Şermet Elbay Ülkü, Tosun Gül
Department of Pediatric Dentistry, Faculty of Dentistry, Kocaeli University, Kocaeli, Turkey.
Department of Pediatric Dentistry, Faculty of Dentistry, Selçuk University, Konya, Turkey.
J Dent Sci. 2017 Jun;12(2):112-120. doi: 10.1016/j.jds.2016.06.003. Epub 2016 Aug 10.
BACKGROUND/PURPOSE: Although current literature suggests that root canal sealers affect the bonding ability of restorative systems to pulp chamber dentin of permanent teeth, primary teeth have not been investigated. This study intended to evaluate the microtensile bond strength (μTBS) of three restorative systems to pulp chamber dentin in primary teeth and to determine the effect of two different root canal sealers on the μTBS.
Ninety primary molars were used in this study. The teeth were randomly divided into three main groups according to canal sealers: (1) control (without sealer); (2) Metapex; and (3) zinc-oxide eugenol. The main groups were further divided into three subgroups depending on the coronal restorative system: (1) compomer (Prime Bond NT + Dyract EXTRA); (2) composite (Clearfil Tri-S Bond + Clearfil Photo Posterior); and (3) resin-modified glass ionomer (Fuji II LC). After restoration, the buccal wall of the pulp chamber was sectioned to obtain sticks (1 mm × 1 mm). The μTBS was then measured. Data were analyzed with two-way analysis of variance, followed by a test. The interfacial morphology of the bonded space was evaluated using scanning electron microscopy.
In the control group, a significant difference was observed only for the μTBS of the composite (P < 0.05). Compared with the control groups, Metapex and zinc-oxide eugenol significantly reduced the μTBS of restorative systems (P < 0.05).
Composite materials seemed to bond to pulp chamber dentin in primary teeth with a higher strength than compomer and resin-modified glass ionomer. Metapex and zinc-oxide eugenol canal filling materials reduced the bond strength of all three restorative systems.
背景/目的：尽管当前文献表明根管封闭剂会影响修复系统与恒牙牙髓腔牙本质的粘结能力，但乳牙尚未得到研究。本研究旨在评估三种修复系统与乳牙牙髓腔牙本质的微拉伸粘结强度（μTBS），并确定两种不同根管封闭剂对μTBS的影响。
本研究使用了90颗乳磨牙。根据根管封闭剂将牙齿随机分为三个主要组：（1）对照组（无封闭剂）；（2）Metapex；（3）氧化锌丁香酚。主要组根据冠部修复系统进一步分为三个亚组：（1）复合树脂改性玻璃离子水门汀（Prime Bond NT + Dyract EXTRA）；（2）复合树脂（Clearfil Tri-S Bond + Clearfil Photo Posterior）；（3）树脂改性玻璃离子水门汀（Fuji II LC）。修复后，将牙髓腔的颊壁切片以获得小棒（1毫米×1毫米）。然后测量μTBS。数据采用双向方差分析，随后进行检验。使用扫描电子显微镜评估粘结空间的界面形态。
在对照组中，仅观察到复合树脂的μTBS有显著差异（P < 0.05）。与对照组相比，Metapex和氧化锌丁香酚显著降低了修复系统的μTBS（P < 0.05）。
复合材料与乳牙牙髓腔牙本质的粘结强度似乎高于复合树脂改性玻璃离子水门汀和树脂改性玻璃离子水门汀。Metapex和氧化锌丁香酚根管充填材料降低了所有三种修复系统的粘结强度。
