The 'C'-test, which has been employed in the testing of industrial porcelain, offers several advantages when used with dental porcelain. In particular, specimens are similar in size and geometry to porcelain jacket crowns. This study evaluates the application of the 'C'-test for dental porcelain. The results showed good consistency and reproducibility, and those specimens constructed using a tin-oxide-coated foil did not display any greater strength than did those in which the platinum foil was not plated.
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References
1.
Edwards, M.R.; Jacobsen, P.H.; and Williams, G.J. (1983): The Three-point Beam Test for the Evaluation of Dental Porcelain, J Dent Res62:1086-1088.
2.
McLean, J.W. and Sced, I.R. (1976): The Bonded Alumina Crown. 1. The Bonding of Platinum to Aluminous Dental Porcelain using Tin Oxide Coatings, Aust Dent J21:119-127.
3.
Minassian, R. (1978): An Investigation into some Factors affecting the Strength of Porcelain Jacket Crowns. MDS Thesis, University of Bristol.
4.
Munoz, C.A.; Goodacre, C.J.; Moore, B.K.; and Dykema, R.W. (1982): A Comparative Study of the Strength of Aluminous Porcelain Jacket Crowns constructed with the Conventional and Twin Foil Technique , J Prosthet Dent48:271-281.
5.
Oram, D.A.; Davies, E.H.; and Cruickshanks-Boyd, D.W. (1984): Fracture of Ceramic and Metalloceramic Cylinders, J Prosthet Dent52:221-225.
6.
Philp, G.K. and Brukl, C.E. (1984): Compressive Strengths of Conventional, Twin Foil, and All-Ceramic Crowns, J Prosthet Dent52:215-220.
7.
Piddock, V.; Marquis, P.M.; and Wilson, H.J. (1984): The Role of Platinum Matrix in Porcelain Jacket Crowns, Br Dent J157:275-280.
8.
Ripperger, E.A. and Davids, N. (1947): Critical Stress in a Circular Ring, Trans Amer Soc Civil Eng112:619.
9.
Sced, I.R.; McLean, J.W.; and Hortz, P. (1977): The Strengthening of Aluminous Porcelain with Bonded Platinum Foils, J Dent Res56:1967-1069.
10.
Southan, D. and Jorgensen, K.D. (1972): Faulty Porcelain Jacket Crowns, Aust Dent J17:436-440.
11.
Tan, S.R.; May, G.J.; McLaren, J.R.; Tappin, G.; and Dav-Idge, R.W. (1980): Strength Controlling Flaws in Beta-Alumina, Trans J Br Ceram Soc79:120-127.
12.
Timoshenko, S. and Young, D.H. (1968): Elements of Strength of Materials, 5th ed. Princeton, New Jersey: Van Nostrand, p. 167.
