众所周知,根尖手术是治疗根充失败例的有效方法。然而,由于多生副根管和侧枝根管的存在以及根尖微渗漏等原因,每招致手术治疗的再失败。作者等对这类病例再治疗方案的选择进行了讨论,指出:手术失败多由于多生副根管未得到清理和充填引起。所报道的3例手术失败者皆因遗漏多生副根管引起并经重作根管治疗治愈。由于重作根尖手术的成功率仅30％～40％, As we all know, apical surgery is an effective method to treat cases of failure of the root canal. However, due to the presence of multiple root canal and collateral canals and apical microleakage, each of them leads to another failure of surgical treatment. The authors discuss the options for re-treatment of such cases and point out that the failure of the procedure is often due to un-cleaned and filled multiple accessory root canal. Reported 3 cases of surgical failure were due to omission of multi-root canal caused by multiple root canal therapy and cure. As the success rate of re-apical surgery is only 30% to 40%