本文系统追踪观察镓银合金充填后牙２０颗，对侧同名后牙同时充填ＧＫ高铜银汞合金５颗，观察６个月．发现两种充填物的物理、机械性能无差别，均无明显牙髓刺激症状，镓银合金充填术前后牙髓活力电测试参数无明显差别，镓银合金无致敏性．提示临床可应用镓银合金替代银汞合金，特别是用于后牙充填 In this paper, we observed 20 gallbladder alloys filled with gallium silver alloy, while the contralateral same-name posterior teeth were filled with 5 GK high-copper amalgams simultaneously for 6 months. The physical and mechanical properties of the two kinds of filling materials were found to be no difference. No obvious pulp-like irritation was observed. There was no significant difference in the parameters of pulp electrical activity before and after the filling of gallium-silver alloy. The gallium-silver alloy had no sensitization. Prompt clinical application of gallium argent alloy instead of silver amalgam, especially for posterior teeth filling