scholarly journals Effect of Nanoparticle Incorporation and Surface Coating on Mechanical Properties of Bone Scaffolds: A Brief Review

2016 ◽  
Vol 7 (3) ◽  
pp. 18 ◽  
Author(s):  
Jesus Corona-Gomez ◽  
Xiongbiao Chen ◽  
Qiaoqin Yang
Keyword(s):  
Mechanical Properties ◽  
Surface Coating ◽  
Bone Scaffolds

scholarly journals Additive manufacturing of PLA-based scaffolds intended for bone regeneration and strategies to improve their biological properties

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 571-599
Author(s):  
Ricardo Donate ◽  
Mario Monzón ◽  
María Elena Alemán-Domínguez
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Additive Manufacturing ◽  
Bone Regeneration ◽  
Polylactic Acid ◽  
State Of The Art ◽  
Biological Properties ◽  
Design Stage ◽  
Bone Scaffolds ◽  
Regeneration Of Bone

AbstractPolylactic acid (PLA) is one of the most commonly used materials in the biomedical sector because of its processability, mechanical properties and biocompatibility. Among the different techniques that are feasible to process this biomaterial, additive manufacturing (AM) has gained attention recently, as it provides the possibility of tuning the design of the structures. This flexibility in the design stage allows the customization of the parts in order to optimize their use in the tissue engineering field. In the recent years, the application of PLA for the manufacture of bone scaffolds has been especially relevant, since numerous studies have proven the potential of this biomaterial for bone regeneration. This review contains a description of the specific requirements in the regeneration of bone and how the state of the art have tried to address them with different strategies to develop PLA-based scaffolds by AM techniques and with improved biofunctionality.

scholarly journals Additive Manufacturing of Bone Scaffolds Using PolyJet and Stereolithography Techniques

2021 ◽  
Vol 11 (16) ◽  
pp. 7336
Author(s):  
Shummaila Rasheed ◽  
Waqas Akbar Lughmani ◽  
Muhannad Ahmed Obeidi ◽  
Dermot Brabazon ◽  
Inam Ul Ahad
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Dimensional Accuracy ◽  
Human Bone ◽  
Compression Tests ◽  
3D Scaffold ◽  
Bone Scaffolds ◽  
3D Printed ◽  
Printing Direction ◽  
Printing Techniques

In this study, the printing capability of two different additive manufacturing (3D printing) techniques, namely PolyJet and micro-stereolithography (µSLA), are investigated regarding the fabrication of bone scaffolds. The 3D-printed scaffold structures are used as supports in replacing and repairing fractured bone tissue. Printed bone scaffolds with complex structures produced using additive manufacturing technology can mimic the mechanical properties of natural human bone, providing lightweight structures with modifiable porosity levels. In this study, 3D scaffold structures are designed with different combinations of architectural parameters. The dimensional accuracy, permeability, and mechanical properties of complex 3D-printed scaffold structures are analyzed to compare the advantages and drawbacks associated with the two techniques. The fluid flow rates through the 3D-printed scaffold structures are measured and Darcy’s law is applied to calculate the experimentally measured permeability. The Kozeny–Carman equation is applied for theoretical calculation of permeability. Compression tests were performed on the printed samples to observe the effects of the printing techniques on the mechanical properties of the 3D-printed scaffold structures. The effect of the printing direction on the mechanical properties of the 3D-printed scaffold structures is also analyzed. The scaffold structures printed with the µSLA printer demonstrate higher permeability and mechanical properties as compared to those printed using the PolyJet technique. It is demonstrated that both the µSLA and PolyJet printing techniques can be used to print 3D scaffold structures with controlled porosity levels, providing permeability in a similar range to human bone.

scholarly journals FORMATION OF THE STRUCTURE AND PROPERTIES OF THE ZONE OF ALLOYING UNDER PLASMA-POWDER SURFACING OF COATS TYPE EuTroLoy 16006.04

2017 ◽  
pp. 54-57
Author(s):  
F. I. Panteleenko ◽  
V. V. Zakharenko ◽  
M. V. Spetsian
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Surface Coating ◽  
Experimental Studies ◽  
Structure And Properties

The paper presents the results of experimental studies on the surface coating of powder EuTroLoy 16006.04 with the help of plasma-powder overlaying. Analysis of the macro-structure made it possible to establish a partial absence of pores, fusions and cracks between the sub-spoon and the deposited layer. Differences in the phase composition and in the mechanical properties of the coatings were established. In places of application of plasma-powder overlaying an increase in hardness has been revealed. 

Scaffolds and Tissue Engineering Applications by 3D Bio-Printing Process

2021 ◽  
pp. 718-733
Author(s):  
Ranjit Barua ◽  
Sudipto Datta ◽  
Pallab Datta ◽  
Amit Roy Chowdhury
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Manufacturing Process ◽  
Cross Linking ◽  
Engineering Applications ◽  
Printing Process ◽  
Important Thing ◽  
Bone Scaffolds ◽  
Complex Design ◽  
Different Types

3D bio-printing is a revolutionary manufacturing process that is widely used in medical fields especially in preparing bone scaffolds and tissue engineering. With the help of new biocompatible material like polymers, bio-gels, ceramics, this technology has created a new site in advanced tissue engineering and scaffolds manufacturing area. Another important thing is that, with the use of CAD file software, any complex design can be prepared (i.e., this technology does not have any limited sites). But here it is very much essential to study and analyze machine printability characteristics, cross-linking time and biocompatibility of printing objects as well as bio-ink. However, mechanical properties like shear thinning, mechanical elasticity are also required. In this chapter, different types of scaffold-preparing methods and the bio-printing process are discussed, which are used in scaffold and tissue engineering.

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