Novel materials for high-resolution three-dimensional printing using surface-selective laser sintering

The three-dimensional printing of scaffolds is an interesting alternative to the traditional techniques of periodontal regeneration. This technique uses computer assisted design and manufacturing after CT scan. After 3D modelling, individualized scaffolds are printed by extrusion, selective laser sintering, stereolithography, or powder bed inkjet printing. These scaffolds can be made of one or several materials such as natural polymers, synthetic polymers, or bioceramics. They can be monophasic or multiphasic and tend to recreate the architectural structure of the periodontal tissue. In order to enhance the bioactivity and have a higher regeneration, the scaffolds can be embedded with stem cells and/or growth factors. This new technique could enhance a complete periodontal regeneration. This review summarizes the application of 3D printed scaffolds in periodontal regeneration. The process, the materials and designs, the key advantages and prospects of 3D bioprinting are highlighted, providing new ideas for tissue regeneration.

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Rapid Prototyping: Technologies, Materials and Advances

Archives of Metallurgy and Materials ◽

10.1515/amm-2016-0151 ◽

2016 ◽

Vol 61 (2) ◽

pp. 891-896 ◽

Cited By ~ 1

Author(s):

P. Dudek ◽

A. Rapacz-Kmita

Keyword(s):

Rapid Prototyping ◽

Selective Laser Sintering ◽

Three Dimensional ◽

Digital Data ◽

Fused Deposition Modelling ◽

Three Dimensional Printing ◽

Fused Deposition ◽

Composite Fabrication ◽

Materials Used ◽

Dimensional Printing

AbstractIn the context of product development, the term rapid prototyping (RP) is widely used to describe technologies which create physical prototypes directly from digital data. Recently, this technology has become one of the fastest-growing methods of manufacturing parts. The paper provides brief notes on the creation of composites using RP methods, such as stereolithography, selective laser sintering or melting, laminated object modelling, fused deposition modelling or three-dimensional printing. The emphasis of this work is on the methodology of composite fabrication and the variety of materials used in these technologies.

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Strengthening Porous Skeletons by Metal Deposition from a Nanoparticle Suspension

MRS Proceedings ◽

10.1557/proc-860-ll3.3 ◽

2004 ◽

Vol 860 ◽

Cited By ~ 1

Author(s):

Nathan B. Crane ◽

Emanuel M. Sachs ◽

Andreas Frank

Keyword(s):

Solid Freeform Fabrication ◽

Selective Laser Sintering ◽

Three Dimensional ◽

Nanoparticle Suspension ◽

Three Dimensional Printing ◽

Freeform Fabrication ◽

Porous Bodies ◽

Infiltration Temperature ◽

Dimensional Printing ◽

Infiltration Techniques

ABSTRACTSolid freeform fabrication (SFF) processes such as three-dimensional printing (3DP) and selective laser sintering (SLS) produce porous bodies that must be densified for many applications. New homogenous infiltration techniques can produce dense, homogenous parts of selected standard alloys, but the increased infiltration temperature dramatically increases creep deflection under self-weight. This paper reports on a method that improves dimensional stability by reducing creep deflection rates at high temperature. This method is applicable to all metal skeletons that must be strengthened without increasing shrinkage. In this method, the skeletons are reinforced by the addition of nanometer-sized particles dispersed in a liquid. The liquid is applied to the structure either during 3DP printing or after forming (3DP, SLS, pressing). The liquid is then evaporated, depositing the metal in the skeleton. The metal nanoparticles are sintered to density below the sintering temperature of the micron-scale skeleton particles. This concept is demonstrated using a suspension of 8–10 nm iron particles infiltrated into lightly sintered porous steel skeletons. When heated with an unsupported overhang to a typical infiltration temperature, creep deflection was reduced 50–80% with 0.5–1 wt% added metal.

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Topology optimization and 3D printing of multimaterial magnetic actuators and displays

Science Advances ◽

10.1126/sciadv.aaw1160 ◽

2019 ◽

Vol 5 (7) ◽

pp. eaaw1160 ◽

Cited By ~ 10

Author(s):

Subramanian Sundaram ◽

Melina Skouras ◽

David S. Kim ◽

Louise van den Heuvel ◽

Wojciech Matusik

Keyword(s):

Topology Optimization ◽

High Resolution ◽

Three Dimensional ◽

Design Synthesis ◽

Magnetic Actuators ◽

Three Dimensional Printing ◽

Drop On Demand ◽

Tightly Coupled ◽

Actuation Systems ◽

Dimensional Printing

Upcoming actuation systems will be required to perform multiple tightly coupled functions analogous to their natural counterparts; e.g., the ability to control displacements and high-resolution appearance simultaneously is necessary for mimicking the camouflage seen in cuttlefish. Creating integrated actuation systems is challenging owing to the combined complexity of generating high-dimensional designs and developing multifunctional materials and their associated fabrication processes. Here, we present a complete toolkit consisting of multiobjective topology optimization (for design synthesis) and multimaterial drop-on-demand three-dimensional printing for fabricating complex actuators (>106 design dimensions). The actuators consist of soft and rigid polymers and a magnetic nanoparticle/polymer composite that responds to a magnetic field. The topology optimizer assigns materials for individual voxels (volume elements) while simultaneously optimizing for physical deflection and high-resolution appearance. Unifying a topology optimization-based design strategy with a multimaterial fabrication process enables the creation of complex actuators and provides a promising route toward automated, goal-driven fabrication.

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