05/22/2018

With microstructures to better fixed implants

Very high demands are required of the surfaces of implants. For example, hip and knee endoprotheses or dental implants are fixed directly in the bone and remain in the human body for up to 15 years or longer. They are able to resist a wide variety of stress conditions. In order to achieve the best possible fixation between the implant and the natural bone tissue, a good connection between the living bone cells of the bone tissue and the implant surface must be achieved.

Surface profile analyses are used, among other methods, in the field of research into a wide variety of biocompatible materials. These provide information about microporosity and microstructure - two properties that ensure that the natural bone tissue can grow into the implant surface. This is to prevent early detachment of the implant in the bone.

Among other things, the aim is to investigate the growth behaviour and cell morphology of living bone cells on ceramic microstructures. Due to the size of the living bone cells of 20 and 150 μm, these microstructures have widths and depths between 10 μm and 300 μm in order to enable growth and specific alignment of the bone cells.

For meaningful results, the reproducibility and characterization of the microstructures play an important role. Non-destructive, contactless analysis using white light, for example, offers a very good opportunity to characterize the microstructure ceramic surface with regard to the roughness and quality of the produced microstructures.

Non-destructive surface metrology is suitable for a variety of applications in medical technology. It is always necessary when 2- and 3-dimensional surface parameters such as roughness, contour, topography or film thickness have to be determined reproducibly to the micro- and nanometer. It is often necessary to determine different characteristics of a sample in different resolutions and methods. As generally, several different measuring tools are required for this. However, multi-sensor surface measuring tools from FRT combine proven non-contact techniques such as point and surface scanning methods (chromatic, confocal and white light sensors) as well as atomic force microscopy to a universal tool.

The very high dynamic measuring range, the flexibility and expandability are the reasons that the tools are ideally suited for a variety of applications in medical technology. They measure the step height, roughness and layer thickness of coatings on blood glucose test strips as well as the contours of blood pump impellers, the curvatures of intraocular lenses and the channels of microfluidic systems.

We certainly have a solution for your specific task. Do not hesitate to contact us if you have any questions. Our experts will be glad to take care of your needs and work out individual solutions for you.