The fixation strength of scaphoid bone screws: an in vitro investigation using polyurethane foam
| Autor: | Louise A. Crawford, Ian A. Trail, E. S. Powell |
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| Rok vydání: | 2010 |
| Předmět: |
Models
Anatomic medicine.medical_specialty Compressive Strength Bone Screws Polyurethanes Fixation (surgical) chemistry.chemical_compound Tensile Strength Medicine Humans Orthopedics and Sports Medicine Composite material Tensile testing Polyurethane Scaphoid Bone business.industry Equipment Design Compression (physics) Surgery Bone screws Compressive strength chemistry Scaphoid bone Equipment Failure business |
| Zdroj: | The Journal of hand surgery. 37(2) |
| ISSN: | 1531-6564 |
| Popis: | Purpose To compare the compression strength and pull-apart resistance of 5 single-piece scaphoid bone compression screws (Acutrak, Asnis, Herbert, Herbert-Whipple, and Little Grafter), with those of 2 dual-component screws (Kompressor and TwinFix). Methods Two blocks of polyurethane foam were compressed with a screw while held in a tension test machine, with the force measured at full insertion of the screw. The 2 blocks were then pulled apart, and the maximum resistive force was measured. Results The dual-component screws (Kompressor and TwinFix) gave greater compression force than the single-component screws, with the Kompressor screw giving statistically significantly greater compression than the TwinFix. The pull-apart resistance forces did not show such clear differences. Conclusions The Kompressor screw achieves the greatest compressive forces and has one of the highest pull-apart forces. Clinical relevance When compression and pull-apart resistance are considered, the Kompressor screw has advantages over other methods of scaphoid fixation. |
| Databáze: | OpenAIRE |
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