A case of massive maxillary sinus bleeding after dental implant.

In recent years, there has been an increase in the number of dental implants, and many complications may arise during implantation. In cases where an artificial tooth is implanted in the maxilla, complications such as acute maxillary sinusitis, oroantral fistula, and displacement of the dental implant to the maxillary sinus may occur due to the anatomical characteristics of the maxilla and the inexperience of providers. The authors report a case of massive maxillary sinus bleeding during dental implant that was controlled successfully by emergency surgery.