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Strengthening of Feldspathic Porcelain by Ion Exchange and Tempering

Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville, Florida 32610-0446

C. Shen

Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville, Florida 32610-0446

R.B. Lee

Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville, Florida 32610-0446

This study investigated the effectiveness of tempering and ion-exchange treatments on crack growth and bi-axial flexural strength of seven feldspathic porcelains. The results showed that tempering treatment was more effective in strengthening porcelain than was the ion-exchange process as measured by the bi-axial flexural strength. However, the results of initial crack size induced by a microhardness tester showed that ion-exchange yielded a surface that was more resistant to crack initiation than was that yielded by the tempering treatment. EDX and microprobe analyses showed that there was evidence of exchange between Na⁺ within the porcelain surface and K⁺ from the ion-exchange agent applied on the surface.

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Journal of Dental Research, Vol. 71, No. 5, 1134-1138 (1992)
DOI: 10.1177/00220345920710050101


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				K.J. Anusavice, B. Hojjatie, and T.-C. Chang Effect of Grinding and Fluoride-gel Exposure on Strength of Ion-exchanged Porcelain Journal of Dental Research, August 1, 1994; 73(8): 1444 - 1449. [Abstract] [PDF]

This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Anusavice, K.J. Articles by Lee, R.B. Search for Related Content PubMed PubMed Citation Articles by Anusavice, K.J. Articles by Lee, R.B. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB CARBON CARBON BLACK POTASSIUM SILICON SILICON CARBIDE SODIUM Social Bookmarking                         What's this?