@article{41906,
abstract = {{Abstract
Background
Due to the steadily increasing life expectancy of the population, the need for medical aids to maintain the previous quality of life is growing. The basis for independent mobility is a functional locomotor system. The hip joint can be so badly damaged by everyday wear or accelerated by illness that reconstruction by means of endoprostheses is necessary.
Results
In order to ensure a high quality of life for the patient after this procedure as well as a long service life of the prosthesis, a high-quality design is required, so that many different aspects have to be taken into account when developing prostheses. Long-term medical studies show that the service life and operational safety of a hip prosthesis by best possible adaptation of the stiffness to that of the bone can be increased. The use of additive manufacturing processes enables to specifically change the stiffness of implant structures.
Conclusions
Reduced implant stiffness leads to an increase in stress in the surrounding bone and thus to a reduction in bone resorption. Numerical methods are used to demonstrate this fact in the hip implant developed. The safety of use is nevertheless ensured by evaluating and taking into account the stresses that occur for critical load cases. These results are a promising basis to enable longer service life of prostheses in the future.
}},
author = {{Risse, Lena and Woodcock, Steven Clifford and Brüggemann, Jan-Peter and Kullmer, Gunter and Richard, Hans Albert}},
issn = {{1475-925X}},
journal = {{BioMedical Engineering OnLine}},
keywords = {{Radiology, Nuclear Medicine and imaging, Biomedical Engineering, General Medicine, Biomaterials, Radiological and Ultrasound Technology}},
number = {{1}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Stiffness optimization and reliable design of a hip implant by using the potential of additive manufacturing processes}}},
doi = {{10.1186/s12938-022-00990-z}},
volume = {{21}},
year = {{2022}},
}
@article{25142,
abstract = {{Additive Manufacturing provides the opportunity to produce tailored and complex structures economically. The use of lattice structures in combination with a thermoplastic elastomer enables the generation of structures with configurable properties by varying the cell parameters. Since there is only little knowledge about the producibility of lattice structures made of TPE in the laser sintering process and the resulting mechanical properties, different kinds of lattice structures are investigated within this work. The cell type, cell size and strut thickness of these structures are varied and analyzed. Within the experimental characterization of Dodecahedron-cell static and cyclic compression tests of sandwich structures are focused. The material exhibits hyperelastic and plastic properties and also the Mullins-Effect. For the later design of real TPE structures, the use of numerical methods helps to reduce time and costs. The preceding experimental investigations are used to develop a concept for the numerical modeling of TPE lattice structures.}},
author = {{Kummert, Christina and Schmid, Hans-Joachim and Risse, Lena and Kullmer, Gunter}},
issn = {{0884-2914}},
journal = {{Journal of Materials Research}},
title = {{{Mechanical characterization and numerical modeling of laser-sintered TPE lattice structures}}},
doi = {{10.1557/s43578-021-00321-3}},
year = {{2021}},
}
@article{41909,
abstract = {{The continuous development of medical methods in recent decades has achieved measurable improvement. The interdisciplinary cooperation of engineers and physicians is a forward-looking component of this development. However, this cooperation also results in new interfaces on the communication and software level, which must be defined by implementing a systematic workflow. In this paper, the step-by-step implementation of engineering methods into the surgical workflow is shown. The focus is on the basic requirements and the necessary exchange of information. Additively manufactured models for preoperative elucidation of the patient are used as a psychological added value to increase the transparency of the surgical procedure. In addition, the models serve to train young surgeons and provide the opportunity to plan advanced surgical techniques.}},
author = {{Risse, Lena and Kullmer, Gunter}},
issn = {{2059-4755}},
journal = {{Journal of 3D Printing in Medicine}},
keywords = {{General Medicine}},
number = {{2}},
pages = {{111--121}},
publisher = {{Future Medicine Ltd}},
title = {{{Application of engineering methods in the planning process of surgical treatments}}},
doi = {{10.2217/3dp-2020-0020}},
volume = {{5}},
year = {{2021}},
}
@article{24005,
author = {{Brüggemann, Jan-Peter and Risse, Lena and Woodcock, Steven Clifford and Joy, Tintu David and Neumann, Johannes and Vidner, Jakub and Kullmer, Gunter and Richard, Hans Albert}},
issn = {{2666-4968}},
journal = {{Applications in Engineering Science}},
title = {{{Structural optimization of a wheel force transducer component for more realistic acquisition of vehicle load data and fracture mechanical evaluation}}},
doi = {{10.1016/j.apples.2020.100032}},
year = {{2020}},
}
@inproceedings{24011,
author = {{Joy, Tintu David and Kullmer, Gunter and Risse, Lena}},
location = {{Hamburg}},
pages = {{207--216}},
title = {{{Vorhersage der Rissinitiierung in 3D-Strukturen mit ADAPCRACK3D}}},
volume = {{DVM-Bericht 252}},
year = {{2020}},
}
@phdthesis{24014,
author = {{Risse, Lena}},
publisher = {{Shaker Verlag}},
title = {{{Präoperative Studien zur Gestaltung von patientenspezifischen, medizinischen Hilfsmitteln}}},
volume = {{Band 21}},
year = {{2020}},
}