Objective to evaluate the influence of the number of burrholes on the operative result of chronic subdural hematomas.
目的分析颅骨钻孔数量对治疗慢性硬膜下血肿效果的影响。
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All holes, slots, edges and corners should be free of loose burrs and slivers. The allowable height of a burr cannot exceed five percent (5%) of the material thickness.