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KMID : 0372919900110020295
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Journal of Biomedical Engineering Research
1990 Volume.11 No. 2 p.295 ~ p.303
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Fabrication of Glass Ceramics for Artificial Dental Tooth(I)
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Abstract
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In order to use for artificial dental tooth (dental crowens) , new glass-ceramics material has been studied. Its basic composition and the condition of heat treatment for crystalization, mechanical and chemical properties were investigated. Adding of the LAS system composition in the basic glass, time and temperature for crystalization were shortened. Fracture toughness (kic)of samples heat treated at 900℃ for 2 hours is 2.5-2.6MN/m3/2, the optimum condition of heat treatment for artificial tooth is A and B samples heating to 750℃ for 2 hours, raising to 900℃ and maintaining at 900℃ for 2 hours and C sample heating to 750℃ maintaining at 750℃ for 2 hours. In acid and’’’’alkali solution, chemical durability is excellent.
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