Verma Vishakha, Mathur Shivani, Sachdev Vinod, Singh Divya
ITS-CDSR, Ghaziabad, Uttar Pradesh, India.
Department of Pedodontics and Preventive Dentistry, ITS-CDSR, Ghaziabad, Uttar Pradesh, India.
J Conserv Dent. 2020 Nov-Dec;23(6):550-553. doi: 10.4103/JCD.JCD_109_19. Epub 2021 Feb 11.
This study aimed to compare the compressive strength, shear bond strength, and microhardness of glass-ionomer cement (GIC) Type IX and Cention N.
Five samples each of GIC Type IX and Cention N were prepared for testing the shear bond strength, tensile strength, and microhardness. Cylinders of the samples measuring 1 cm diameter and 6 mm height were prepared for compressive strength and shear bond strength. For shear bond strength, these samples were embedded into acrylic blocks of dimensions 2 cm × 2 cm. Testing of shear bond strength and compressive strength was done by mounting the samples in a universal testing machine with a crosshead speed of 1 mm/min. The samples for microhardness were 1 cm diameter and 5 mm height. The samples were mounted on Vickers microhardness testing machine to test the microhardness.
The values for shear bond strength of Cention N were statistically highly significant ( < 0.01) as compared to GIC Type IX, whereas the compressive strength and microhardness values of Cention N were statistically significant ( < 0.5) as compared to GIC Type IX.
The results suggest significantly higher values for mechanical properties of Cention N as compared to GIC Type IX.
本研究旨在比较IX型玻璃离子水门汀（GIC）和Cention N的抗压强度、剪切粘结强度及显微硬度。
制备IX型GIC和Cention N各五个样本，用于测试剪切粘结强度、拉伸强度和显微硬度。制备直径1 cm、高6 mm的样本圆柱体，用于抗压强度和剪切粘结强度测试。对于剪切粘结强度测试，将这些样本嵌入尺寸为2 cm×2 cm的丙烯酸树脂块中。通过将样本安装在十字头速度为1 mm/min的万能试验机上进行剪切粘结强度和抗压强度测试。用于显微硬度测试的样本直径为1 cm、高5 mm。将样本安装在维氏显微硬度试验机上测试显微硬度。
与IX型GIC相比，Cention N的剪切粘结强度值具有高度统计学意义（<0.01），而Cention N的抗压强度和显微硬度值与IX型GIC相比具有统计学意义（<0.5）。
结果表明，与IX型GIC相比，Cention N的力学性能值显著更高。
