Metal-ceramic failure in noble metal crowns: 7-year results of a prospective clinical trial in private practices.
OBJECTIVE
The aim of this study was to evaluate the clinical performance of metal-ceramic crowns placed in 10 private practices.


METHODS
In this prospective clinical trial, 95 patients were provided with 190 noble-metal metal-ceramic single crowns.


RESULTS
The 7-year survival rates of the crowns were 95.5% (target event: any removal), 99.5% (target event: removal because of defective veneer), and 92.4% (target event: metal-ceramic complication of any kind). No significant explanatory variables for metal-ceramic complications could be detected by bivariate and multivariate testing. The consequences resulting from metal-ceramic defects were of minor clinical significance in most cases.


CONCLUSIONS
The findings support previous claims that metal-ceramic restorations perform very well clinically, including in practices outside academic environments.
Reitemeier
Bernd
B
Department of Prosthetic Dentistry, School of Dentistry, Dresden University of Technology, Dresden, Germany. bernd.reitemeier@uniklinikum-dresden.de
Hänsel
Kristina
K
Kastner
Christian
C
Walter
Michael H
MH
D000328:Adult; D000538:Aluminum Silicates / Q000737:chemistry; D003442:Crowns / Q000009:adverse effects; D003776:Dental Porcelain / Q000737:chemistry*; D019232:Dental Restoration Failure; D003801:Dental Veneers / Q000009:adverse effects; D005260:Female; D005500:Follow-Up Studies; D005708:Gallium / Q000737:chemistry; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D007204:Indium / Q000737:chemistry; D008297:Male; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D008875:Middle Aged; D010165:Palladium / Q000737:chemistry; D010984:Platinum / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry; D011446:Prospective Studies; D016019:Survival Analysis
D000538:Aluminum Silicates; C095718:Duceram; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D017680:Potassium Compounds; D007204:Indium; D003776:Dental Porcelain; C016447:feldspar; D010984:Platinum; D010165:Palladium; D005708:Gallium