Linhardt, Oliver and Luring, Christian and Matussek, Jan and Hamberger, Corinna and Plitz, Wolfgang and Grifka, Joachim (2006) Stability of pedicle screws after kyphoplasty augmentation - An experimental study to compare tronspedicular screw fixation in soft and cured kyphoplasty cement. JOURNAL OF SPINAL DISORDERS & TECHNIQUES, 19 (2). pp. 87-91. ISSN 1536-0652,
Full text not available from this repository. (Request a copy)Abstract
Objective: The goal of this cadaver study was to compare the stability of pedicle screws after implantation in soft or cured kyphoplasty cement. Methods: Pedicle screws were inserted in a total of 30 thoracolumbar vertebrae of 10 different human specimens: 10 screws were implanted in nonaugmented vertebrae (group 1), each 10 screws were placed in Soft (group 2) and cured (group 3) cement. Pedicle screws were than evaluated for biomechanical axial pullout resistance. Results: Mean axial pullout strength was 232 N (range 60-600 N) in group 1, 452 N (range 60-1125 N) ill group 2 and 367 N (range 112-840 N) in group 3. The paired Student t-test demonstrated a significant difference between Pullout strength of groups 1 and 2 (P = 0.0300). Between pullout strength of groups 1 and 3 and between groups 2 and 3 no significant difference was seen. Conclusion: We achieved a 1.9 times higher Pullout Strength with kyphoplasty augmentation of osteoporotic vertebrae compared with the Pullout strength of nonaugmented vertebrae. Implantation of pedicle screws in cured cement is a sufficient method. With this method we found a 1.6 times higher pullout strength then in nonaugemented vertebrae.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PERCUTANEOUS VERTEBROPLASTY; INTERNAL-FIXATION; LUMBAR SPINE; BONE; POLYMETHYLMETHACRYLATE; PLACEMENT; PLATES; augmentation; kyphoplasty; mechanical stability; pedicle screw; pullout strength |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Orthopädie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Feb 2021 09:44 |
| Last Modified: | 17 Feb 2021 09:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/34754 |
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