Kimyai Soodabeh, Mashayekhi Zahra, Mohammadi Narmin, Bahari Mahmoud, Abed Kahnamouei Mahdi, Ebrahimi Chaharom Mohammad Esmaeel
Dental and Periodontal Research Center, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
J Dent Res Dent Clin Dent Prospects. 2022 Summer;16(3):159-163. doi: 10.34172/joddd.2022.027. Epub 2022 Nov 15.
Considering the increased use of preheating and novel resin-based materials to restore teeth, the present study investigated the impact of preheating on the flexural strength of a giomer and compared it with a nanohybrid composite resin. Two restorative materials (Beautifil II giomer and Alpha III nanohybrid composite resin) were used. Thirty rod-shaped samples (adding up to 60 samples) were prepared from the materials above and divided into two subgroups: with and without preheating (n=15). Before sample preparation, the giomer and nanohybrid composite resin tubes were preheated at 68ºC for 15 minutes in the preheating subgroups. In the subgroups without preheating, the tubes were kept in a room at 25ºC. Then the flexural strength was compared between the two groups with two-way ANOVA at a significance level of <0.05. The results showed significantly higher flexural strength in the preheated subgroups than in the non-preheated subgroups (<0.001). In addition, the mean flexural strength values were significantly higher in the giomer groups than in the nanohybrid composite resin groups (<0.001). Preheating increased the studied materials' flexural strengths significantly. The flexural strength of the giomer restorative material was higher than that of the nanohybrid composite resin, irrespective of preheating.
考虑到预热和新型树脂基材料在牙齿修复中的使用增加，本研究调查了预热对聚硅氧烷增强型玻璃离子聚合物（giomer）弯曲强度的影响，并将其与纳米混合复合树脂进行比较。使用了两种修复材料（Beautifil II聚硅氧烷增强型玻璃离子聚合物和Alpha III纳米混合复合树脂）。从上述材料制备了30个棒状样品（共60个样品），并分为两个亚组：有预热和无预热（n = 15）。在样品制备之前，聚硅氧烷增强型玻璃离子聚合物和纳米混合复合树脂管在预热亚组中于68ºC预热15分钟。在无预热的亚组中，将管子置于25ºC的房间中。然后用双向方差分析比较两组之间的弯曲强度，显著性水平<0.05。结果显示，预热亚组的弯曲强度显著高于未预热亚组（<0.001）。此外，聚硅氧烷增强型玻璃离子聚合物组的平均弯曲强度值显著高于纳米混合复合树脂组（<0.001）。预热显著提高了所研究材料的弯曲强度。无论是否预热，聚硅氧烷增强型玻璃离子聚合物修复材料的弯曲强度均高于纳米混合复合树脂。
