歯冠補綴物の周囲歯肉にみられる着色の原因性に関する検討 : 第2報 Ag_2Sの発現時期および合金成分による影響

概要

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The purpose of this study is to investigate the relationship between gingival discoloration and Ag_2S. Minute granules of dental alloys were embedded in the gingiva during a 5〜11 months span, and their histological and colorimetric analyses were undertaken. Resultsshowed the following ; 1. Cases of low melting silver alloy, 12% Au-Ag-Pd alloy, and Ni-Cr alloy all resulted in gingival discoloration, but it did not occur during the specified experimental period. 2. Regardless of the size of the granules or time, the electron microanalyser showed no signs of sulfer detection in cases of low melting silver alloy. However, in the case of 12% Au-Ag-Pd alloy, sulfer was detected 5 months later for only those granules having the sizeof 0.2〜0.3μm. No surfer was detected in cases of Ni-Cr alloy.3. Although no proliferation of inflammatory cells were observed around those areas surrounding the 12% Au-Ag-Pd alloy granules, they appeared in cases of the low melting silver alloy and Ni-Cr alloy.
日本補綴歯科学会の論文
1989-10-01