Under amplication of 1000,there were no Glass Ionomer Silver Reinforced Restorative in the dentine tubes.No microleakage of occlusa wall,axis wall and gingival wall was observed.

• 放大至1000倍后未见充填材侵入牙本质小管内,牙合壁、轴壁、颈壁处均未见微缝隙;