Department of Prosthodontics and Periodontics, Piracicaba Dental School, Campinas State University, São Paulo, Brazil.
Gerodontology. 2012 Jun;29(2):e155-60. doi: 10.1111/j.1741-2358.2010.00435.x. Epub 2010 Nov 11.
To evaluate the Vickers hardness of different acrylic resins for denture bases with and without the addition of glass fibres.
It has been suggested that different polymerisation methods, as well as the addition of glass fibre (FV) might improve the hardness of acrylic.
Five types of acrylic resin were tested: Vipi Wave (VW), microwave polymerisation; Vipi Flash (VF), auto-polymerisation; Lucitone (LT), QC20 (QC) and Vipi Cril (VC), conventional heat-polymerisation, all with or without glass fibre reinforcement (GFR) and distributed into 10 groups (n = 12). Specimens were then submitted to Vickers hardness testing with a 25-g load for 30 s. All data were submitted to anova and Tukey's HSD test.
A significant statistical difference was observed with regard to the polymerisation method and the GFR (p < 0.05). Without the GFR, the acrylic resin VC presented the highest hardness values, and VF and LT presented the lowest. In the presence of GFR, VC resin still presented the highest Vickers hardness values, and VF and QC presented the lowest.
The acrylic resin VC and VW presented higher hardness values than VF and QC resins. Moreover, GFR increased the Vickers hardness of resins VW, VC and LT.
评估不同的义齿基托丙烯酸树脂在添加和不添加玻璃纤维时的维氏硬度。
有人提出，不同的聚合方法以及添加玻璃纤维（FV）可能会提高丙烯酸的硬度。
测试了五种类型的丙烯酸树脂：Vipi Wave（VW），微波聚合；Vipi Flash（VF），自聚合；Lucitone（LT），QC20（QC）和 Vipi Cril（VC），均为传统热聚合，均有或没有玻璃纤维增强（GFR），并分为 10 组（n = 12）。然后将样品用 25 克的负载进行维氏硬度测试 30 秒。所有数据均进行方差分析和 Tukey 的 HSD 检验。
聚合方法和 GFR 对结果有显著的统计学差异（p < 0.05）。没有 GFR 时，VC 树脂的丙烯酸具有最高的硬度值，VF 和 LT 则具有最低的硬度值。在添加 GFR 的情况下，VC 树脂仍具有最高的维氏硬度值，VF 和 QC 则具有最低的硬度值。
VC 和 VW 树脂的丙烯酸具有比 VF 和 QC 树脂更高的硬度值。此外，GFR 提高了 VW、VC 和 LT 树脂的维氏硬度。
