Abstract: Maxillary sinus bleeding is common during and after sinus floor elevation, which may cause unclear visual field, accidental perforation of sinus mucosa, or even changes of vital signs. It’s important to have a clear understanding of this kind of complication. Based on the clinical experiences of some national experts, and combined with the references of international expertise, this article summarized the pathogenesis of maxillary sinus floor elevation hemorrhage, the anatomy of the alveolar antral artery, the clinical manifestations and treatment, and the precautions. An expert consensus was reached to provide criteria and references for sinus floor elevation.

Key words: Sinus floor elevation, Maxillary sinus bleeding, Alveolar antral artery, Expert consensus