Ceramic Defects in Metal-Ceramic Fixed Dental Prostheses Made from Co-Cr and Au-Pt Alloys: A Retrospective Study

• Aikaterini ^[1] ; Klaus W ^[2] ; Benjamin ^[3]
  1. [1] Mikeli
  2. [2] Boening
  3. [3] Lißke

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• Localización: The International Journal of Prosthodontics, ISSN-e 1942-4426, Vol. 28, Nº. 5, 2015, págs. 487-489
• Idioma: inglés
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  • Purpose: Ceramic defects in porcelain-fused-to-metal (PFM) restorations may depend on framework alloy type. This study assessed ceramic defects on cobalt-chromium- (Co-Cr-) and gold-platinum- (Au-Pt-) based PFM restorations. Materials and Methods: In this study, 147 Co-Cr-based and 168 Au-Pt-based PFM restorations inserted between 1998 and 2010 (139 patients) were examined for ceramic defects. Detected defects were assigned to three groups according to clinical defect relevance. Results: Ceramic defect rates (Co-Cr-based: 12.9%; Au-Pt-based: 7.2%) revealed no significant difference but a strong statistical trend (U test, P = .082). Most defects were of little clinical relevance. Conclusions: Co-Cr PFM restorations may be at higher risk for ceramic defects compared to Au-Pt-based restorations.