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Hip Implant Fatigue Testing Femoral Head, Stem, Acetabular Shell and Linear

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Hip Implant Fatigue Testing Femoral Head, Stem, Acetabular Shell and Linear

Like any medical device, hip implants must be vigorously tested before human use. Hip implants have four separate parts that make up the prostheses; the femoral head, femoral stem, acetabular shell, and acetabular linear. To verify long term strength of hip prostheses designs simple static testing is required to evaluate the compressive, tensile and torsional loading required to fracture a hip prostheses. Fatigue life tests are critical because fatigue failure is more common than catastrophic failure, and it most closely matches in vivo forces. Loading test samples with load-controlled sinusoidal waveforms is most common, and tests last in excess of ten million cycles.