%0 Thesis
%A Bram, Martin
%T Pulvermetallurgische Herstellung von porösem Titan und von NiTi-Legierungen für biomedizinische Anwendungen
%V 171
%I Universität Bochum
%V Habilitationsschrift
%C Jülich
%M FZJ-2013-02541
%@ 978-3-89336-866-2
%B Schriften des Forschungszentrums Jülich : Energie & Umwelt / Energy & Environment
%P X, 238 p.
%D 2012
%Z Habilitationsschrift, Universität Bochum, 2013
%X In the present work, powder metallurgical processing routes were developed, which enable the net-shape manufacturing of porous titanium implants as well as NiTi implants with fully pronounced shape memory behaviour. Porous implants are attractive due to an improved fixation in the human skeleton if the bone grows into the open porosity. Furthermore, adaption of Young’s modulus reduces the risk of stress-shielding to a minimum. Implants and biomedical devices made of NiTi are well known for their unique mechanical properties, which are either based on shape memory effect or pseudoelasticity. For both class of materials, conventional  manufacturing by ingot metallurgy with subsequent hot or cold working and mechanical machining is difficult to conduct due to the fact that porosity and shape memory properties cause enhanced tool wear. In addition to a comprehensive description of the processing technologies developed in this work, basic characterisation of specific mechanical and biological properties was conducted. Results achieved were discussed considering related literature. Applicability under industrial conditions was evaluated. The potential of powder metallurgical processing of these materials was demonstrated on a couple of implant prototypes like acetabular cup, spine implant for vertebral disc replacement, dental implant and foot staple. A highlight of the work was licensing of the space holder method to Synthes Company. In 2007, Synthes launched a spine implant on market, which was manufactured with a gradient in porosity using this technology. 
%K Habilitationsschrift (GND)
%F PUB:(DE-HGF)13 ; PUB:(DE-HGF)3
%9 Habil / Postdoctoral Thesis (Non-german Habil)Book
%U https://juser.fz-juelich.de/record/134314