Influence of surface treatment of yttria-stabilized tetragonal zirconia polycrystal with hot isostatic pressing on cyclic fatigue strength

Abstract

Hot isostatic pressing processed yttria-stabilized tetragonal zirconia polycrystal (HIP Y-TZP) has the potential for application to implants due to its high mechanical performance. The aim of this study was to investigate the influence of surface treatment of HIP Y-TZP on cyclic fatigue strength. HIP Y-TZP specimens were subjected to different surface treatments. Biaxial flexural strength was determined by both static and cyclic fatigue testing. In the cyclic fatigue test, the load was applied at a frequency of 10 Hz for 10 6 cycles in distilled water at 37°C. The surface morphology, roughness, and crystal phase of the surfaces were also evaluated. The cyclic fatigue strength (888 MPa) of HIP Y-TZP with sandblasting and acid-etching was more than twice that of Y-TZP as specified in ISO 13356 for surgical implants (320 MPa), indicating the clinical potential of this material.

Effect of Thermomechanical and Static Loading on the Load to Fracture of Metal‐Ceramic, Monolithic, and Veneered Zirconia Posterior Fixed Partial Dentures

“…No differences were observed between the two types of preloading for total load to fracture of veneered zirconia groups. These findings are consistent with previous studies but inconsistent with other studies where thermomechanical loading exhibited a significant influence on the load to fracture . However, the monolithic zirconia group was clearly affected by thermomechanical loading.…”

“…Several authors have performed static load tests to study the load to fracture of ceramic materials and suggest that compressive testing is an adequate method. 1,9,27,28,31 However, other authors 3,10,12,19,[22][23][24]29,[32][33][34][35][36][37][38][39] recommend the use of artificial aging to reproduce oral environment conditions for in vitro studies of ceramic materials, as they may involve a decrease in fracture resistance. Nevertheless, fewer studies comparing static loading with some type of artificial aging have been reported, 7,19,23,24,34,35,[38][39][40] and the results are controversial.…”

Influence of grade and surface topography of commercially pure titanium on fatigue properties

“…Guilherme et al also reported that no correlation exists between surface roughness and fracture strength 33) ; however, surface treatments for ceramics often cause cracks on ceramics, which propagate internally causing mechanical strength to decrease. For yttria-stabilized tetragonal zirconia polycrystals, shot-blasted and acid-etched samples had lower fracture strengths relative to mirror polished samples 19,34) . However, crack propagation does not occur in metals because of plastic deformation caused by slip and twinning due to the existence of free electrons.…”

Effect of Physicochemical Surface Modifications on Bovine Serum Albumin Adsorption to Tetragonal Zirconia Polycrystal <i>in vitro</i> Through the change of the Zeta Potential

“…TZP is widely used in dentistry because of its sufficient strength durability for bridge framework 13,14 and recommended for its esthetic quality 15 . In addition, tooth enamel is less susceptible to wear against polished TZP than to porcelain 16 .…”