Clinical fit of Procera AllCeram crowns.
BACKGROUND
Color stability, strength, and accuracy of fit are the main requirements for complete-ceramic crowns. The Procera AllCeram crown system is a CAD/CAM system used to fabricate individual complete-ceramic crowns that have a dry sintered, aluminum oxide core and appear to match clinical requirements. However, there are few articles about the clinical fit of all-ceramic crowns.


OBJECTIVE
This in vivo study measured the accuracy of fit of Procera AllCeram crowns in anterior and posterior teeth.


METHODS
The clinical fit of 80 anterior and posterior Procera AllCeram crowns was evaluated by a replica technique with a light body silicone to fill space between crown and tooth and a heavy body silicone to stabilize the light body film. After removal from the artificial crowns, the replicas were segmented, and measurements of the film thickness were performed with a light microscope.


RESULTS
Medians of mean marginal gap widths were between 80 and 95 microm in anterior teeth and between 90 and 145 microm in posterior teeth. Medians of maximal marginal gap widths ranged from 80 to 180 microm in anterior teeth and from 115 to 245 microm in posterior teeth.


CONCLUSIONS
The accuracy of fit achieved by Procera AllCeram was comparable to other conventional and innovative systems.
Boening
K W
KW
School of Dentistry, Technical University of Dresden, Germany. boening@rcs.urz.tu-dresden.de
Wolf
B H
BH
Schmidt
A E
AE
Kästner
K
K
Walter
M H
MH
D000328:Adult; D000368:Aged; D003442:Crowns; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain; D017267:Dental Prosthesis Design; D005260:Female; D006801:Humans; D008297:Male; D016876:Metal Ceramic Alloys; D008875:Middle Aged; D003765:Models, Dental; D017755:Prosthesis Fitting; D016628:Replica Techniques; D018709:Statistics, Nonparametric; D014025:Titanium
D016876:Metal Ceramic Alloys; C077451:Procera; D003776:Dental Porcelain; D014025:Titanium