| Autor: |
UNO, MITSUNORI, KAWAKI, HARUMI, NONOGAKI, RYUGO, HONDA, AYUMU, SAWANO, MIKU, SAWADA, TOSHIKO, OKA, TOSHIO, KONDOH, NOBUO, KURACHI, MASAKAZU, ISHIGAMI, HAJIME, Doi, Yutaka |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
岐阜歯科学会雑誌 = The Journal of Gifu Dental Society. 46(1):9-16 |
| ISSN: |
2433-0191 |
| Popis: |
We investigated porcelain reinforcement achieved through ion exchange using newly developed potassium-containing of 3 types pastes. The surface of dental porcelain was first covered by the paste and then fired to promote ion exchange of sodium in the porcelain with potassium in the paste. The ion exchange significantly suppressed crack extension on the porcelain surface but did not alter the Vickers hardness. This is likely because residual compressive stress was successfully created on the porcelain surface after the ion exchange of Na+ with K+. More important from an aesthetic standpoint is that the ion exchange showed no essential influence on the porcelain color. The results of the present study showed that enhancement of the physical properties of dental porcelain by ion exchange using a potassium-containing paste is effective. As a result, the extension of porcelain cracks induced by stress caused by daily occlusal contacts could be successfully suppressed, allowing the dental porcelain to maintain its quality over a long period. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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