Dr. Moffa's suggestion of removing internal surface flaws in porcelain restorations is discussed in terms of ceramic fatigue mechanisms. His suggestions for development of a universal shade of porcelain are discussed. Dr. Moffa suggests that better clinical studies are needed for determining effectiveness of porcelain restorations.
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References
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Morena, R.; Lockwood, P.E.; Evans, A.L.; and Fairhurst, C.W. (1986b): Toughening of Dental Porcelains by Tetragonal ZrO2 Additions, J Am Ceram Soc69:C75-C77.
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