Kerby R E, Knobloch L, Thakur A
Ohio State University, College of Dentistry, Department of Restorative Dentistry, Prosthodontics and Endodontics, Columbus 43210-1241, USA.
Oper Dent. 1997 Mar-Apr;22(2):79-83.
A new generation of glass ionomers containing polymerizable methacrylate monomers and/or prepolymers are now available for use as direct esthetic restorative materials. Proper clinical application of these new resin-modified glass ionomers requires an understanding of their benefits and limitations. The purpose of this investigation was to compare the compressive and diametral tensile strength at 1 hour, 24 hours, and 7 days of three visible-light-cured glass-ionomer cements, a polyacid-modified composite resin, and a composite resin core build-up material under both light-cure and dark-cure conditions. Statistical analysis indicated significant differences between several of the cements tested for both compressive and diametral tensile strengths at all three testing times (P > 0.05). Prosthodent composite resin and Vitremer tricure visible-light-cured glass-ionomer cement are significantly greater in both compressive and diametral tensile strength than any of the other materials tested after 7 days.
新一代含有可聚合甲基丙烯酸酯单体和/或预聚物的玻璃离子体现已可用作直接美学修复材料。正确临床应用这些新型树脂改性玻璃离子体需要了解它们的优点和局限性。本研究的目的是比较三种可见光固化玻璃离子水门汀、一种聚酸改性复合树脂和一种复合树脂核成型材料在光固化和暗固化条件下1小时、24小时和7天时的抗压强度和径向拉伸强度。统计分析表明，在所有三个测试时间，几种测试水门汀的抗压强度和径向拉伸强度之间存在显著差异（P>0.05）。7天后，义齿复合树脂和Vitremer三重固化可见光固化玻璃离子水门汀的抗压强度和径向拉伸强度均显著高于其他任何测试材料。
