Mechanical properties of zirconia periodic open cellular structures

Fabris, Douglas; Mesquita‐Guimarães, J.; Pinto, Paulo; Souza, Júlio C. M.; Fredel, Márcio C.; Silva, Filipe; Henriques, Bruno

doi:10.1016/j.ceramint.2019.05.010

Cited by 11 publications

(14 citation statements)

References 41 publications

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“…Bioactive ceramics composed of calcium and phosphates are the first choice as a source material for bone reconstructive scaffolds due to their bioactivity and bone-healing stimuli. However, the mechanical properties of current bioactive materials are not appropriate for repair of extensive bone defects [3,9,[11][12][13]. For instance, the compressive strength of pure hydroxyapatite porous blocks is low (~0.3 MPa) when compared to trabecular (~12 MPa) or cortical bone (~200 MPa) [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…In cases of extensive bone loss, the endosseous porous structure must possess mechanical properties to avoid fractures from occlusal stresses that could compromise the bone ingrowth process [2,3]. A balance between the desired mechanical and biological functions can be established by controlling the porosity and selection of biocompatible ceramics [7,9,13].…”

Section: Introductionmentioning

confidence: 99%

“…Zirconium dioxide is often doped with metal oxides such as yttria (Y 2 O 3 ), magnesium oxide (MgO), or calcium oxide (CaO), to stabilize tetragonal phase [33,34]. Yttria-stabilized zirconia polycrystals (Y-TZP) have an elastic modulus of 240-270 GPa, a flexural strength of 1200 MPa, a fracture toughness of 8 MPa.m 1/2 , and a high biocompatibility [13,[33][34][35]. The load-bearing capability of Y-TZP is important in maintaining bone volume and avoiding continuous tissue remodeling after placement of a porous structure.…”

Section: Introductionmentioning

confidence: 99%

“…The load-bearing capability of Y-TZP is important in maintaining bone volume and avoiding continuous tissue remodeling after placement of a porous structure. Zirconia (Y-TZP) porous structures can achieve a compressive strength ranging from 5 to 10 MPa that is crucial for clinical handling and clinical success over the period required for bone healing [7,[13][14][15]36,37]. Additionally, bioactive ceramics are used to cover the porous structures for enhanced cell stimulation while maintaining the porosity [5,7,36,38,39].…”

Section: Introductionmentioning

confidence: 99%

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Porous Zirconia Blocks for Bone Repair: An Integrative Review on Biological and Mechanical Outcomes

et al. 2022

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The aim of this study was to conduct an integrative review of the biological and mechanical outcomes of porous zirconia structures for extensive bone repair. An electronic search was performed on the PubMed database using a combination of the following scientific terms: porous, scaffold, foam, zirconia, bone regeneration, bone repair, bone healing. Articles published in the English language up to December 2021 and related to porosity, pore interconnectivity, biocompatibility and strength of the material, and the manufacturing methods of zirconia porous structures were included. Randomized controlled trials and prospective cohort studies were also evaluated. The research identified 145 studies, of which 23 were considered relevant. A high percentage of pores and the size and interconnectivity of pores are key factors for cell migration, attachment, proliferation, and differentiation. In addition, pore interconnectivity allows for the exchange of nutrients between cells and formation of blood vessels. However, a decrease in strength of the porous structures was noted with an increase in the number and size of pores. Therefore, yttria-stabilized zirconia tetragonal polycrystal (Y-TZP) has mechanical properties that make it suitable for the manufacture of highly porous structures or implants for extensive bone repair. Additionally, the porous structures can be coated with bioactive ceramics to enhance the cell response and bone ingrowth without compromising pore networking. Porous structures and mesh implants composed of zirconia have become a strategy for extensive bone repair since the material and the pore network provide the desired biological response and bone volume maintenance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Porous Zirconia Blocks for Bone Repair: An Integrative Review on Biological and Mechanical Outcomes

et al. 2022

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“…Lattices preserves the material only in necessary directions and critical zones, which can reduce the weight of the structure effectively [4]. To manufacture lattice structures, CNC milling machine can be used to make appropriate cutouts, which is limited to simple geometries and size scales [5]. In recent years, the development of Additive Manufacturing (AM) has greatly enriched the diversity of lattice structures design [6], [7] and allows to fabricate complex lattice components with uniform properties through a highly automated process [7], [9].…”

Section: Introductionmentioning

confidence: 99%

Multiscale Evaluation of The Elastic Behavior for The Metal-Coated Lattice Structures

Soleimanian

Wang

Chen

et al. 2020

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Well-developed Additive Manufacturing leads to a variety of material and structure design. With the combination of 3D printing and plating technique, metal-coated resin lattice is investigated to achieve a light weight design with minimal economic cost and admirable material properties. In this paper, numerical approaches integrated with classical homogenization theory is adopted to study the effective mechanical characterizations of the BCC (Body-Centered-Cubic) metal-coated lattices. The selection of RVE (Representative Volume Element) is discussed for obtaining objective effective properties. Moreover, the impact of unit cell rod diameter and coating film thickness are investigated. A sensitivity analysis of these two parameters is conducted based on the advanced hypercube sampling methods. The results reveal that multiple-unit-cells lead to more stable homogenized properties than single unit cell. The Increase of volume fraction may improve the elastic modulus and specific modulus remarkably. However, the increase of thickness of coating film only leads to monotonously increased elastic modulus. For this reason, there exists an optimal coating film thickness for the specific modulus of the lattice structure.

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Influence of the Addition of Ni‐Coated Carbon Nanotubes on the Mechanical Properties of Highly Porous Zirconia Cellular Structures

et al. 2021

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Herein, the effect of the addition of Ni‐coated carbon nanotubes (CNTs) on the microstructure, mechanical properties, and morphology of zirconia porous cellular structures is studied, aiming to increase their mechanical strength. Highly porous structures of monolithic zirconia (ZrO2) and zirconia reinforced with Ni‐doped CNTs (ZrO2 + CNT/Ni) are fabricated through the replica method. Scanning electron microscopy and micro‐computed tomography (microCT) analyses show that ZrO2 + CNT/Ni specimens present lower overall porosity (88.0%) than monolithic ZrO2 (93.8%), indicating improved sintering kinetics. Compressive tests for the ZrO2 + CNT/Ni samples result in a compressive strength of 0.82 ± 0.10 MPa, a threefold value of that of the monolithic sample (0.25 ± 0.07 MPa). The ZrO2 + CNT/Ni samples also present a higher elastic modulus (41.02 ± 4.94 MPa) than the ZrO2 ones (21.92 ± 5.40 MPa). Thus, the addition of Ni‐coated CNTs significantly improves the strength of highly porous zirconia cellular structures.

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Mechanical properties of zirconia periodic open cellular structures

Cited by 11 publications

References 41 publications

Porous Zirconia Blocks for Bone Repair: An Integrative Review on Biological and Mechanical Outcomes

Porous Zirconia Blocks for Bone Repair: An Integrative Review on Biological and Mechanical Outcomes

Multiscale Evaluation of The Elastic Behavior for The Metal-Coated Lattice Structures

Influence of the Addition of Ni‐Coated Carbon Nanotubes on the Mechanical Properties of Highly Porous Zirconia Cellular Structures

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