The most frequent intraoperative complication of maxillary sinus elevation procedures is the perforation of the sinus membrane, for which various protocols and grafting materials have been proposed in the literature. This article describes a novel suturing technique to close large sinus mucosa perforations. The technique is demonstrated through two clinical cases in which the sinus perforations occurred (1) in the course of a maxillary sinus elevation procedure and (2) after the removal of a cystic lesion. Bone grafting material and dental implants were placed simultaneously with the sinus repair. No infections occurred, and clinical and radiographic outcomes at 1 year postloading revealed successful implant osseointegration.