【摘要】 本文应用6种材料在离体牙根作根管倒充填并做细胞附着实验,通过电镜摄片作材料密合度的测定和细胞附着情况的观察,以比较和筛选理想的倒充填材料。实验结果指出:玻璃离子体粘固粉具有良好的生物相容性和良好的边缘密合性。国产玻璃离子体粘固粉的性能与日本产的性能无大差别,可作为首选的根管倒充填材料。银汞合金密合性不仅比玻璃离子体粘固粉差,甚至不如磷酸锌粘固粉,生物相容性也不及玻璃离子体粘固粉。更多还原

【Abstract】 In order to evaluate and select an ideal root-canal retrofilling materials,six kinds ofmaterials were used in the canals of extracted teeth and after that cell attachment ex-periment was carried out in vitro.The results obtained from SEM observations.show-ed that among the materials tested,glass ionomer cement has the best biocompatibilityand marginal sealability.There was no qualities diffience between glass ionomerscem-ent made in China and in Japan.The marginal sealability of amalgam,a classic retrofi-lling material,is inferior not only to that of glass ionomer cement but also to that ofzinc phosphate cement,moreover,so does the biocompatibility.更多还原