Jähnig A, Henkel S
Kieferorthopädische Abteilung des Zentrums 17, Zahn-, Mund- und Kieferheilkunde der Universität Göttingen.
Fortschr Kieferorthop. 1990 Aug;51(4):204-7. doi: 10.1007/BF02167350.
240 orthodontic brackets were bonded to buccal surfaces of bovine teeth. As bonding material we used four glass ionomer cements without etching and two normal orthodontic bracket bonding materials with etching of enamel. Brackets of group 1 were tested with a material testing machine for shear and tensile strength after ten minutes. Brackets of group 2, 3 and 4 were tested after one day, 28 days and 98 days, respectively. In the average the bonding strength of glass ionomer cements was 50% less than the bonding strength of the comparison group with etching. The fracture of the bonding took place to 80% between the mesh base and the glass ionomer cements. Defects of the enamel surface were never observed. The bonding between mesh-base and glass ionomer cements has to be improved before the use of this bonding material can be recommended for the use in a busy practice.
将240个正畸托槽粘结到牛牙的颊面。作为粘结材料，我们使用了四种未经酸蚀处理的玻璃离子水门汀以及两种经过牙釉质酸蚀处理的普通正畸托槽粘结材料。第1组托槽在十分钟后用材料试验机测试其剪切强度和拉伸强度。第2组、第3组和第4组托槽分别在一天、28天和98天后进行测试。平均而言，玻璃离子水门汀的粘结强度比经过酸蚀处理的对照组低50%。80%的粘结断裂发生在网基与玻璃离子水门汀之间。从未观察到牙釉质表面有缺陷。在推荐将这种粘结材料用于繁忙的临床实践之前，网基与玻璃离子水门汀之间的粘结必须加以改进。
