Abstract
Abstract Given its remarkable properties, dental amalgam is still a favorable dental material. These alloys are produced in different varieties of chemical compositions and morphologies, such as lath-cut and spherical. However, the best mechanical and clinical properties have been observed in high-copper, non-zinc amalgams with disperse spherical particles. This is due to the absence of a weak γ2 phase in the microstructure. In the present work, fatigue behavior of three high-copper amalgams in air, physiological serum, and acetic acid (CH3COOH) environments under the loading frequency of 10 Hz have been investigated. Two of the amalgams are in the form of lath-cut and the other one is in the form of spherical particles. Results showed that the fatigue strength of spherical particle amalgams is more than that of lath-cut amalgams. Maximum and minimum fatigue strength were observed in acetic acid and physiological serum solutions, respectively. It seems that high fatigue strength of these amalgams in an ac...
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