Biomechanical Testing of Bioabsorbable Cannulated Screws for Slipped Capital Femoral Epiphysis Fixation
| Autor: | Jeffrey C. Lotz, Moira R. Heilmann, Andrew Haskell, David Rovinsky, Norman Y. Otsuka, Markus W. Kroeber |
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| Rok vydání: | 2002 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty Compressive Strength Polymers Bone Screws chemistry.chemical_element Biomechanical testing Catheterization Absorbable Implants Shear stress Humans Medicine Orthopedics and Sports Medicine Lactic Acid Fixation (histology) Titanium Orthodontics business.industry Biomechanics musculoskeletal system equipment and supplies Compression (physics) medicine.disease Surgery chemistry Steel Epiphysiolysis Stress Mechanical Shear Strength business Slipped capital femoral epiphysis Epiphyses Femoral Fractures |
| Zdroj: | Orthopedics. 25:659-663 |
| ISSN: | 1938-2367 0147-7447 |
| DOI: | 10.3928/0147-7447-20020601-16 |
| Popis: | This study compared cannulated 4.5-mm bioabsorbable screws made of self-reinforced poly-levolactic acid to cannulated 4.5-mm steel and titanium screws for resistance to shear stress and ability to generate compression in a polyurethane foam model of slipped capital femoral epiphysis fixation. The maximum shear stress resisted by the three screw types was similar (self-reinforced poly-levolactic acid 371 ±146 MPa, steel 442±43 MPa, and titanium 470±91 MPa). The maximum compression generated by both the self-reinforced poly-levolactic acid screw (68.5±3.3 N) and the steel screw (63.3±5.9 N) was greater than that for the titanium screw (3±1.4 N, P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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