Methods The level of S-Hg of 16 specimens on each time-point before or after amalgams filling were tested by means of absorbed spectrometry,and analysed by SAS program.

• 方法用冷原子吸收光谱法测定16名实验对象银汞合金充填前和充填后各时间点唾液汞量,用SAS软件程序进行分析统计。