拔牙术中牙根折断是常见的并发症。在取上颌磨牙断根的过程中，由于牙根与上颌窦底甚近，有时甚至根尖与上颌窦仅为粘膜相隔，因此在临床拔牙术中致牙根误入上颌窦者并非罕见。本文总结了我科在近１０年来应用牙槽窝开窗法取上颌窦断根的病例２１例，均获得满意效果，报告... Extraction of tooth root fracture is a common complication. In the process of taking the root of the maxillary molars, it is not uncommon for the root of the maxillary sinus to be mistaken for the maxillary sinus in clinical extraction because the root is very close to the maxillary sinus floor and sometimes even the apical and maxillary sinus are only mucosal. This article summarizes our department in the past 10 years, application of alveolar fossa fenestration removed 21 cases of maxillary sinus root obstruction, have obtained satisfactory results, the report ...