Conclusion: The biomechanical formula can be used to predict the dynamic change of protrusion of the dura mater as well as its substitutes at different sizes of cranial base bone defects.

• 结论：我们建立的颅底骨缺损硬脑膜膨出量评估公式，可以用来预测硬脑膜及其替代物膨出量的动态变化。