Trends and perspectives in modification of zirconium oxide for a dental prosthetic applications – A review

Nakonieczny, Damian S.; Ziębowicz, A.; Paszenda, Z.; Krawczyk, C.

doi:10.1016/j.bbe.2016.10.005

Cited by 33 publications

(21 citation statements)

References 117 publications

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“…However, LS 2 cytotoxicity remains unclear according to the conditions of the study. Some publications have reported the cytotoxicity of this material [24,61], and there is no clear consensus when comparing lithium disilicate and zirconia. A key factor could be the type of cells seeded on the surfaces.…”

Section: Discussionmentioning

confidence: 99%

Biocompatibility of Polymer and Ceramic CAD/CAM Materials with Human Gingival Fibroblasts (HGFs)

et al. 2019

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Four polymer and ceramic computer-aided design/computer-aided manufacturing (CAD/CAM) materials from different manufacturers (VITA CAD-Temp (polymethyl methacrylate, PMMA), Celtra Duo (zirconia-reinforced lithium silicate ceramic, ZLS), IPS e.max CAD (lithium disilicate (LS2)), and VITA YZ (yttrium-tetragonal zirconia polycrystal, Y-TZP)) were tested to evaluate the cytotoxic effects and collagen type I secretions on human gingival fibroblasts (HGFs). A total of 160 disc-shaped samples (Ø: 10 ± 2 mm; h: 2 mm) were milled from commercial blanks and blocks. Direct-contact cytotoxicity assays were evaluated at 24, 48, and 72 h, and collagen type I (COL1) secretions were analysed by cell-based ELISA at 24 and 72 h. Both experiments revealed statistically significant differences (p < 0.05). At 24 and 48 h of contact, cytotoxic potential was observed for all materials. Later, at 72 h, all groups reached biologically acceptable levels. LS2 showed the best results regarding cell viability and collagen secretion in all of the time evaluations, while Y-TZP and ZLS revealed intermediate results, and PMMA exhibited the lowest values in both experiments. At 72 h, all groups showed sharp decreases in COL1 secretion regarding the 24-h values. According to the results obtained and the limitations of the present in vitro study, it may be concluded that the ceramic materials revealed a better cell response than the polymers. Nevertheless, further studies are needed to consolidate these findings and thus extrapolate the results into clinical practice.

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Section: Discussionmentioning

confidence: 99%

Biocompatibility of Polymer and Ceramic CAD/CAM Materials with Human Gingival Fibroblasts (HGFs)

et al. 2019

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“…In the biomedical field, the fiber‐reinforced resin matrix composite (FRC) is a new repair materials, this kind of composites is made of fiber and high‐strength resin . Fiber have a high strength and high elastic modulus characteristics, it is dispersed in the resin matrix as a reinforcing structure, to improve the strength and toughness of the resin .…”

Section: Introductionmentioning

confidence: 99%

The mechanical and tribological behaviors of PI composite filled with plasma treated UHMWPE fiber

Niu

Chang

2017

Surf Interface Anal

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The friction and wear behaviors of ultra-high molecular weight polyethylene (UHMWPE)/PI composite were investigated in a ring-on-block wear tester. Ti6Al4V alloy ring were selected as the counterbody in this study. It was found that the detachment of particles, ripples, and ploughs were observed under higher load. Plasma treatment efficiently improves the interfacial adhesion of UHMWPE/PI composite. Both the friction coefficient and wear increased with load, and the plasma treated one shows lower friction coefficient and wear.

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“…The transition from single-phase to heterophase ceramics also introduces the possibility of the formation of interphase boundaries and dopant-stabilizing metastable phases. The mechanism of stabilization of metastable phases is not yet clear; however, the following trends were reported for the most extensively studied ZrO 2 -based models [ 45 ]: The decrease of grain size of metastable β-ZrO 2 below 300 nm stabilized the phase and inhibited its spontaneous martensitic transformation and low-temperature degradation; The stability of β-ZrO 2 showed a linear dependence on the concentration of stabilizing agents; The highest stability of β-ZrO 2 was achieved by mixing trivalent and pentavalent stabilizers; Inhomogeneous distribution of stabilizer particles increased the susceptibility of β-ZrO 2 to martensitic transformation; Slow cooling and isothermal dwelling during the heating-cooling cycles promoted the nucleation and growth of the thermodynamically stable α-ZrO 2 phase; Dopant cations with radii smaller than Zr 4+ reduced the lattice parameters, destabilized the fluorite structure, and promoted the formation of vacancies on non-metallic sublattice. As a result, the diffusion coefficients increased, lowering the ceramic solidification temperature and shortening the time of sintering, which allowed for the production of ceramics with a relative density close to one and enhanced mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…The Ta-Si-C system is particularly interesting in this regard because it features a reversible phase reaction resulting in the formation of silicon-based melt [14]. Sintering techniques involving a transient liquid phase are widely used in ceramic manufacturing [45]; therefore, the investigation of the influence of SiC nanowires on the melt formation and overall sintering mechanisms in heterogeneous non-oxide compositions is both scientifically novel and practically applicable. The understanding and control of sintering behavior are pivotal for the engineering of ceramics with desirable properties [23,[31][32][33]46].…”

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confidence: 99%

Effect of In Situ Grown SiC Nanowires on the Pressureless Sintering of Heterophase Ceramics TaSi2-TaC-SiC

et al. 2020

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To ascertain the influence of SiC nanowires on sintering kinetics of heterophase ceramics, two composite powders (TaSi2-TaC-SiC and TaSi2-TaC-SiC-SiCnanowire) are fabricated by mechanically activated combustion synthesis of Ta-Si-C and Ta-Si-C-(C2F4) reactive mixtures. Remarkable compressibility is achieved for the TaSi2-TaC-SiC-SiCnanowire composition (green density up to 84% as compared with 45.2% achieved for TaSi2-SiC-TaC) which is attributed to the lubricating effect of residual adsorbed fluorinated carbon (most likely C4F8). The outcomes of pressureless sintering of TaSi2-TaC-SiC and TaSi2-TaC-SiC-SiCnanowire compositions are vastly different; the former experiences no significant densification or grain growth and does not attain structural integrity, whereas the latter achieves relative density up to 93% and hardness up to 11 GPa. The SiC nanowires are not retained in consolidated ceramics, but instead, act as a sintering aid and promote densification and grain growth. Sintering mechanisms of TaSi2-TaC-SiC and TaSi2-TaC-SiC-SiCnanowire powders are analyzed using thermodynamic and ab initio grand potential calculations, as well as the analysis of grain size versus relative density relations. In the case of solid-state sintering, the densification and grain growth in heterophase non-oxide ceramics are governed by the same mechanisms as previously investigated single-phase oxides. The presence of SiC nanowires enhances grain-boundary related diffusion processes due to the high specific surface and aspect ratio of the nanowires. At 1500 °C, where the formation of the transient Si-based liquid phase is thermodynamically viable, only the SiC nanowire-containing composition demonstrated the intense grain coarsening and densification associated with liquid-assisted sintering. This effect can be attributed both to the presence of SiC nanowires and purification of residual oxide impurities due to C2F4-activated combustion synthesis employed for the in situ formation of SiC nanowires.

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Trends and perspectives in modification of zirconium oxide for a dental prosthetic applications – A review

Cited by 33 publications

References 117 publications

Biocompatibility of Polymer and Ceramic CAD/CAM Materials with Human Gingival Fibroblasts (HGFs)

Biocompatibility of Polymer and Ceramic CAD/CAM Materials with Human Gingival Fibroblasts (HGFs)

The mechanical and tribological behaviors of PI composite filled with plasma treated UHMWPE fiber

Effect of In Situ Grown SiC Nanowires on the Pressureless Sintering of Heterophase Ceramics TaSi2-TaC-SiC

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