Mandelli, Federico Letter regarding a case report of severe bleeding after sinus floor elevation using the transcrestal approach published in EJOI in 2012. [electronic resource] - European journal of oral implantology 2013 - 321-2 p. digital Publication Type: Letter; Comment ISSN: 1756-2406 Subjects--Topical Terms: Dental Implantation, Endosseous--adverse effectsFemaleHumansMaxilla--surgeryPostoperative Hemorrhage--etiologySinus Floor Augmentation--adverse effects