Cunningham W T, Martin H, Forrest W R
Oral Surg Oral Med Oral Pathol. 1982 Apr;53(4):401-4. doi: 10.1016/0030-4220(82)90442-x.
The endosonic ultrasonic synergistic system was compared to conventional hand-filing and irrigating techniques for its ability to débride the root canal system. Extracted human teeth were endodontically prepared by conventional and ultrasonic techniques. The roots were cross sectioned and evaluated microscopically at the 1, 3, and 5 mm. levels from the apex for cleanliness. The endosonically prepared canals were significantly cleaner at all levels.
将超声协同系统与传统的手动锉磨和冲洗技术进行比较，以评估其清理根管系统的能力。采用传统技术和超声技术对拔除的人牙进行根管预备。将牙根进行横断面切片，并在距根尖1、3和5毫米处进行显微镜检查，以评估清洁程度。结果显示，采用超声技术预备的根管在各个层面上都明显更清洁。
