(Bio)mechanical Testing

For the research, development and testing of novel implant systems, surgical methods and minimally invasive treatments, we carry out static and dynamic (bio)mechanical tests (tensile and compression testing at various temperatures, fatigue testing), removal-torque measurements and tests with complex, multi-axial load sequences. State-of-the-art motion analyzer using video extensometers, Digital Image Correlation and 3D navigation systems are available for the detection of trajectories and deformations.

Comparison of SLM and conventionally produced implants using dynamic biomechanical loading.

 R. Schumacher, P. Lamprecht, S. Zimmermann, M. de Wild, A. Spiegel, RapidTech Erfurt, 2013.

Fatigue testing of NiTi Scaffold

T. Bormann, B. Müller, W. Hoffmann, D. Wendt, M. de Wild, Fatigue behaviour of selective-laser-melted nickel-titanium scaffolds, oral presentation, 57-4, ESB2014, 26th European Conference on Biomaterials Liverpool (United Kindom).

Optical strain fields by Scanning Electron Microscope Digital Image Correlation (SEM-DIC) while tensile testing a) a diamond, b) a single and c) a double strut micro-structure before fracturing. Scale bars indicate 2 mm.

M. Meier, F. Schuler, M. de Wild, In-situ fracture analysis of 3D-printed structures, eCM Online Periodical, 2019, Collection 4; SSB+RM Conference Abstracts (page P2) (2019).

Plastic deformation bands perpendicular to the tensile loading direction (red arrows in b) are observed in the DIC analysis of an SLM micro specimen mechanically stressed in the SEM even before surface cracks occur. Scale bars indicate 500 µm.

Biomechanical testing of meniscus

C. Rosso, S. Müller, D.M. Buckland, T. Schwenk, S. Zimmermann, M. de Wild, V. Valderrabano, All-inside Meniscal Repair Devices Compared to Their Matched Inside-Out Vertical Mattress Suture Repair: Introducing 10k and 100k Loading Cycles, Am J Sports Med. 42, 9; 2226-33 (2014).

Dynamic testing system

Removal torque testing system

Tensile testing system with temperature chamber and video laser extensometer

Publikationen

• Comparison of SLM and conventionally produced implants using dynamic biomechanical loading
  
• Marker for the pre-clinical development of bone substitute materials
  
• In-situ fracture analysis of 3D-printed structures
  

Referenzen

• C.Rosso, T. Weber, A. Dietschy, M. de Wild, S. Müller, Three anchor concepts for rotator cuff repair in standardized physiological and osteoporotic bone: a biomechanical study, J Shoulder Elbow Surg. 2019 Oct 6. pii: S1058-2746(19)30529-4. doi: 10.1016/j.jse.2019.07.032.
• S. Müller, R. Flury, S. Zimmermann, M. de Wild, L. Lafosse, V. Bongiorno, C. Rosso, Superior Tissue Grip and Biomechanical Results - introducing the New LassoLoop360° Technique, doi 10.1007/s00167-019-05604-1, Knee Surgery, Sports Traumatology, Arthroscopy (2019).
• C. Rosso, S. Müller, D.M. Buckland, T. Schwenk, S. Zimmermann, M. de Wild, V. Valderrabano, All-inside Meniscal Repair Devices Compared to Their Matched Inside-Out Vertical Mattress Suture Repair: Introducing 10k and 100k Loading Cycles, Am J Sports Med. 42, 9; 2226-33 (2014).
• J. Sailer, N. Bless, F. Dalcanale, A. Stuemer, A. Dietschy, M. de Wild, A.M. Mueller, Development of a 3D biomechanical AC-joint model, 78. Jahrestagung SGOT Swissorthopaedics - Swiss Society of Orthopaedics and Traumatology, 6.-8. Juni 2018, Montreux (Switzerland).
• M. Meier, F. Schuler, M. de Wild, In-situ fracture analysis of 3D-printed structures, eCM Online Periodical, 2019, Collection 4; SSB+RM Conference Abstracts (page P2) (2019).
• M. de Wild, S. Zimmermann, M. Obrecht, M. Dard, Marker for the pre-clinical development of bone substitute materials, Current Directions in Biomedical Engineering 3(2): 711–715 (2017).
• R. Schumacher, M. de Wild, M. Ammann, A. Spiegel: Comparison of SLM and conventionally produced implants using dynamic biomechanical loading. Abstract RapidTech 2013, Erfurt (Germany).
• A. Spiegel, M. Roellinghoff, S. Fabbri, M. de Wild, Fatigue Strength of Medartis Adaptive Distal Radius Plate, American Academy of Orthopaedic Surgeons AAOS 2009 Annual Meeting, 25.-28.02.2009, Las Vegas, NV (USA).

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