Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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AN EXPERIMENTAL STUDY ON THE INITIAL AMALGAM CORROSION IN ARTIFICIAL SALIVA

인공타액에서 아말감 초기부식에 대한 실험적 연구

  • Kim, Mi-Ja (Department of Conservative Dentistry, College of Dentistry, Seoul National University) ;
  • Lee, Myung-Jong (Department of Conservative Dentistry, College of Dentistry, Seoul National University)
  • 김미자 (서울대학교 치과대학 치과보존학교실) ;
  • 이명종 (서울대학교 치과대학 치과보존학교실)
  • Published : 1992.10.25
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Abstract

The amounts of copper, mercury, silver, tin, and zinc released from conventional, dispersed phase and spherical high copper content amalgam immersed in artificial saliva soln. for periods of 2 hours, 1 day, 7 days, 30 days has been measured using Neutron Activation analysis and Atomic Absorption Spectrophotometry. The second electron image and EDX of the surface of samples immersed in artificial saliva were observed using SEM. The following results were obtained. 1. The dispersed non-$\gamma_2$ amalgam released more Hg, Ag than the $\gamma_2$-amalgams. Later a decrease of the release rate could be observed. 2. The dispersed high copper amalgam released more copper than low-copper amalgam and the release rate was decreased with time. But the amounts of copper released from Tytin increased with time. 3. Zinc was released all the experiment time. 4. EDAX showed that surface was composed of Ca,P, Sn, Ag, Zn, and Cu, but C1 was not detected. 5. The discontinued destructed surface was observed from the polished amalgam surface. High copper amalgam was destructed more than low copper amalgam.

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