玻璃离子水门汀(GIC)能与牙齿发生化学性粘结,具有与牙齿相近的热膨胀系数,边缘密封性能好,对牙髓刺激性小且能防止继发龋。但GIC作为充填材料时,其抗压强度和耐磨性明显低于银-汞合金,一般只用于,类洞、乳牙洞的修复,作者利用两种材料的互补性,将类洞邻面部分用GIC充填,牙合面 Glass ionomer cement (GIC) chemically bonds to the teeth, has a coefficient of thermal expansion similar to that of the teeth, has good edge sealing properties, is less irritating to the pulp and prevents secondary caries. However, the compressive strength and wear resistance of GIC as a filling material are obviously lower than those of silver-mercury amalgam, which are generally only used for the repair of cavities and deciduous cavities. By utilizing the complementarity of the two materials, Partially filled with GIC, occlusal surface