Objectives: The purpose of this study was to evaluate the influence of
glass fibers in strength acrylic resin fracture around a overdenture
abutment.
A model was designed to simulate the
clinical situation of an implant overdenture abutment (50-1
2-1.5mm).
thirty specimens were divided divided into 3 groups, ( 10 specimens
without glass fibers , 10 specimens with one glass fibers, 10
specimens with two glass fibers). All specimens were submitted to a
3-point bending test
The idea of use ceramic margins for metal-ceramic crowns was founded to
overcome problem of grayness for gingival margins that caused by metal collar in metal-ceramic crowns ,
but at the same time there are a lot of cautions on decrease mechanical
resistance for these restorations.
This study aims to study fracture resistance of metal-ceramic crowns with ceramic margins in 1 or 2 mm.
long, and compare it with mechanical resistance of metal-ceramic crowns with metal collar.
Background& Objective: This study was carried out to test fracture resistance of crowns with Zirconia
core made by CAD/CAM of two thicknesses, and test the influence of decreasing the core thickness on its
fracture resistance, and study the patterns of failure.
