A Study on Clinical Evaluation of Dental Casting Alloys

牙科铸造合金的临床评价研究

• 批准号: 60480420
• 负责人: MATSUI Yuko
• 金额: $ 4.29万
• 依托单位: Tokyo Medical and Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60480420/
• 关键词: dental casting alloy; clinical test; corrosion surface; EPMA

The following experiment was performed for the purpose of examining changes of dental casting alloys in human mouths. Class <II> cast inlays were fabricated with four kinds of dental casting alloys and had been temporarily fixed in molars of several young adults for 1 and 3 months. After 1 or 3 months temporary cementation, surface changes of each alloy were observed by SEM and the chemical composition was also analyzed by EPMA. The results are as follows.(1) Gold alloy and Ag-Pd-Cu-Au alloy showed very few changes in surface and there were few changes observed in chemical composition of both alloys in mouths.(2)Ag-Sn-Zn alloy was obviously changed in surface and remarkable changes were seen especially on buccal and gingival sides of proximal surface.(3)Though 70Ni-19Cr alloy showed remarkable changes in vitro and in vivo, few changes were observed in mouths. The cause of these results are now examining.

为了检查牙科铸造合金在人口中的变化，进行了以下实验。用<II>四种铸造合金制作类铸造嵌体，并将其暂时固定在几名青年人的磨牙中1个月和3个月。经1个月或3个月的临时渗压处理后，用扫描电镜观察合金表面的变化，用电子探针分析合金的化学成分。结果如下。(1)金合金和Ag-Pd-Cu-Au合金在口腔中的表面变化很小，两种合金的化学成分变化也很小。（2）Ag-Sn-Zn合金表面有明显的改变，以近侧面颊侧和龈侧改变最为明显。（3）70 Ni-19 Cr合金在体内、体外均表现出明显的变化，但在口腔中变化不大。这些结果的原因正在调查中。

项目成果

井上昌幸: 日本補綴歯科学会雑誌. 31. 1-7 (1987)

井上雅之：日本修复医学会杂志。31. 1-7 (1987)

Masayuki Inoue: "Incipient and Aggravating Factors of Marginal Periodontal Disease and Crown Restorations" J Jpn Prosthodont Soc. 31. 1-7 (1987)

Masayuki Inoue：“边缘牙周病和牙冠修复的早期和加重因素”J Jpn Prosthodont Soc。