Abstract
Change in mechanical properties and microstructure of 7 commercially available amalgams (2 conventional, 4 high copper and 1 fluoride containing) immersed in water up to 12 months was examined.
Slight increase in compressive strength and also slight decrease in diametral tensile strength was observed in any case except for fluoride containing amalgam.With fluoride containing amalgam, eminent decrease in both compressive and diametral tensile strengths were observed.
Any change in static creep was also observed with amalgams except for the apparent increase in both lathe-cut conventional and fluoride containing amalgams. Apparent change in microstructure were observed with these two amalgams, indicating some relation with altered physical properties.
