Compressive strength of two modern all-ceramic crowns.
This study investigated the compressive strength of all-ceramic crowns manufactured using two recently introduced systems. The mean forces of fracture were 964 N for In-Ceram crowns, 814 N for paint-on IPS Empress crowns, and 750 N for layered IPS Empress crowns, compared with 1,494 N for metal ceramic crowns veneered on a nickel-chromium coping. The results indicate that clinical testing of these all-ceramic crowns is reasonable. Controlled, clinical, long-term evaluation is necessary to assess the safe application of these new crown systems.
Pröbster
L
L
School of Dentistry, University of Tubingen, Germany.
D000537:Aluminum Oxide; D000538:Aluminum Silicates; D001732:Bite Force; D003442:Crowns; D003735:Dental Casting Technique; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D003801:Dental Veneers; D006801:Humans; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D013718:Tensile Strength
D000538:Aluminum Silicates; C075815:IPS-Empress ceramic; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; C070870:In-Ceram; D000537:Aluminum Oxide