Herstellung von Knochenimplantaten aus Titanwerkstoffen durch Laserformen

The worldwide market of metallic implants is rapidly growing. From a medical point of view Titanium is the dominating material especially for mechanically loaded implants. Despite of its good mechanical properties (from a technical perspective) and biocompatibility today´s implants reveal principle deficiencies:Joint replacing implants, such as hip implants, have to be replaced after 12-15 years due to implant lossening effects. In a majority of cases this is caused by an insufficient interconnection between the natural bone and the implant.Available standard implants do not cover a large number of individual bone defects which are likely to appear after bone cancer resection or severe trauma. In these cases complex and individual implants are required within a short period of time. Conventional manufacturing of these bone implants is always costly and time consuming.This scenario opens up the possibility to solve these problems by using generative manufacturing processes. Generative or also called rapid manufacturing processes allow flexible and time saving production of prototypes, single- and small lot series parts and have therefore reached respectable market penetration. Precondition for the development of novel implants based on a rapid technology is the capability to process titanium.This work presents the development of the DLF (Direct Laser Forming)-process to manufacture bone implants out of titanium materials. Initially the development of the mechanical system is presented to enable the processing of titanium powder materials with chemical properties corresponding to required standards. From a process technological point of view the manufacturing of hollow and lattice structures with elemental sizes < 1mm is presented for the first time. These structures form the basis for the development of novel implants with mechanically adaptable properties, for example adapted implant stiffness, to reduce implant loosening on a long term scale.Besides this aspect the development of defined periodic porosity is displayed. Hereby, the focus is also the improvement of bone ingrowth into/onto the implant. For the first time use of DLF implants for medical applications mechanical properties have to proof compliance with standards. This evidence and the improvement of mechanical properties is an essential part of this work.Finally, the results will be transfered onto various applications showing demonstrator implants with novel features.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2005

Author dc:creator

• Wirtz, Tobias Peter

Contributors dc:contributor

• Poprawe, Reinhart

• info:eu-repo/classification/ddc/610
• Medizin
• Titan
• Titanaluminide
• Implantatwerkstoff
• Implantat
• Laserbearbeitung
• Laserstrahlsintern
• Laser
• Aachen/Fraunhofer-Institut für Lasertechnik
• Knochenimplantat
• selective laser melting
• titanium
• implant
• rapid manufacturing

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-122338%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:60637