Additive effects of touch-activated polymerization and extended irradiation time on bonding of light-activated adhesives to root canal dentin,The Journal of Prosthetic Dentistry

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Additive effects of touch-activated polymerization and extended irradiation time on bonding of light-activated adhesives to root canal dentin
The Journal of Prosthetic Dentistry ( IF 4.6 ) Pub Date : 2021-01-08 , DOI: 10.1016/j.prosdent.2020.11.021
Wahyuni S Dwiandhany ₁ , Ahmed Abdou ₂ , Antonin Tichy ₃ , Kazuhide Yonekura ₄ , Masaomi Ikeda ₅ , Keiichi Hosaka ₆ , Junji Tagami ₇ , Masatoshi Nakajima ₈

Affiliation

Graduate student, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Lecturer, Department of Conservative Dentistry, Faculty of Dentistry, Hasanuddin University, Makassar, South Sulawesi, Indonesia.
Graduate student, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Lecturer, Biomaterials Department, Faculty of Oral and Dental Medicine, Modern University for Technology and Information, Mokatam, Cairo, Egypt.
Graduate student, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Graduate student, Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague, Prague, Czech Republic.
Clinical Fellow, Operative Dentistry Clinic, Tokyo Medical and Dental University Dental Hospital, Tokyo, Japan.
Senior Lecturer, Department of Oral Prosthetic Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Assistant Professor, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Professor, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Junior Associate Professor, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Statement of problem

The bonding of light-activated adhesives to root canal dentin with an additional touch-polymerization activator has been insufficiently examined.

Purpose

The purpose of this in vitro study was to investigate the effect of touch-polymerization activators and extended light-irradiation time on the microtensile bond strength (μTBS) of light-activated adhesives.

Material and methods

Post cavities were prepared in 50 extracted mandibular premolars and bonded using Prime&Bond Universal (PBU); PBU+Self Cure Activator (SCA); Clearfil SE Bond 2 (SEB); SEB+Clearfil DC Activator (DCA); or Clearfil Universal Bond Quick ER (UBQ). After light-irradiation for 10 or 20 seconds, the post cavities were filled with dual-activated resin core materials. Eight beams were prepared per specimen and subjected to the μTBS test. The μTBS data were analyzed by using 3-way ANOVAs with the Bonferroni correction (α=.05).

Results

The 3-way ANOVAs indicated that the use of touch-polymerization activators (SCA and DCA) significantly increased the μTBS of PBU and SEB in both the coronal (P=.015) and apical (P=.001) regions. The extension of light-irradiation time to 20 seconds significantly improved their μTBS in the apical region (P<.001), but not in the coronal region (P=.09). Light-irradiation for 20 seconds increased the μTBS of UBQ significantly in the coronal region (P=.014).

Conclusions

Touch-polymerization activators improved the bond strength of light-activated adhesives to root canal dentin, especially when combined with an extended light-irradiation time.

中文翻译：

触摸活化聚合和延长照射时间对光活化粘合剂与根管牙本质粘合的附加效应

问题陈述

使用额外的触摸聚合活化剂将光活化粘合剂与根管牙本质的结合尚未得到充分研究。

目的

这项体外研究的目的是研究触摸聚合活化剂和延长光照射时间对光活化粘合剂的微拉伸粘合强度 (μTBS) 的影响。

材料与方法

在 50 个拔除的下颌前磨牙中制备后腔，并使用 Prime&Bond Universal (PBU) 进行粘合；PBU+自愈活化剂（SCA）；Clearfil SE 债券 2 (SEB)；SEB+Clearfil DC 活化剂 (DCA)；或 Clearfil Universal Bond Quick ER (UBQ)。在光照射10或20秒后，用双活化树脂芯材料填充柱腔。每个试样制备八根梁并进行 μTBS 测试。通过使用具有 Bonferroni 校正 (α=.05) 的 3-way ANOVAs 分析 μTBS 数据。

结果

三因素方差分析表明，触摸聚合激活剂（SCA 和 DCA）的使用显着增加了 PBU 和 SEB 在冠状（P =.015）和顶端（P =.001）区域的 μTBS。将光照射时间延长至 20 秒显着提高了它们在顶端区域的 μTBS ( P <.001)，但在冠状区域则没有 ( P =.09)。光照20秒显着增加了冠状区UBQ的μTBS（P =0.014）。