Strength, reliability, and mode of fracture of bilayered porcelain/core ceramics.

Purpose: The aim of this investigation was to compare the biaxial flexural strength, its reliability, and the mode of fracture of bilayered disks made of two core materials (In-Ceram Alumina and In-Ceram Zirconia), both veneered with conventional feldspathic porcelain (Vita Alpha).

Materials And Methods: One hundred forty specimens (monolithic and bilayered) of In-Ceram Alumina, In-Ceram Zirconia, and Vita Alpha were made and tested with the biaxial flexural test. Finite element analysis was used to estimate the maximum tensile stress at fracture.

Strength, reliability and mode of fracture of bilayered porcelain/zirconia (Y-TZP) dental ceramics.

The aim of this study was to investigate the biaxial flexural strength, reliability and the mode of fracture of bilayered porcelain/zirconia (Y-TZP) disks. For this purpose, 80 specimens were made from conventional dental porcelain and Y-TZP core ceramic, and equally divided into four groups as follows: monolithic specimens of porcelain; monolithic specimens of core material; bilayered specimens with the porcelain on top (facing the loading piston during testing); bilayered specimens with core material on top. The maximum load at fracture was calculated with a biaxial flexural test and finite element analysis was used to estimate the maximum tensile stress at fracture.

Influence of core thickness on a restored crown of a first premolar using finite element analysis.

Purpose: This study examined the influence of ceramic coping thickness on the maximum stresses that arise in a first premolar all-ceramic crown.

Materials And Methods: Axisymmetric finite element models with different In-Ceram Alumina coping thicknesses (0.3, 0.

Influence of margin design and taper abutment angle on a restored crown of a first premolar using finite element analysis.

Purpose: The purpose of this study was to determine the influence of margin design and taper abutment angle on the stresses developed in all-ceramic first premolar crowns.

Materials And Methods: Four margin designs and three taper abutment angles were independently incorporated into models examined by finite element analysis. A 600-N force was applied vertically downward.

Influence of cement on a restored crown of a first premolar using finite element analysis.

Purpose: The purpose of this study was to examine the influence of the elastic modulus of cement and luting thickness on the resulting stresses in an axially loaded crown cemented onto a first premolar. A comparison of these stresses was also made with the strength of the constituent materials making up the crown.

Materials And Methods: Examination of the stresses on a restored crown was conducted using finite element analysis.