Kaul Rudra, Choudhary Ashish, Kour Sukhbir, Singh Amitu, Kumari Neelu, Manish Kumar
Department of Conservative Dentistry and Endodontic, Indira Gandhi Government Dental College and Hospital, Jammu, Jammu and Kashmir, India, Phone: +91 8825039650, e-mail:
Department of Conservative Dentistry and Endodontic, Indira Gandhi Government Dental College and Hospital, Jammu, Jammu and Kashmir, India.
J Contemp Dent Pract. 2021 Apr 1;22(4):353-356.
To compare between mineral trioxide aggregate (MTA) mixed with water and water-based gel regarding shear bond strength with resin-modified glass ionomer cement (RMGIC) and composite.
In this study, 40 blocks of cylindrical shape were prepared with acrylic. These blocks were divided into four groups with each group consisting of 10 blocks: group-1A: MTA + distilled water + composite, group-1B: MTA + distilled water + RMGIC, group-2A: MTA + polymer + composite, and group-2B: RMGIC + MTA + polymer. After that, a universal testing machine was used for the measurement of shear bond strength. The acrylic blocks were placed under this machine. A blade with a knife-edge was used to provide a crosshead speed of 1 mm/minute. This was continued till bond of MTA in both forms (distilled water/gel) and restorative material failed.
It was observed that a statistically significant difference was found between MTAw + composite and MTAg + composite resin but no statistically significant difference between MTAw + RMGIC and MTAg + RMGIC with ≥ 0.05. It was found that a statistically significant difference was present between the RMGIC and composite groups within the same MTA type with ≤ 0.05.
It was concluded from the present study that MTA with a water-based gel has a better shear bond strength than composite resin and RMGIC materials.
It has been found that MTA has different properties when it is mixed with polymer and water. Very few studies have been conducted in the past to compare MTA mixed with water and water-based gel regarding the shear bond strength with RMGIC and composite.
比较与水混合的矿物三氧化物凝聚体（MTA）和水基凝胶与树脂改性玻璃离子水门汀（RMGIC）及复合树脂之间的剪切粘结强度。
本研究中，用丙烯酸制作了40个圆柱形块体。这些块体被分为四组，每组10个块体：1A组：MTA + 蒸馏水 + 复合树脂，1B组：MTA + 蒸馏水 + RMGIC，2A组：MTA + 聚合物 + 复合树脂，2B组：RMGIC + MTA + 聚合物。之后，使用万能试验机测量剪切粘结强度。将丙烯酸块体置于该机器下。使用带刀刃的刀片以1毫米/分钟的十字头速度进行测试。持续此操作直至两种形式（蒸馏水/凝胶）的MTA与修复材料之间的粘结失效。
观察到MTAw + 复合树脂与MTAg + 复合树脂之间存在统计学显著差异，但MTAw + RMGIC与MTAg + RMGIC之间无统计学显著差异，P≥0.05。发现在相同MTA类型中，RMGIC组与复合树脂组之间存在统计学显著差异，P≤0.05。
本研究得出结论，与水基凝胶混合的MTA比复合树脂和RMGIC材料具有更好的剪切粘结强度。
已发现MTA与聚合物和水混合时具有不同特性。过去很少有研究比较与水混合的MTA和水基凝胶与RMGIC及复合树脂之间的剪切粘结强度。
