Objective: Compare of the mechanical properties of the bone cement with vacuummixing and normal mixing.
目的：比较骨水泥经过真空搅拌和普通搅拌的机械性能变化。
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Conclusion: the values of fatigue strength and bending strength of the bone cement were improved by vacuummixing. The method of vacuummixing has an active significance in clinic.
When the material is in the process of rotation and revolution, the mixing device can deeply clean the sub micron bubble by adding vacuum extraction function.