Linhardt, O. and Lüring, C. and Matussek, J. and Hamberger, C. and Herold, T. and Plitz, W. and Grifka, J. (2006) Stability of anterior vertebral body screws after kyphoplasty augmentation : An experimental study to compare anterior vertebral body screw fixation in soft and cured kyphoplasty cement. International orthopaedics 30 (5), pp. 366-370.
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Other URL: http://dx.doi.org/10.1007/s00264-006-0100-4
The goal of this cadaver study was to compare the stability of anterior vertebral body screws after implantation in soft or cured kyphoplasty cement. Anterior vertebral body screws were inserted in a total of 30 thoracolumbar vertebrae of ten different human specimens: ten screws were implanted in non-augmented vertebrae (group 1), ten screws were placed in soft cement (group 2), and ten screws were placed in cured cement (group 3). The screws were then tested for biomechanical axial pullout resistance. Mean axial pullout strength was 192 N (range: 10-430 N) in group 1, 364 N (range: 65-875 N) in group 2, and 271 N (range: 35-625 N) in group 3. The paired Student's t-test demonstrated a significant difference between pullout strength of groups 1 and 2 (p= 0.0475). No significant difference was seen between pullout strength of groups 1 and 3 (p= 0.2646) and between groups 2 and 3 (p= 0.3863). We achieved a 1.9 times higher pullout strength with kyphoplasty augmentation of osteoporotic vertebrae compared with the pullout strength of non-augmented vertebrae. Implantation of anterior vertebral body screws in cured cement is a satisfactory method. With this method we found a 1.4 times higher pullout strength than non-augmented vertebrae.
|Institutions:||Medicine > Lehrstuhl für Röntgendiagnostik|
|Subjects:||600 Technology > 610 Medical sciences Medicine|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||05 Mar 2007|
|Last Modified:||20 Jul 2011 20:52|