Galun E A, Saleh N, Lewinstein I
Laboratory for Biomaterials, Hebrew University-Hadassah School of Dental Medicine, Jerusalem, Israel.
J Prosthet Dent. 1994 Oct;72(4):424-9. doi: 10.1016/0022-3913(94)90564-9.
This study evaluated the diametral tensile strength of type I glass ionomer cements and measured their tensile and shear bond strengths to dentin with and without conditioning. Four brands of glass ionomer cement and one brand of zinc phosphate cement were tested. Disks of each cement type were prepared and the 7-day diametral compression test for tension was conducted. The shear and tensile tests, with and without 10% polyacrylic acid dentin conditioning, were performed with an Instron testing machine. Two additional groups, one for each bond test, were prepared and conditioned with 90% trichloracetic acid. No significant differences of the diametral strength were found among the various glass ionomer cements. The comparison of means suggests that, except for trichloracetic acid dentin pretreatment, the conditioning is an effective promoter of shear strength and has no significant effect (p < 0.01) on the tensile bond strength. However, trichloracetic acid was found to be a most effective dentin conditioner for both shear and tensile bond strengths (p < 0.01).
本研究评估了I型玻璃离子水门汀的径向拉伸强度，并测量了其在有无预处理情况下与牙本质的拉伸和剪切粘结强度。测试了四个品牌的玻璃离子水门汀和一个品牌的磷酸锌水门汀。制备了每种水门汀类型的圆盘，并进行了为期7天的径向拉伸直径压缩试验。使用Instron测试机进行了有无10%聚丙烯酸牙本质预处理的剪切和拉伸试验。另外制备了两个组，每组用于一种粘结试验，并用90%三氯乙酸进行预处理。在各种玻璃离子水门汀之间未发现径向强度有显著差异。均值比较表明，除了三氯乙酸牙本质预处理外，预处理是剪切强度的有效促进剂，对拉伸粘结强度无显著影响（p<0.01）。然而，发现三氯乙酸是剪切和拉伸粘结强度最有效的牙本质预处理剂（p<0.01）。
