Comparison of the Marginal Fit of Cobalt-Chromium Metal-Ceramic Crowns Fabricated by CAD/CAM Techniques and Conventional Methods at Three Production Stages

• Autores: Francisco Real Voltas, Josep Cabratosa Termes, Magí Brufau de Barberá, Óscar Figueras Álvarez, Elisabeth Romano Cardozo
• Localización: The International Journal of Prosthodontics, ISSN-e 1942-4426, Vol. 30, Nº. 3, 2017, págs. 304-305
• Idioma: inglés
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• Resumen

  • Purpose: The aim of this study was to compare the marginal fit of cobalt-chromium crowns fabricated using conventional casts and computer-aided design/computer-assisted manufacturing (CAD/CAM) techniques at three stages of production: metal coping, after porcelain firing, and after cementation.

    Materials and Methods: A total of 80 metal-ceramic crowns were fabricated using four different techniques: lost wax casting, milling, laser sintering, and milling of a presintered metal block. Marginal fit was measured at each manufacturing stage.

    Results: The porcelain firing stage improved marginal fit. CAD/CAM techniques resulted in better marginal fit than did conventional casting techniques at all manufacturing stages.

    Conclusion: CAD/ CAM techniques improve marginal fit.