上颌前牙根尖周脓肿常由口腔内骨壁较薄的唇侧粘膜排出脓液，如牙根偏向腭侧，则脓液可由腭侧粘膜排出。上颌前牙根尖部的脓液直接进入上颌窦者极为少见。我们遇有1例并获治愈，现报告如下。患者，王某某，女，因右侧上颌窦积液，经全县治疗和局部理疗无明显效果，然后行上颌窦 Periapical abscess of the maxillary anterior pachynema often by the mouth of the labial mucosa of the thin side of the mucus discharge pus, such as the root of the palatal deviation, the pus can be discharged from the palatal mucosa. Anterior maxillary anterior pus directly into the maxillary sinus pus is extremely rare. We encountered one case and were cured, are as follows. Patients, Wang Moumou, female, due to the right maxillary sinus fluid, the county treatment and local physiotherapy no significant effect, and then the maxillary sinus