Bioinspired design of dental multilayers

Huang, Min; Wang, R.; Thompson, Van P.; Rekow, Dianne; Soboyejo, Winston O.

doi:10.1007/s10856-006-0662-0

Cited by 41 publications

(40 citation statements)

References 14 publications

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“…The bio-inspired design concept has been recently introduced to the development of new all-ceramic materials. The synthetic functionally graded material (FGM) architectures have been proved to significantly reduce stress concentration at the interface and toughen all-ceramic restorations [2][3][4][5][6][7] . The synthetic procedure involves pre-sintering zirconia core and glass infiltration.…”

Section: Introductionmentioning

confidence: 99%

Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

Qian

Cui

et al. 2016

Dent. Mater. J.

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To explore the optimal pre-sintering temperature for graded glass/zirconia material, glass/zirconia specimens were prepared and pre-sintered at 900, 1,000 and 1,100°C respectively, glass infiltration and densification at 1,450°C. Monolith Y-TZP specimens were sintered at 1,450°C. Nanoindentation was used to test Young's modulus and Hardness. Compressive strength test and cycling fatigue test were conducted. Nanoindentation test showed graded change of Young's modulus in glass/zirconia structure. The compressive strength and the number of cycles to failure of specimens pre-sintered at 1,000°C were significantly higher than those of Y-TZP and the specimens pre-sintered at 900 and 1,000°C (p<0.05). It is concluded that when the pre-sintering temperature is set at 1,000°C, the graded glass/zirconia structure exhibits the most optimal compressive strength and anti-fatigue property.

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Section: Introductionmentioning

confidence: 99%

Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

Qian

Cui

et al. 2016

Dent. Mater. J.

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“…Obtaining such level of 3D control in artificial heterogeneous composites would allow us to not only extend the lifetime of existing functional devices prone to interfacial failure but also to develop new materials for mechanically challenging demands. These include for example dental restorations for prosthetic dentistry that more closely resemble the mechanical properties of natural tooth 23 , elastomeric substrates for flexible electronics that are bendable and stretchable but yet locally stiff [24][25][26][27][28][29] and synthetic bioscaffolds for the replacement of intervertebral discs 30 and for the regeneration of graded tendon/ligament-to-bone insertions [31][32][33] . In addition to addressing such mechanical challenges, the deliberate local reinforcement of weak regions achievable with such heterogeneous composites also represents an economical and environmental-friendly approach to attain the required mechanical performance while minimizing the use of limited and costly resources.…”

mentioning

confidence: 99%

Stretchable heterogeneous composites with extreme mechanical gradients

et al. 2012

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Heterogeneous composite materials with variable local stiffness are widespread in nature, but are far less explored in engineering structural applications. The development of heterogeneous synthetic composites with locally tuned elastic properties would allow us to extend the lifetime of functional devices with mechanically incompatible interfaces, and to create new enabling materials for applications ranging from flexible electronics to regenerative medicine. Here we show that heterogeneous composites with local elastic moduli tunable over five orders of magnitude can be prepared through the site-specific reinforcement of an entangled elastomeric matrix at progressively larger length scales. Using such a hierarchical reinforcement approach, we designed and produced composites exhibiting regions with extreme soft-to-hard transitions, while still being reversibly stretchable up to 350%. The implementation of the proposed methodology in a mechanically challenging application is illustrated here with the development of locally stiff and globally stretchable substrates for flexible electronics.

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“…Within this functionally graded layer, stress concentration is significantly reduced by virtue of the gradually changing elastic modulus [6][7][8][9] . Inspired by DEJ, some researchers introduced the concept of a bio-inspired, functionally graded material layer structure between the ceramic core and cement to reduce stress [10][11][12][13][14][15] . Huang et al 10) developed a two-dimensional all-ceramic restoration model with a bio-inspired functionally graded material (FGM) layer between the ceramic core and cement.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, the bio-inspired design concept was introduced to the research field of all-ceramic restorations. Previous studies had shown that synthetic DEJ-like joints with functionally graded material (FGM) architectures could significantly reduce stress concentration at the interface and toughen all-ceramic restorations [10][11][12][13][14][15] . However, the explicit optimal design of functionally graded material layer (variation of gradients in elastic modulus in FGM) between the ceramic core and cement remained to be proposed.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the design of bio-inspired functionally graded material (FGM) layer in all-ceramic dental restorations

Cui

Sun

2014

Dent. Mater. J.

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Due to elastic modulus mismatch between the different layers in all-ceramic dental restorations, high tensile stress concentrates at the interface between the ceramic core and cement. In natural tooth structure, stress concentration is reduced by the functionally graded structure of dentin-enamel junction (DEJ) which interconnects enamel and dentin. Inspired by DEJ, the aim of this study was to explore the optimum design of a bio-inspired functionally graded material (FGM) layer in all-ceramic dental restorations to achieve excellent stress reduction and distribution. Three-dimensional finite element model of a multi-layer structure was developed, which comprised bilayered ceramic, bio-inspired FGM layer, cement, and dentin. Finite element method and first-order optimization technique were used to realize the optimal bio-inspired FGM layer design. The bio-inspired FGM layer significantly reduced stress concentration at the interface between the crown and cement, and stresses were evenly distributed in FGM layer. With the optimal design, an elastic modulus distribution similar to that in DEJ occurred in the FGM layer.

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Bioinspired design of dental multilayers

Cited by 41 publications

References 14 publications

Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

Stretchable heterogeneous composites with extreme mechanical gradients

Optimizing the design of bio-inspired functionally graded material (FGM) layer in all-ceramic dental restorations

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