Abu-Bakr N, Han L, Okamoto A, Iwaku M
Niigata University, Faculty of Dentistry, Niigata, Japan.
J Prosthet Dent. 2000 Oct;84(4):444-52. doi: 10.1067/mpr.2000.109635.
Limited information is available about the mechanical behavior of compomer under intraoral conditions.
This in vitro study evaluated changes in the mechanical properties and surface texture of compomer and other materials, used in similar clinical circumstances, when immersed in various media.
Hardness measurement for 5 tested materials and 4 immersion media was obtained with a Vickers hardness testing machine. Compressive strength was measured using an Autograph at a crosshead speed of 0.75 mm/min. All readings were taken for up to a 60-day period. An electron probe microanalyzer was used to give an SEM image.
The average compressive strength and Vickers surface hardness showed a significant difference between materials. Results showed an overall increase in the solubility of specimens immersed in low pH soft drinks.
There was a difference in the mechanical properties and surface texture of the materials tested in this study when they were immersed in various media.
关于聚羧酸锌粘固粉在口腔内环境下的力学行为的信息有限。
本体外研究评估了聚羧酸锌粘固粉及其他在类似临床情况下使用的材料在浸入各种介质时其力学性能和表面质地的变化。
使用维氏硬度测试机对5种测试材料和4种浸入介质进行硬度测量。使用万能材料试验机以0.75毫米/分钟的十字头速度测量抗压强度。所有读数记录长达60天。使用电子探针微分析仪获取扫描电子显微镜图像。
材料之间的平均抗压强度和维氏表面硬度存在显著差异。结果表明，浸入低pH值软饮料中的试样的溶解度总体上有所增加。
本研究中测试的材料在浸入各种介质时，其力学性能和表面质地存在差异。
