Janani K, Ganesh S Balaji, Jayalakshmi S
Undergraduate Student, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India.
White Lab - Materials Research Centre, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India.
J Adv Pharm Technol Res. 2022 Nov;13(Suppl 1):S164-S167. doi: 10.4103/japtr.japtr_263_22. Epub 2022 Nov 30.
Resin-based composites are increasingly employed in dental restorations due to their esthetics. Flexural strength is the characteristic feature of a substance, and it can be described as the stress present in the material just before it renders in a flexure test. The purpose of this study was to determine the flexural strength of a bulk-fill composite following immersion in fruit juices. Ten samples of bulk-fill type composite filling material were created, with four samples from Restofill (Group 1) and four samples from Ivoclar Vivadent (Group 2). Out of which, four specimens of each brand were included for immersion in fruit juices; two specimens were kept as control. The eight samples were put through a flexural strength test, with four remaining as controls, before being measured for maximum force and displacement on the Instron E3000 universal testing equipment. SPSS version 23 (IBM SPSS Statistics for Windows, Version 23.0. Armonk, NY: IBM Corp.) was used to examine the calculated flexural strength. The composite Ivoclar has a mean flexural strength of 20.52, whereas the composite Restofill has a mean flexural strength of 20.55. The value for the independent sample -test between the two groups, Ivoclar and Restofill, was 0.089 (>0.05), which is statistically insignificant. It is clear from this research that the bulk-fill composite resin Ivoclar has a low flexural strength when compared to the sample Restofill after immersion in fruit juices.
基于树脂的复合材料因其美观性而越来越多地用于牙科修复。抗弯强度是一种物质的特性，可以描述为材料在弯曲试验中即将弯曲之前存在的应力。本研究的目的是确定大容量填充复合材料在果汁中浸泡后的抗弯强度。制备了10个大容量填充型复合填充材料样本，其中4个样本来自Restofill（第1组），4个样本来自义获嘉伟瓦登特（第2组）。其中，每个品牌的4个样本用于浸泡在果汁中；2个样本作为对照。在Instron E3000通用测试设备上测量最大力和位移之前，对这8个样本进行抗弯强度测试，另外4个样本作为对照。使用SPSS 23版（IBM SPSS Statistics for Windows，版本23.0。纽约州阿蒙克：IBM公司）来检验计算出的抗弯强度。义获嘉复合材料的平均抗弯强度为20.52，而Restofill复合材料的平均抗弯强度为20.55。义获嘉和Restofill两组之间独立样本t检验的值为0.089（>0.05），在统计学上无显著意义。从这项研究可以清楚地看出，与浸泡在果汁后的Restofill样本相比，义获嘉大容量填充复合树脂的抗弯强度较低。
