Resistance to fracture of ceramic jacket crowns.
The resistance to fracture of jacket crowns, fabricated of cast glass-ceramic and five traditional ceramics, was evaluated. Four identical jacket crowns of each type were constructed on absolutely equal dental abutments in epoxy resin, obtained from a primary mandibular molar. An increasing load was then applied to the mesiobuccal cusp of each of the 24 crowns. Although the glass-ceramic proved to have the highest fracture resistance, it was not significantly stronger than three other traditional ceramics; neither did it seem to be suitable for constructing jacket crowns on posterior teeth.
Passi
P
P
University of Padua, Dental School, Italy.
Girardello
G B
GB
Vesentini
A
A
D002516:Ceramics; D003442:Crowns; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D006801:Humans; D008422:Materials Testing; D008963:Molar; D011475:Prosthesis Failure; D013718:Tensile Strength
C047475:Dicor ceramic; D003776:Dental Porcelain