A compressive strength study of complete ceramic crowns. Part II.
The original study by this group compared the crushing strength of Cerestore crowns with porcelain-fused-to-metal crowns and porcelain jackets. Since that time, two porcelains, Dicor and Renaissance, have become available. This study compares Cerestore, Dicor, and Renaissance crowns using a porcelain-fused-to-metal crown as a standard for the type of crown with maximum strength that is currently available and an all-porcelain crown to represent the porcelain with the least strength. All of the methods used in the first study were used again. The results demonstrated that these new porcelains have strengths that make them questionable for routine use in every posterior crown situation.
Josephson
B A
BA
Department of Removable Prosthodontics, New York University, David B. Kriser Dental Center, New York, N.Y.
Schulman
A
A
Dunn
Z A
ZA
Hurwitz
W
W
D000537:Aluminum Oxide / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry*; D003442:Crowns; D003722:Dental Alloys / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis; D013314:Stress, Mechanical; D013499:Surface Properties
D003722:Dental Alloys; C047475:Dicor ceramic; D003776:Dental Porcelain; C050798:cerestore; D000537:Aluminum Oxide