ガリウム系金属練成充填材料の諸物性におよぼすPd添加の影響

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We manufactured two kinds of alloys, 0Pd (60.5 wt% Ag, 25.0 wt% Sn, 14.5 wt% Cu), and 2Pd (60.5 wt% Ag, 24.5 wt% Sn, 12.3 wt% Cu, 2.7 wt% Pd) for the experiment and compared them with the commercial gallium alloy GF (50.0 wt% Ag, 25.7 wt% Sn, 15.0 wt% Cu, 9.0 wt% Pd, 0. 3 wt% Zn).The compressive strength of both materials (1 hour and 24 hours after filling) showed satisfactory characteristics as designated Alloys for Dental Amalgam (JIS T6109). The initial compressive strength was increased by the addition of Pd to the meterial. Tensile strength of 2Pd and Gallium alloy GF (1 hour, 24 hours and 7 days after filling) gave similar data. Especially, from 0Pd (1 hour after filling), addition of Pd seemed to have a great influence. The range of dimensional change was -0.1〜+0.2%, which was in accordance with the Alloys for Dental Amalgam. These gallium alloys did not show first contraction from measurement. The expansion curve was in agreement with the course of their hardness. This suggests that the dimensional changes of these alloys correlated with the hardness. Creep was very small (0.07〜0.15%). This shows that these alloys are strong enough to bear the occlusal pressure even during the initial hardening. The corrosion resistance of the 0Pd and 2Pd alloys in various solutions, were increased compared to the Gallium alloy GF. Particularly, the corrosion resistance was raised. The decrease in the solution of ions was very important from the view point of biological safety, and shows that both 2Pd and 0Pd are very safe materials. The discoloration was also improved in these gallium alloys. The 2Pd alloy showed excellent results compared to the 0Pd and Gallium alloy GF.
福岡歯科大学学会の論文
1992-12-31

ガリウム系金属練成充填材料の諸物性におよぼすPd添加の影響

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