scholarly journals A Comprehensive Review on Bio-Nanomaterials for Medical Implants and Feasibility Studies on Fabrication of Such Implants by Additive Manufacturing Technique

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 92 ◽  
Author(s):  
Rajkumar Velu ◽  
Theo Calais ◽  
Arunkumar Jayakumar ◽  
Felix Raspall
Keyword(s):  
Additive Manufacturing ◽  
Medical Device ◽  
Feasibility Studies ◽  
Medical Implants ◽  
Implantable Medical Device ◽  
Comprehensive Review ◽  
Manufacturing Technique ◽  
Holistic Assessment ◽  
Processing Techniques ◽  
Bio Engineering

Nanomaterials have allowed significant breakthroughs in bio-engineering and medical fields. In the present paper a holistic assessment on diverse biocompatible nanocomposites are studied. Their compatibility with advanced fabrication methods such as additive manufacturing for the design of functional medical implants is also critically reviewed. The significance of nanocomposites and processing techniques is also envisaged comprehensively in regard with the needs and futures of implantable medical device industries.

The Medical Device Directives and Their Impact on the Development and Manufacturing of Medical Implants

1996 ◽  
Vol 210 (4) ◽  
pp. 233-239 ◽  
Author(s):  
S Crisp
Keyword(s):  
Medical Device ◽  
Competent Authority ◽  
Legal Framework ◽  
Third Party ◽  
Individual Member ◽  
Medical Implants ◽  
Implantable Medical Device ◽  
Post Market ◽  
Set Up ◽  
Notified Body

The introduction of a legal framework for the supply of medical implants is discussed with reference to the Active Implantable Medical Device Directive and the Medical Device Directive. The definitions of medical device and manufacturer are discussed. The application of the Directives to device/drug combinations is considered. All implants must meet certain essential requirements to ensure that they do not harm the patient, clinician or any third party. For most implants this will be indicated on the product or its packaging by CE marking involving an independent organization called a Notified Body; the latter are appointed by the Competent Authority of the Member State. Devices are classified in proportion to the risk associated with them. The steps needed to be taken by manufacturers are outlined and the verification options discussed. The role of standards and the new approach to writing them in Europe is presented. After placing a product on the market, the manufacturer must set up a system of post-market surveillance, including a vigilance procedure, in order to monitor product performance. Individual Member States can exercise the safeguard clause when a product appears to have had the CE marking incorrectly applied.

A Fluidic Vibrational Energy Harvester for Implantable Medical Device Applications

2017 ◽  
Vol 137 (6) ◽  
pp. 152-158
Author(s):  
Satoshi Inoue ◽  
Takuya Takahashi ◽  
Momoko Kumemura ◽  
Kazunori Ishibashi ◽  
Hiroyuki Fujita ◽  
...  
Keyword(s):  
Medical Device ◽  
Energy Harvester ◽  
Vibrational Energy ◽  
Implantable Medical Device ◽  
Device Applications

scholarly journals Development of Solid–Fluid Reaction Models—A Literature Review

2021 ◽  
Vol 5 (3) ◽  
pp. 36
Author(s):  
Leilei Dong ◽  
Italo Mazzarino ◽  
Alessio Alexiadis
Keyword(s):  
Process Design ◽  
Feasibility Studies ◽  
Time Frame ◽  
Physicochemical Process ◽  
Computational Time ◽  
Comprehensive Review ◽  
Multi Scale ◽  
Reaction Models ◽  
Feasible Solutions ◽  
Further Development

A comprehensive review is carried out on the models and correlations for solid/fluid reactions that result from a complex multi-scale physicochemical process. A simulation of this process with CFD requires various complicated submodels and significant computational time, which often makes it undesirable and impractical in many industrial activities requiring a quick solution within a limited time frame, such as new product/process design, feasibility studies, and the evaluation or optimization of the existing processes, etc. In these circumstances, the existing models and correlations developed in the last few decades are of significant relevance and become a useful simulation tool. However, despite the increasing research interests in this area in the last thirty years, there is no comprehensive review available. This paper is thus motivated to review the models developed so far, as well as provide the selection guidance for model and correlations for the specific application to help engineers and researchers choose the most appropriate model for feasible solutions. Therefore, this review is also of practical relevance to professionals who need to perform engineering design or simulation work. The areas needing further development in solid–fluid reaction modelling are also identified and discussed.

scholarly journals Improving surface quality in selective laser melting based tool making

2021 ◽  
Author(s):  
Filippo Simoni ◽  
Andrea Huxol ◽  
Franz-Josef Villmer
Keyword(s):  
Surface Roughness ◽  
Additive Manufacturing ◽  
Surface Quality ◽  
Selective Laser Melting ◽  
Melting Process ◽  
Laser Remelting ◽  
Laser Melting ◽  
Great Cost ◽  
Starting Point ◽  
Processing Techniques

AbstractIn the last years, Additive Manufacturing, thanks to its capability of continuous improvements in performance and cost-efficiency, was able to partly replace and redefine well-established manufacturing processes. This research is based on the idea to achieve great cost and operational benefits especially in the field of tool making for injection molding by combining traditional and additive manufacturing in one process chain. Special attention is given to the surface quality in terms of surface roughness and its optimization directly in the Selective Laser Melting process. This article presents the possibility for a remelting process of the SLM parts as a way to optimize the surfaces of the produced parts. The influence of laser remelting on the surface roughness of the parts is analyzed while varying machine parameters like laser power and scan settings. Laser remelting with optimized parameter settings considerably improves the surface quality of SLM parts and is a great starting point for further post-processing techniques, which require a low initial value of surface roughness.

scholarly journals Ultra-Wideband Flat Metamaterial GRIN Lenses Assisted with Additive Manufacturing Technique

2020 ◽  
pp. 1-1
Author(s):  
Shiyu Zhang ◽  
Ravi Kumar Arya ◽  
William G. Whittow ◽  
Darren Cadman ◽  
Raj Mittra ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Ultra Wideband ◽  
Manufacturing Technique
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