Process development for additive manufacturing of functionally graded alumina toughened zirconia components intended for medical implant application

Schwarzer, Eric; Holtzhausen, Stefan; Scheithauer, Uwe; Ortmann, Claudia; Oberbach, Thomas; Moritz, Tassilo; Michaelis, Alexander

doi:10.1016/j.jeurceramsoc.2018.09.003

Cited by 71 publications

(21 citation statements)

References 16 publications

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“…Effect of the Solid Load on the Viscosity in [ 29 ]). Such a problem was also mentioned in literature elsewhere [ 38 ]. However, too high dispersion viscosities might cause quality issues of 3D fabricated parts.…”

Section: Resultsmentioning

confidence: 82%

Ultraviolet Lithography-Based Ceramic Manufacturing (UV-LCM) of the Aluminum Nitride (AlN)-Based Photocurable Dispersions

et al. 2020

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In this work, three-dimensional (3D) shaping of aluminum nitride (AlN) UV-curable dispersions using CeraFab 7500 device equipped with the light engine emitting 365 nm wavelength (a UV-LCM device) is presented. The purpose of this study was the shaping of AlN pieces with microchannels for the future potential use as microchannel heat exchangers. The dispersions were characterized by the means of the particle size distribution, rheological measurements, and the cure depth evaluation. In shaping via UV-LCM, we applied dispersions containing 40 vol % solid load and different types of photoinitiators and their concentrations, as well as different settings of the printing parameters. Cuboidal plates with channels and cylindrical 3D structures were fabricated, debound, and sintered. For comparing ceramics properties, reference samples were prepared via uniaxial and cold isostatic pressing, using the same powder mixture as in the dispersions, and later sintered. The thermal conductivity of the sintered specimens was calculated, based on density and thermal diffusivity measurements.

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Section: Resultsmentioning

confidence: 82%

Ultraviolet Lithography-Based Ceramic Manufacturing (UV-LCM) of the Aluminum Nitride (AlN)-Based Photocurable Dispersions

et al. 2020

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“…Furthermore, the nozzle diameter is very important in bioprinting where inappropriate diameter can induce mechanical damage to the cell membrane during 3D bioprinting process. Chang et al [273] studied the effects of nozzle diameter (150, 250, 400 μm) and dispensing pressure (5,10,20, and 40 psi) of a 3D bioprinting technique on HepG2 liver cells recovery and proliferation. The results of their study showed that the mechanical damage to the cells due to increase in dispensing pressure or decrease in nozzle diameter, caused the cell viability to decrease (53.39% at 40 psi and 23.07% at 150 μm).…”

Section: D Printing Process Optimizationmentioning

confidence: 99%

“…The conventional methods to fabricate scaffolds usually do not have sufficient control on scaffold architecture (chemical composition variations, amount of porosity, pore size, shape and their network) and lead to suboptimal 3D bone scaffolds. However, 3D printing or additive manufacturing technologies are relatively new approaches which are capable of fabricating customized scaffolds with precise control on structure and with advanced materials [8][9][10][11][12]. In these manufacturing processes, the physical objects are built layerby-layer through the continuous addition of small amounts of material, based on programmed routine and a computer model.…”

mentioning

confidence: 99%

Challenges on optimization of 3D-printed bone scaffolds

Bahraminasab

2020

BioMed Eng OnLine

164

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Background Bones in human body are prone to damage due to different causes such as fractures, diseases, and infections. Nevertheless, they have a remarkable capacity to repair and heal themselves after trauma and illness. Large defects, however, are never completely reinstated because their sizes are beyond the limit up to which the bones can repair [1]. In these conditions, therefore, a medical remedy is required to stabilize, align and support the damaged bone region to restore the lost function. Bone autografts are considered the gold standard treatment. However, they have a number of shortcomings including the limited sources and donor site morbidity. Allografts also have the risk of immune rejection and disease transmission [2, 3]. Therefore, the research has headed for other solutions via tissue engineering. Bone tissue engineering provides three-dimensional (3D)

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“…Zirconia with better optical, aesthetic, mechanical and biological qualifications, is a hopeful substitute to traditional Ti implant system for oral recovery [61][62][63][64], and is produced by the oxidation of zirconium [25,27,[65][66][67]. Zirconium, which is a transition metal [56,68] with greywhite color [69][70][71][72][73], can be used to make zirconia implant. Segments of the metal implant can be uncovered by recession of gingiva and the loss of apical bone, which this can disclose a discolored overlying gingiva [74][75][76][77].…”

Section: Zirconia Implantsmentioning

confidence: 99%

Bioactive Glass Coated Zirconia for Dental Implants: a review

Zhang

2020

jcc

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Nowadays, zirconia has got extensive attention for dental implants, although it has disadvantages such as poor mechanical properties and brittleness that makes it unsuitable. On the other hand, bioactive glasses coating have been utilized on tougher substrates such as zirconia. Bioactive glass coatings can decrease the healing time and hence accelerate the formation of the bond between bone and implant. Hence in this study, we introduce the novel zirconia/bioactive glass composites with high mechanical strength and bioactivity to achieve the ideal implant dentistry. Furthermore, a review of bioactive glass coatings (i.e., 45S5 and 58S) on zirconia as well as surface modification methods (i.e., sol-gel, laser cladding, plasma spraying, etc.) is provided.

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Process development for additive manufacturing of functionally graded alumina toughened zirconia components intended for medical implant application

Cited by 71 publications

References 16 publications

Ultraviolet Lithography-Based Ceramic Manufacturing (UV-LCM) of the Aluminum Nitride (AlN)-Based Photocurable Dispersions

Ultraviolet Lithography-Based Ceramic Manufacturing (UV-LCM) of the Aluminum Nitride (AlN)-Based Photocurable Dispersions

Challenges on optimization of 3D-printed bone scaffolds

Bioactive Glass Coated Zirconia for Dental Implants: a review

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