Effect of sintering temperature on the aging resistance and mechanical properties of monolithic zirconia

Amat, Noor Faeizah; Muchtar, Andanastuti; Amril, Muhammad Sufiyan; Ghazali, Mariyam Jameelah; Yahaya, Norziha

doi:10.1016/j.jmrt.2018.07.017

Cited by 43 publications

(40 citation statements)

References 36 publications

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“…Results of the present study coincide with Limsamai et al [45] and Amat et al [46] who concluded that autoclave aging promoted grain pull-out in the microstructure due to t→m transformation that initiated at the surface layer of zirconia and potentially grew into the bulk of the material.…”

Section: Translucency Evaluation Was Evaluated By Calculating Contrassupporting

confidence: 91%

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

latif

El-olimy

El-Ebiary

2020

Egyptian Dental Journal

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Section: Translucency Evaluation Was Evaluated By Calculating Contrassupporting

confidence: 91%

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

latif

El-olimy

El-Ebiary

2020

Egyptian Dental Journal

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“…One peak representing the monoclinic phase of zirconia was detected by XRD on all samples. The appearance of this phase can be, on one side, attributed to the sintering of the ceramic at 1500°C, since the slightly higher temperatures could have led to an augmented grain size and minor transformation from the tetragonal to the monoclinic phase during cooling [30]. Other authors have also reported certain percentages of monoclinic zirconia, detected by XRD, on the green bodies of Alumina toughened Zirconia [31], and after sintering [32].…”

Section: Discussionmentioning

confidence: 99%

Femtosecond laser microstructuring of alumina toughened zirconia for surface functionalization of dental implants

Carvalho

Grenho

Fernandes

et al. 2020

Ceramics International

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The continuous need for high-performance implants that can withstand mechanical loads while promoting implant integration into bone has focused recent research on the surface modification of hard ceramics. Their properties of biocompatibility, high mechanical and fatigue resistance and aesthetic color have contributed to its succefull applications in dentistry. Alumina toughened Zirconia (ATZ) has been gaining attention as a material for dental implants applications due to its advanced mechanical properties and minimal degradation at body temperature. Still, in order to improve tissue response to this bioinert material, additional modifications are desirable. Improving the surface functionality of this ceramic could lead to enhanced implant-tissue interaction and subsequently, a successful implant integration. In this work, microtopographies were developed on the surface of Alumina toughened Zirconia using an ultrafast laser methodology, aiming at improving the cellular response to this ceramic. Microscale grooves and grid-like geometries were produced on ATZ ceramics by femtosecond laser ablation, with a pulse width of 150 fs, wavelength of 800 nm and repetition rate of 1 kHz. The variation of surface topography, roughness, chemistry and wettability with different laser processing parameters was examined. Cell-surface interactions were evaluated for 7 days on both microstructured surfaces and a non-treated control with pre-osteoblasts, MC3T3-E1 cells. Both surface topographies showed to improve cell response, with increased metabolic activity when compared to the untreated control and modulating cell morphology up to 7 days. The obtained results suggest that femtosecond laser texturing may be a suitable non-contact methodology for creating tunable micro-scale surface topography on ATZ ceramics to enhance the biological response.

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“… 55 After 3 months of soaking in pH 5.0 SBF, the addition of the 30% CaSi to Y-TZP caused a significant reduction in biaxial strength, while the 20% CaSi dopant maintained the strength. The material degradation may begin at the surface layer of the material and grow into the bulk of the material, 60 which in turn remarkably affects the mechanical properties.…”

Section: Discussionmentioning

confidence: 99%

Mechanical Biocompatibility, Osteogenic Activity, and Antibacterial Efficacy of Calcium Silicate–Zirconia Biocomposites

2021

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Zirconia ceramics with high mechanical properties have been used as a load-bearing implant in the dental and orthopedic surgery. However, poor bone bonding properties and high elastic modulus remain a challenge. Calcium silicate (CaSi)-based ceramic can foster osteoblast adhesion, growth, and differentiation and facilitate bone ingrowth. This study was to prepare CaSi-ZrO 2 composites and evaluate their mechanical properties, long-term stability, in vitro osteogenic activity, and antibacterial ability. The Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) bacteria and human mesenchymal stem cells (hMSCs) were used to evaluate the antibacterial and osteogenic activities of implants in vitro, respectively. Results indicated that the three-point bending strength of ZrO 2 was 486 MPa and Young’s modulus was 128 GPa, which were much higher than those of the cortical bone. In contrast, the bending strength and modulus of 20% (201 MPa and 48 GPa, respectively) and 30% CaSi (126 MPa and 20 GPa, respectively) composites were close to the reported strength and modulus of the cortical bone. As expected, higher CaSi content implants significantly enhanced cell growth, differentiation, and mineralization of hMSCs. It is interesting to note the induction ability of CaSi in osteogenic differentiation of hMSCs even when cultured in the absence of an osteogenic differentiation medium. The composite with the higher CaSi contents exhibited the greater bacteriostatic effect against E. coli and S. aureus . In conclusion, the addition of 20 wt % CaSi can effectively improve the mechanical biocompatibility, osteogenesis, and antibacterial activity of ZrO 2 ceramics, which may be a potential choice for load-bearing applications.

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Effect of sintering temperature on the aging resistance and mechanical properties of monolithic zirconia

Cited by 43 publications

References 36 publications

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

Femtosecond laser microstructuring of alumina toughened zirconia for surface functionalization of dental implants

Mechanical Biocompatibility, Osteogenic Activity, and Antibacterial Efficacy of Calcium Silicate–Zirconia Biocomposites

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