Abraham Sheela B, Gaintantzopoulou Maria D, Eliades George
College of Dental Medicine, University of Sharjah, Sharjah, UAE.
School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
Int J Dent. 2017;2017:5957107. doi: 10.1155/2017/5957107. Epub 2017 Mar 30.
. To investigate the cavity adaptation of mineral trioxide (ProRoot MTA/MT), tricalcium silicate (Biodentine/BD), and glass ionomer (Equia Fil/EF) cements used as liners and the interfacial integrity between those liners and a composite resin placed as the main restorative material. . Standardized class I cavities (: 8 per group) were prepared in upper premolars. Cavities were lined with a 1 mm thick layer of each of the tested materials and restored with Optibond FL adhesive and Herculite Precis composite resin. Cavity adaptation of the restorations was investigated by computerized X-ray microtomography. The regions of interest (ROI) were set at the cavity-liner (CL) interface and the liner-resin (LR) interface. The percentage void volume fraction (%VVF) in the ROI was calculated. The specimens were then sectioned and the interfaces were evaluated by reflection optical microscopy, to measure the % length (%LD) of the interfacial gaps. Selected samples were further evaluated by scanning electron microscopy. Statistical analysis was performed by two-way ANOVA and Student-Newman-Keuls multiple comparison test ( = 0.05). . MT showed significantly higher %VVF and %LD values in CL interfaces than BD and EF ( < 0.05). No significant differences were found among the materials for the same values at the LR interfaces. . When used as a composite liner, ProRoot MTA showed inferior cavity adaptation at dentin/liner interface when compared to Biodentine and Equia Fil.
为研究用作衬层的矿物三氧化物（ProRoot MTA/MT）、硅酸三钙（Biodentine/BD）和玻璃离子水门汀（Equia Fil/EF）的窝洞适应性，以及这些衬层与作为主要修复材料的复合树脂之间的界面完整性。在上颌前磨牙中制备标准化的I类窝洞（每组8个）。窝洞用1毫米厚的每种测试材料衬层，并用Optibond FL粘结剂和Herculite Precis复合树脂修复。通过计算机X射线显微断层扫描研究修复体的窝洞适应性。将感兴趣区域（ROI）设置在窝洞-衬层（CL）界面和衬层-树脂（LR）界面。计算ROI中的孔隙体积分数百分比（%VVF）。然后将标本切片，通过反射光学显微镜评估界面，以测量界面间隙的长度百分比（%LD）。对选定的样本进一步进行扫描电子显微镜评估。采用双向方差分析和Student-Newman-Keuls多重比较检验进行统计分析（α = 0.05）。MT在CL界面的%VVF和%LD值显著高于BD和EF（P < 0.05）。在LR界面，相同值的材料之间未发现显著差异。当用作复合衬层时，与Biodentine和Equia Fil相比，ProRoot MTA在牙本质/衬层界面的窝洞适应性较差。
