CO-CR合金的模拟瓷烧成

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2019-12-10 DOI:10.22068/IJMSE.16.4.36

V. Dave, R. Kotian, Prashanthi Madhyastha, K. Boaz, P. Rao, B. P. Charitha

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引用次数: 1

摘要

本研究的目的是评估一种市售钴铬(Co-Cr)合金在瓷环温度下模拟热处理前后的硬度、腐蚀和细胞毒性。采用失蜡铸造工艺制备了5个Co-Cr样品。在650°C、750°C、850°C和950°C下进行热处理。测定了铸态和热处理试样的维氏硬度。采用动电位极化技术分别在0.1 N NaCl、1%柠檬酸和人工唾液中进行室温腐蚀试验。取患者牙龈组织活检培养，采用MTT比色法测定细胞活力。在650℃时硬度最低。0.1 N NaCl和1%柠檬酸腐蚀介质的腐蚀速率变化趋势相似。人工唾液的腐蚀速率最低。在临床长期使用中，烧成温度对Co-Cr合金的物理、化学和生物性能都有影响。

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Simulated Porcelain Firing of CO-CR Alloy

The aim of the present study was to assess the hardness, corrosion, and cytotoxicity of a commercially available cobalt-chromium (Co-Cr) alloy before and after simulated heat treatments at porcelain ring temperature. Five Co-Cr samples were fabricated using a lost wax casting procedure. Heat treatments were carried out at 650 °C, 750 °C, 850 °C, and 950 °C. Vickers hardness was measured for as-cast and heat-treated samples. The corrosion test was carried out separately in 0.1 N NaCl, 1% citric acid and arti cial saliva at room temperature using potentiodynamic polarization technique. Gingival tissue biopsy of patients was taken and cultured to measure the cell viability by MTT colorimetric assay. Lowest hardness was observed at 650 °C. 0.1 N NaCl and 1% citric acid corrosion medium showed a similar trend of corrosion rate. The least corrosion rate was found in arti cial saliva. Firing temperature has an impact on the physical, chemical, and biological properties of Co-Cr alloy in long-term clinical use.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.