Evaluation of a Fiber Reinforced Drillable Bone Cement for Screw Augmentation in a Sheep Model—Mechanical Testing
| Autor: | Benjamin J. Ahern, Elliott A. Gruskin, Thomas P. Schaer, Robert D. Harten |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty Materials science Time Factors medicine.medical_treatment Long bone Bone Screws Osteotomy General Biochemistry Genetics and Molecular Biology Materials Testing medicine Cadaver Animals Orthopedic Procedures Fiber Tibia General Pharmacology Toxicology and Pharmaceutics Research Articles Cement Sheep General Neuroscience Bone Cements General Medicine Bone cement Compression (physics) equipment and supplies Surgery Biomechanical Phenomena medicine.anatomical_structure Models Animal Female Cadaveric spasm Biomedical engineering |
| Popis: | We evaluated the mechanical properties of a novel fiber reinforced calcium phosphate at time zero and after 12 weeks in vivo using a sheep long bone osteotomy model. Time zero data were obtained and compared by pullout testing of 4.5 mm bone screws from bone proper and overdrilled defects of 4.5 and 8 mm diameter. Defects were augmented with: polymethylmethacrylate (PMMA), calcium phosphate, and fiber reinforced calcium phosphate using cadaveric sheep tibiae. Twelve‐week data were obtained from explanted tibiae of sheep that underwent unilateral tibial osteotomy surgery repaired with a locking compression plate. The most distal hole was overdrilled to 4.5 or 8 mm diameter, filled with fiber reinforced cement, drilled, tapped and a 4.5 mm screw was placed. Screw holding strength at t= 0 was significantly higher for reinforced when compared to nonreinforced cement, but not different from bone or PMMA in 4.5 mm defects. There was no difference in pullout strength for the 8 mm defect data. After 12 weeks fiber reinforced pullout strength increased by 45% and 8.9% for 4.5 and 8 mm defects, respectively, when compared to t= 0 testing. Fiber reinforced calcium phosphate bone cement can be drilled and tapped to support orthopedic hardware for trauma applications. Clin Trans Sci 2010; Volume 3: 112–115 |
| Databáze: | OpenAIRE |
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