Whether for individual micro-implants or for micro-implants with medicine depots – additive processes are ideally suited for manufacturing such components. In the project “REMEDIS”, scientists at the Laser Zentrum Hannover e.V. (LZH) have established a highly automated laser melting process to produce or coat implants made of platinum, nickel-titanium (NiTi) or stainless steel.
For this, scientists of the Surface Technology Group used a special form of 3-D printing – selective laser micro-melting (SLµM).
They were able to coat electrodes for pacemakers with platinum, and produce three-dimensional lattice structures made of NiTi as well as stent prototypes made of stainless steel. Within this project platinum has been – for the first time successfully – processed within micro scale.
Coated pacemaker electrodes
One way to lengthen the life of pacemakers is to intelligently adapt the form and surface of the electrodes. Platinum has excellent electrical conductivity characteristics, and it is bioinert. However, the metal has casting limitations, and it is hard to be worked on in the micro-range using conventional methods.
In the framework of this project, the scientists have developed an SLµM process for a platinum-iridium-alloy, and successfully coated implants.
Lattice structures made of shape memory alloys
The shape memory alloy NiTi is already widely used in medical technology. Micro-implants made of NiTi offer new possibilities for making tailor-made stents, or bone replacements for patients.
The scientists at the LZH have been able to successfully manufacture highly-complex, three-dimensional component structures made of NiTi. A resolution of up to 90 µm has already been reached for components, retaining all of the characteristics of the shape memory alloy.
Stent structures made of stainless steel
The use of stainless steel 316 L for SLµM processes has already been established. Within this project, stent structures with a closed cell design have been developed and produced. Their mechanical characteristics are similar to those of conventional stents.
The project was carried out together with the Institute for Biomedical Technology of the University of Rostock, as a subproject in the cooperative project “REMEDIS”. REMEDIS was supported by the German Federal Ministry for Education and Research (BMBF).
Lena Bennefeld | Laser Zentrum Hannover e.V.
New imaging technique able to watch molecular dynamics of neurodegenerative diseases
14.07.2017 | The Optical Society
Quick test finds signs of sepsis in a single drop of blood
03.07.2017 | University of Illinois at Urbana-Champaign
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Materials Sciences
27.07.2017 | Life Sciences
27.07.2017 | Power and Electrical Engineering