Chung K H
Zhonghua Ya Yi Xue Hui Za Zhi. 1989 Mar;8(1):27-32.
The hardness of seven proprietary, light-cured, posterior composite resins was evaluated by three different hardness testers: the Knoop hardness tester, the Barcol indenter and the Rockwell 15T hardness meter. Specimens were measured after light-curing and 24-hour immersion in 37 degrees C water. Barcol hardness numbers ranged from 79.2 to 85.0. The Rockwell 15T hardness data had a range from 73.3 to 80.3 and the Knoop hardness numbers varied from 39.9 to 79.0. Relatively small variations were determined between results of Barcol hardness numbers and Rockwell 15T hardness data. Great variation was revealed in the results from Knoop hardness numbers. According to the dimensions of the indentations, the results of Barcol and Rockwell hardness represent the bulky part of tested composites rather than superficial hardness. Knoop hardness testing is found to be relatively feasible and a suitable measurement for the determination of superficial hardness of highly filled composite resins.
努氏硬度测试仪、巴氏硬度计和洛氏15T硬度计。在光固化后以及在37摄氏度水中浸泡24小时后对样本进行测量。巴氏硬度值范围为79.2至85.0。洛氏15T硬度数据范围为73.3至80.3，努氏硬度值在39.9至79.0之间变化。巴氏硬度值结果与洛氏15T硬度数据之间的差异相对较小。努氏硬度值结果显示出很大差异。根据压痕尺寸，巴氏硬度和洛氏硬度的结果代表了测试复合材料的主体部分，而非表面硬度。发现努氏硬度测试相对可行，是测定高填料复合树脂表面硬度的合适方法。
