete smear layer removal was found in MTAD + PIPS group, especially in coronal third. Push‐out test results exhibited that there was a statistically significant interaction between the experimental groups and root canal third (p < .0005). Significant differences could be found among five groups (p < .05): G5 > G4 > G3 > G2 > G1. G5 had the highest bond strength. In conclusion, post space pretreatments with MTAD or PIPS technique can significantly remove smear layer and improve the bond strength of glass fiber post, and combination of them works best.

中文翻译：

结合PIPS和MTAD的牙根预处理技术的效果旨在提高玻璃纤维桩的粘结强度。

这项研究的目的是评估MTAD和光子诱导的光声流（PIPS）技术对涂抹层去除和玻璃纤维桩的结合强度的综合作用。选择了55个人类下颌前磨牙。根管治疗和空间准备后，根据根-牙本质预处理方法将牙齿平均分为五组：G1：蒸馏水（对照组）； G1：蒸馏水（对照组）； G1：蒸馏水（对照组）。G2：2.5％NaOCl + 17％EDTA；G3：MTAD；G4：PIPS；G5：MTAD + PIPS。从每组中随机选择一个样品，然后使用扫描电子显微镜（SEM）观察根-牙本质的冠状，中层和根尖的微观形态。每组剩余的十个样品胶合到玻璃纤维桩上，并通过推出试验评估粘合强度。扫描电镜评估表明，在MTAD + PIPS组中，尤其是在冠状动脉第三者中，涂片层去除最彻底。推出测试结果显示，实验组与根管第三者之间存在统计学上的显着相互作用（p <.0005）。五个组之间存在显着差异（p <.05）：G5> G4> G3> G2> G1。G5具有最高的粘结强度。总之，采用MTAD或PIPS技术进行后期空间预处理可以显着去除污迹层并提高玻璃纤维桩的粘结强度，并且将它们组合在一起效果最佳。

更新日期：2020-03-18

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