干槽症一直是一个并发于下颌第三磨牙拔牙创的者大难问题。在拔牙手术中干槽症的发生率曾报告为0.9—3.2%。而在下颌第三磨牙拔除术中干槽症的发生率则为20—30%,大大高于前者。干槽症发生的确切原因尚不明,曾经提出过的发病因素有细菌、手术创伤、循环变更、血块中纤维蛋白溶解活性增加以及术后护理不良。 Dry Slot Syndrome has always been a catastrophic problem associated with pulling a tooth in the third molar of the mandible. The incidence of dry trough in extraction surgery has been reported as 0.9-3.2%. In the mandibular third molar removal surgery, the incidence of dry socket is 20-30%, much higher than the former. The exact cause of dry socket disease is not known. The factors that have been suggested include bacteria, surgical trauma, changes in circulation, increased fibrinolytic activity in the blood clot and poor postoperative care.