Reliable implants

Polymer Tribology and Biomedical Materials

We develop mechanical tests with which to assess the reliability and service life of orthopedic and dental materials and implants in order to determine, for instance, strength, material fatigue or wear.

Furthermore we develop simulation techniques and use these for bionics, biomimetics or fluid dynamics. We investigate osteosynthesis plates, dental implants, dental fillings and bone cement for our partners from the fields of medical technology and the health care system.

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Topics 


Services

Evaluation of quasi-static strength and implant fatigue behavior (dental implants, osteosynthesis plates, ceramic hip joint components, resorbable implants, etc.).

Bone cements: fatigue behaviour, creep and build-up of internal stresses during curing

Mechanical performance of dental materials (polymerization shrinkage, build up of internal stresses during curing, mechanical strength, creep behavior, abrasion - resistance, response to polishing treatments, etc.).

Experiments and simulations on the mechanical properties of electrostatically spun scaffolds.

Investigations into dimensional accuracy and reliability of generatively manufactured components.

Assessing models for the life-time of ceramic implants and other components.

Performance of surgical instruments.

Preventative failure detection of polymeric materials using microcapsules which release fragrances when ruptured.

Topics

 

Reliability and operational behavior of biomedical materials and implants


Hip joint prostheses, bone cements and dental implants in patients must survive several million load cycles without failure due to fatigue. Bone cement should have no critical creep deformation under load. The mechanical properties of resorbable osteosynthesis plates should change during the removal process in a defined way. A micro bone screw should quickly and definitely “grip” when screwed into ...

 

Reliability in generative manufacturing


Generative production processes are becoming more important in the production of small series, customized components and the manufacture of complex component structures. The transition from rapid prototyping to rapid manufacturing requires that produced parts be subjected to reliable and defined quality control. To do this, we experimentally and computationally define the internal stresses and shape distortions that arise from the layered structure...

 

Tribology of “soft matter”: Hydrogels, elastomers and thermoplastics


The tribology of “soft matter” is characterized by the complex dependence of the friction value and wear on normal force, speed, temperature, lubricants and surface finish of the friction bodies.  The range of experimental observations can be mapped using appropriate models of friction mechanisms. An understanding of tribological phenomena allows adequate measures to be taken to minimize friction ...

 

Publications regarding Polymer Tribology and Biomedical Materials


Contributions to newspapers, books and conferences as well as dissertations and project reports...