Recommendations for standardised screw pull-out from polyurethane foam - The influence of density variations of the test foam and the insertion method

Martin Weidling,Toni Wendler,Stephan Schoenfelder,Christoph-E Heyde

Medical Engineering & Physics（2022）

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摘要

•Slight differences in density of polyurethane foam led to relevant differences in measured values.•Machine insertion of screws increased reproducibility.•Machine insertion of screws and tapping can reduce scattering of measured values.

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关键词

Pedicle screw,Pull-out test,Polyurethane foam,Density variations,Machine insertion

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