Results showed that due to the sharp difference between diameters at the upper and lower parts of the canal, the high-speed air-flow at the lower-end opening can drain the fluid below the opening out while the lower-speed air-flow al the upper opening is
Results showed that due to the sharp difference between diameters at the upper and lower parts of the canal, the high-speed air-flow at the lower-end opening can drain the fluid below the opening out while the lower-speed air-flow al the upper opening is
结果发现：由于根管两端管迳相差悬殊，根尖孔産生的高速气流冲击，吸引根尖液，可引流低于根尖孔的液体；另一方面，开髓孔低速气流不易将口腔内唾液、渗出物重新带入根尖腔。