Numerical Implant Analysis

In the context of different research projects implants were numerically examined regarding their structural behaviour and interaction with the human body. First, currently used implants, e. g. a hip prosthesis, are analysed in terms of the stresses that occur during their specific application. Depending on the application, a multi-body simulation is used to determine the occurring loads resulting from specific move cases like walking, jumping or during sports. Subsequently, stresses within the implant can be analysed under consideration of different move cases. Furthermore, also residual stresses arising from the implant forming process can be considered regarding their effect on structural behaviour of the implant. Based on gained knowledge regarding the structural implant behaviour optimisation of the implant itself as well as the production process can be performed.


In recent years, implantation of hip prostheses has become a routine procedure. Despite the long experience and good clinical results, various complications occur, which have a negative impact on the life of the prosthesis. Most notably, loosening of the acetabular prosthesis and prosthesis migration due to stress-adaptive bone remodelling remain major problems. Patient-specific prostheses offer a potential solution to this problem. However, single individualised acetabular cups have so far only been used for the treatment of massive deformities or tumours. The aim of this study is to develop an innovative concept for the fabrication of patient-specific hip prostheses from titanium sheets to enable rapid customisation for the broad mass of patients.

„Design and manufacturing of a human standardised hip cup out of titanium“

B. A. Behrens, S. B. Escobar, H. Niemeier, M. Vucetic, A. Bouguecha, K. Lucas, I. Nolte, P. Wefstaedt, M. Lerch, C. Stukenborg-Colsman, A. Almohallami (2016); Materialwissenschaft und Werkstofftechnik, Volume: 47, Number: 7, pp. 608 – 622.