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Integration of shape memory alloy into a pedicle screw for increasing the pullout strength

: Böhm, A.; Hemmann, F.; Kunze, H.; Rotsch, C.; Scherer, S.; Senf, B.; Werner, M.

Poster urn:nbn:de:0011-n-1832198 (26 KByte PDF)
MD5 Fingerprint: 599c015d23a1999af37a3c671c549653
Erstellt am: 26.10.2011

Deutsche Gesellschaft für Biomedizinische Technik -DGBMT-; Univ. Freiburg/Brsg., Institut für Mikrosystemtechnik -IMTEK-:
BMT 2011, Biomedizinische Technik. Proceedings 45. DGBMT Jahrestagung : 27. - 30. September 2011, Freiburg
Berlin: De Gruyter, 2011 (Biomedizinische Technik 56.2011, Supplement 1)
ISSN: 0939-4990
Deutsche Gesellschaft für Biomedizinische Technik (Jahrestagung) <45, 2011, Freiburg>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IWU ()
shape memory alloy; pedicle scew; Pedikelschraube; Formgedächtnislegierung; Osteoporose; Implantat

By the increasing number of spinal fusions with posterior instrumentation and an ageing population, there will be a rising rate of revision operations. Most commonly there are used bone cement in addition to crews or screws with larger diameters. A new concept for increasing the pullout strength out of the trabecular bone structure is seen in the usage of shape memory alloys (SMA) as active elements inside the implant. Therefore a prototype of a pedicle screw with integrated nitinol sheets was developed. The pullout strength of this screw was measured with and without inserted SMA.