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


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.
Aikaterini
A
Mikeli
Klaus W
KW
Boening
Benjamin
B
Lißke
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002516:Ceramics / Q000737:chemistry*; D002858:Chromium Alloys / Q000737:chemistry*; D003442:Crowns; D003775:Dental Polishing / Q000379:methods; D017269:Dental Prosthesis Repair; D019232:Dental Restoration Failure; D003801:Dental Veneers; D003780:Denture Repair; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D008297:Male; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D008875:Middle Aged; D010984:Platinum / Q000737:chemistry*; D019233:Retreatment; D012189:Retrospective Studies; D013499:Surface Properties
D002858:Chromium Alloys; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D010984:Platinum