الفهرس 
Fracture resistance of zirconia based crowns veneered with two different techniques
ContentsOnly 14 pages are availabe for public view
 |  | from | 190 |  |  |
| | | from | 190 | | |
Abstract
Although zirconia based all ceramic restorations are now widely used, high failure rates due to post chipping of the veneering porcelain has been identified as a major technical complication. The purpose of this study was to evaluate the fracture resistance of CAD / CAM zirconia crowns veneered with different techniques: CAD veneering technique with glass joining, CAD veneering technique with adhesive resin bonding and Conventional layering technique. Material and Methods. Thirty zirconia-based crowns were fabricated using CEREC CAD / CAM system on specially designed stainless steel dies. The crowns were divided in to 3 groups according to veneering technique: group A: CAD / CAM generated zirconia copings received CAD / CAM fabricated high strength veneering caps joined with an intermediate glass joint. (n = 10), group B: CAD/CAM generated zirconia copings received a CAD / CAM fabricated veneering caps joined by adhesive resin cement