Stabilität von Pedikelschrauben - Teil 2: Maximale Auszugskräfte unter Berücksichtigung der Knochendichte
| Autor: | J. Kühle, A. V. Strempel, W. Plitz |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
musculoskeletal diseases
Orthodontics Bone mineral medicine.medical_specialty Materials science Bone disease Bone density Biomechanics equipment and supplies musculoskeletal system medicine.disease Bone cement Surgery surgical procedures operative Cadaver Screw axis medicine Orthopedics and Sports Medicine Fixation (histology) |
| Zdroj: | Zeitschrift für Orthopädie und ihre Grenzgebiete. 132:82-86 |
| ISSN: | 1438-941X 0044-3220 |
| DOI: | 10.1055/s-2008-1039824 |
| Popis: | Maximum pullout strength of pedicle screws in osteoporotic cadaver spines are tested. Bone mineral density was measured before by two noninvasive methods (QCT, DRA). Pullout direction was axial to screw axis. 210 N to 920 N were reached from D1-S1. There is a high correlation between bone mineral density and pullout strength (r = 0, 8-0.9). Augmentation of osteoporotic pedicles with bone cement increases screw stability nearly to that one of non-osteoporotic spines. |
| Databáze: | OpenAIRE |
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