Comparative fracture strength analysis of Lava and Digident CAD/CAM zirconia ceramic crowns
The Journal of Advanced Prosthodontics
;
: 92-97, 2013.
Article
Dans Anglais
| WPRIM
| ID: wpr-14724
ABSTRACT
PURPOSE:
All-ceramic crowns are subject to fracture during function. To minimize this common clinical complication, zirconium oxide has been used as the framework for all-ceramic crowns. The aim of this study was to compare the fracture strengths of two computer-aided design/computer-aided manufacturing (CAD/CAM) zirconia crown systems Lava and Digident. MATERIALS ANDMETHODS:
Twenty Lava CAD/CAM zirconia crowns and twenty Digident CAD/CAM zirconia crowns were fabricated. A metal die was also duplicated from the original prepared tooth for fracture testing. A universal testing machine was used to determine the fracture strength of the crowns.RESULTS:
The mean fracture strengths were as follows 54.9 +/- 15.6 N for the Lava CAD/CAM zirconia crowns and 87.0 +/- 16.0 N for the Digident CAD/CAM zirconia crowns. The difference between the mean fracture strengths of the Lava and Digident crowns was statistically significant (P<.001). Lava CAD/CAM zirconia crowns showed a complete fracture of both the veneering porcelain and the core whereas the Digident CAD/CAM zirconia crowns showed fracture only of the veneering porcelain.CONCLUSION:
The fracture strengths of CAD/CAM zirconia crowns differ depending on the compatibility of the core material and the veneering porcelain.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Dent
/
Zirconium
/
Céramiques
/
Collodion
/
Couronnes
/
Porcelaine dentaire
langue:
Anglais
Texte intégral:
The Journal of Advanced Prosthodontics
Année:
2013
Type:
Article
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS