Evaluation of strength at the acrylic-pin interface for variably treated external skeletal fixator pins

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Abstract

Objective: To report pullout force to failure at the acrylic-pin interface for variably treated 3.2mm external skeletal fixator pins. Study Design: In vitro biomechanical evaluation. Sample Population: 3.2mm external skeletal fixator pins in polymethylmethacrylate bars. Methods: 3.2mm external skeletal fixator pins were used for each of 5 treatment groups: polished, unpolished, 3 notched, 5 notched, and machine knurled. Each pin was seated into a 2-cm-diameter acrylic connecting bar and tested in pullout force to failure. Each group consisted of 6 pins. The force required to remove the pins from the acrylic bar was measured and compared between groups. Results: Significant differences between treatment groups were determined (P

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Brad Case, J., & Egger, E. L. (2011). Evaluation of strength at the acrylic-pin interface for variably treated external skeletal fixator pins. Veterinary Surgery, 40(2), 211–215. https://doi.org/10.1111/j.1532-950X.2010.00774.x

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