Thermo and mechanical cycling and veneering method do not influence Y-TZP core/veneer interface bond strength
Related Experiment Video
Updated: May 16, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Hugo Alberto Vidotti1, Jefferson Ricardo Pereira, Elizeu Insaurralde
1Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil. hvidotti@yahoo.com.br
Objectives:
The purpose of this study was to evaluate the influence of thermal and mechanical cycling and veneering technique on the shear bond strength of Y-TZP (yttrium oxide partially stabilized tetragonal zirconia polycrystal) core-veneer interfaces.
Materials And Methods:
Cylindrical Y-TZP specimens were veneered either by layering (n=20) or by pressing technique (n=20). A metal ceramic group (CoCr) was used as control (n=20). Ten specimens for each group were thermal and mechanical cycled and then all samples were subjected to shear bond strength in a universal testing machine with a 0.5mm/min crosshead speed. Mean shear bond strength (MPa) was analysed with a 2-way analysis of variance and Tukey's test (p<0.05). Failure mode was determined using stereomicroscopy and scanning electron microscopy (SEM).
Results:
Thermal and mechanical cycling had no influence on the shear bond strength for all groups. The CoCr group presented the highest bond strength value (p<0.05) (34.72 ± 7.05 MPa). There was no significant difference between Y-TZP veneered by layering (22.46 ± 2.08 MPa) or pressing (23.58 ± 2.1 MPa) technique. Failure modes were predominantly adhesive for CoCr group, and cohesive within veneer for Y-TZP groups.
Conclusions:
Thermal and mechanical cycling, as well as the veneering technique does not affect Y-TZP core-veneer bond strength.
Clinical Significance:
Different methods of veneering Y-TZP restorations would not influence the clinical performance of the core/veneer interfaces.
Related Concept Videos
Veneer
Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...
Bonding and Strength of Aggregate
Thermal Stress
Accelerated Curing of Concrete
Thermal Strain
Thermal expansion and Thermal stress: Problem Solving
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.
