Sharma Ankita, Shetty Prashant Purandhar, Ali Afzal, Bhardwaj Monika, Dubey Deepa, Chhabra Swati
Department of Conservative Dentistry and Endodontics, MM College of Dental Sciences and Research, Ambala, Haryana, India.
Department of Conservative Dentistry and Endodontics, Pacific Dental College and Hospital, Udaipur, Rajasthan, India.
J Conserv Dent. 2021 Nov-Dec;24(6):576-579. doi: 10.4103/jcd.jcd_529_21. Epub 2022 Apr 1.
The study was aimed to evaluate and compare the compressive, diametral tensile, and flexural strengths of three different commercial resin based core materials and to single out the best resin-based core build-up material with respect to their physical properties among ParaCore® (Coltene Whaledent, USA), FlouroCore® 2+ (Dentsply International, USA), MultiCore® (Ivoclar Vivadent, Liechtenstein) with Miracle Mix® (GC America) core used as control.
One hundred and twenty samples were prepared, of which forty samples (10 of each material) were prepared in cylindrical stainless steel molds (height 6 mm, diameter 4 mm) for compressive strength measurements. Other forty samples (10 of each material) were prepared in cylindrical molds (diameter 6 mm, height 2 mm) for diametral tensile strength measurements. Forty samples (10 of each material) were prepared in stainless steel molds cuboidal in shape (length 25 mm, thickness 2 mm, and width 2 mm) for flexural strength measurements. The samples were tested on a Universal testing machine (Instron Machine 3366, made in the USA).
One-way analysis of variance was performed to determine any statistically significant differences ( < 0.05) among the resin-based core build-up materials with respect to their three respective strengths. Further, the statistical comparison was made among the four materials using Student's -test at a significance level of 5%.
Based on the results obtained it can be summarized that the ParaCore is the strongest material among all the four materials, followed by MultiCore, FlouroCore2+, and Miracle Mix. The Miracle mix is the weakest among all the materials owing to its inferior strength values.
The results of the present study imply that, in consideration of their superior strength values, resin-based core build-up materials, ParaCore, MultiCore, and FlouroCore2+ should be a preferred for use as core build-up material over Miracle Mix in specific clinical situations, in the same order of preference.
本研究旨在评估和比较三种不同的商用树脂核材料的抗压强度、径向拉伸强度和弯曲强度，并从ParaCore®（美国科尔tene惠尔登特公司）、FlouroCore® 2+（美国登士柏国际公司）、MultiCore®（列支敦士登义获嘉伟瓦登特公司）以及用作对照的Miracle Mix®（美国GC美国公司）核材料中，根据其物理性能挑选出最佳的树脂核构建材料。
制备了120个样本，其中40个样本（每种材料10个）在圆柱形不锈钢模具（高度6毫米，直径4毫米）中制备，用于抗压强度测量。另外40个样本（每种材料10个）在圆柱形模具（直径6毫米，高度2毫米）中制备，用于径向拉伸强度测量。40个样本（每种材料10个）在不锈钢长方体模具（长度25毫米，厚度2毫米，宽度2毫米）中制备，用于弯曲强度测量。样本在万能试验机（美国制造的英斯特朗3366型试验机）上进行测试。
进行单因素方差分析，以确定树脂核构建材料在其三种各自强度方面是否存在任何统计学上的显著差异（P<0.05）。此外，使用学生t检验在5%的显著性水平下对这四种材料进行统计比较。
根据获得的结果可以总结出，ParaCore是所有四种材料中强度最强的材料，其次是MultiCore、FlouroCore2+和Miracle Mix。Miracle mix由于其强度值较低，是所有材料中最弱的。
本研究结果表明，考虑到其优越的强度值，在特定临床情况下，树脂核构建材料ParaCore、MultiCore和FlouroCore2+应按相同的优先顺序优先于Miracle Mix用作核构建材料。
