断根是拔牙手术中常见的并发症。断根牙应一次取出。但有时因某些原因断根不能一次取出,多年后复查发现原来拔牙伤口愈合良好,无任何症状,X线也无异常。 我科自1970～1983年,共拔牙2461牙次,其中有断根遗留6例,全部发生在磨牙,计下颌第三磨牙2例,上颌第三磨牙2例,上颌第二磨牙1例,上颌第一磨牙1例。 断根存留时间:8年3例,5年2例,3年1例。 Rooting is a common complication in tooth extraction surgery. Broken root should be removed once. But sometimes for some reason can not remove the root once removed, many years after the review found that the original tooth extraction wound healing, without any symptoms, X-ray was normal. My department from 1970 to 1983, a total of 2461 teeth extraction times, including the root left in 6 cases, all occurred in the molar, the total mandibular third molar in 2 cases, the maxillary third molar in 2 cases, the maxillary second molar in 1 case, the maxillary A molar in 1 case. Broken root retention time: 8 years in 3 cases, 5 years in 2 cases, 3 years in 1 case.