Jamaluddin A, Pearson G J
Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Malaysia.
Asian J Aesthet Dent. 1993 Jan;1(1):19-23.
This study assessed the nature of the adhesion in repaired glass-ionomer restorative materials. Two chemically different glass-ionomer cements, Ketac Fil and Chemfil II Cap, and three different methods of conditioning the surface for repair were employed. Specimens of each material were prepared and the cut surfaces were then treated with either 35% phosphoric acid, 35% polyacrylic acid or a combination of phosphoric acid followed by polyacrylic acid. Freshly mixed material was injected against these treated surfaces and allowed to set under simulated intraoral conditions. The specimens were tested to failure in flexion after seven days storage. Assessment of the fractured surfaces was then carried out using the scanning electron microscope. The results showed the occurrence of both adhesive and cohesive failure.
本研究评估了修复后的玻璃离子修复材料的粘结性质。使用了两种化学性质不同的玻璃离子水门汀，即Ketac Fil和Chemfil II Cap，并采用了三种不同的表面处理方法进行修复。制备了每种材料的标本，然后将切割面分别用35%磷酸、35%聚丙烯酸或先磷酸后聚丙烯酸的组合进行处理。将新调和的材料注射到这些处理过的表面上，并在模拟口腔内条件下固化。标本在储存7天后进行弯曲破坏试验。然后使用扫描电子显微镜对断裂面进行评估。结果显示出现了粘结破坏和内聚破坏。
