Histopathological study of damage to periodontal tissues by silver alloy metals in rats

Nihon Shishubyo Gakkai kaishi
K Watanabe

Abstract

Damage to periodontal tissues caused by dental materials (silver alloy powder) was examined by histopathological observation. Three kinds of silver alloy powder containing copper of various contents, such as that used in the first group: Ag-Cu (25% Cu), second group: Ag-In (5% Cu), and third group: Ag-Sn-Zn (0% Cu), were used to analyze damage to periodontal tissues caused by silver alloy powder. With No. 1/2 round bar, standardized small cavities were prepared in the mesiolingual cervical portion of the upper first molars of rats. Three kinds of silver alloy powder were then inserted into the small cavities. Postoperative changes in the gingival tissues were studied histopathologically. The results were as follows: 1. Under the light microscope, all three groups showed similar tissue reaction. Many dark deposit (metal) were observed in the lamina propria of the gingiva. These dark deposits had been taken into the histiocyte-like cells and multinucleate giant cells. Infiltration of cells was not observed around these dark deposits. Findings among the metals in three groups were of specific structures, which displayed black and dark-brown stained deposits in surrounding silver alloy powder. 2. Under the electron microscope, the ...Continue Reading

Citations

May 1, 1996·Critical Reviews in Toxicology·M A Hollinger

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