An Evaluation of Two Modern All-Ceramic Crowns and their comparison with Metal Ceramic Crowns in terms of the Translucency and Fracture Strength
Background: Metal ceramic restorations are highly popular and are used for most of the crown and bridge restorations made today. Aims: To evaluate the translucency and fracture strength of two all-ceramic and traditional metal ceramic crowns. Materials and Methods: Thirty crowns of similar size and shape were constructed to fit a standard brass die. Ten crowns were manufactured from each of the following groups of materials: Vita Inceram, Metal Ceramic and Conventional all Ceramic. Modified Warpeha Goodkind test in which the ceramic crowns were fractured in an attempt to simulate the prosthetic configuration of the components. Results: The metal ceramic crowns were significantly more resistant to fracture than the two all-ceramic crowns, but all-ceramic crowns appeared to exhibit sufficient strength values to allow clinical evaluation. Conclusion: All-ceramic crowns exhibited far superior translucency than metal ceramic crowns.
Riley E. Ceramo-metal restoration. State of the science. Dental Clinics of North America 1977; 21 (4):669-82.
McLean J. The Science and Art of Dental Ceramics, Volume II. Chicago,. 1980;21-22:38-9.
Hondrum SO. A review of the strength properties of dental ceramics. The Journal of Prosthetic Dentistry 1992;67(6):859-65.
Warpeha Jr W, Goodkind R. Design and technique variables affecting fracture resistance of metal-ceramic restorations. The Journal of Prosthetic Dentistry1976;35(3):291-3.
Brodbelt R, O'brien W, Fan P, Frazer-Dib J, Yu R. Translucency of human dental enamel. Journal of Dental Research1981;60(10):1749-53.
Campbell SD. A comparative strength study of metal ceramic and all-ceramic esthetic materials: Modulus of rupture. The Journal of Prosthetic Dentistry1989;62(4):476-9.
Castellani D, Baccetti T, Giovannoni A, Bernardini U. Resistance to fracture of metal ceramic and all-ceramic crowns. The International Journal of Prosthodontics 1994; 7(2): 149-53.
Miller A, Long J, Miller B, Cole J. Comparison of the fracture strengths of ceramometal crowns versus several all-ceramic crowns. The Journal of Prosthetic Dentistry1992;68(1):38-41.
Pröbster L. Compressive strength of two modern all-ceramic crowns. The International Journal of Prosthodontics1992;5(5):409-14.
De Boever J, McCall W. Functional occlusal forces: an investigation by telemetry. The Journal of Prosthetic Dentistry1978 ;40(3):326-33.
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