Peutzfeldt A, García-Godoy F, Asmussen E
Department of Dental Materials, School of Dentistry, University of Copenhagen, Denmark.
Am J Dent. 1997 Feb;10(1):15-7.
To determine the surface hardness and in vitro wear of glass ionomer cements (GIC) and compomers in comparison with a resin composite and to test for a possible correlation between the determined hardness and wear values.
Samples were made of conventional GIC (Ketac-Fil, Fuji II, Fuji IX, Ketac-Prototype = Ketac-Molar), resin-modified GIC (Photac-Fil, Fuji II LC, Vitremer), compomers (Dyract, Compoglass) and resin composite (Z100) for the hardness test (n = 10) and for the wear test (n = 3). The materials were handled according to the manufacturers' instructions. The samples were stored in deionized water for 48 hours at 37 degrees C prior to the determination of Rockwell hardness and three-body in vitro wear.
Hardness could not be measured on Ketac-Fil and Fuji II as the samples fractured before a reading was obtainable. Statistically significant differences were found in hardness and wear between brands and between the four types of material. Surface hardness: resin-modified GIC < conventional GIC = compomers < resin composite. In vitro wear: resin-modified GIC > compomers > conventional GIC > resin composite. A negative correlation between hardness and wear was recorded.
与树脂复合材料相比，测定玻璃离子水门汀（GIC）和复合体的表面硬度及体外磨损情况，并测试所测定的硬度与磨损值之间是否可能存在相关性。
制备常规GIC（Ketac-Fil、Fuji II、Fuji IX、Ketac-Prototype = Ketac-Molar）、树脂改性GIC（Photac-Fil、Fuji II LC、Vitremer）、复合体（Dyract、Compoglass）和树脂复合材料（Z100）的样本，用于硬度测试（n = 10）和磨损测试（n = 3）。材料按照制造商的说明进行处理。在测定洛氏硬度和三体体外磨损之前，将样本在37℃的去离子水中储存48小时。
由于样本在获得读数之前就已断裂，因此无法对Ketac-Fil和Fuji II进行硬度测量。在不同品牌之间以及四种材料类型之间，硬度和磨损存在统计学上的显著差异。表面硬度：树脂改性GIC＜常规GIC = 复合体＜树脂复合材料。体外磨损：树脂改性GIC＞复合体＞常规GIC＞树脂复合材料。记录到硬度与磨损之间呈负相关。
