Vertical augmentation is carried out for an atrophied upper jaw using retrograde sinus augmentation. At the same time, an implant is inserted in the augmented area. The existing bone defect is augmented through elevation of the sinus floor using bone substitute. Professor Hinze, dental surgeon, demonstrates retrograde sinus augmentation under local anaesthetic.

During this procedure, an incision is made, an entire flap layer prepared, and the maxillary sinus wall clearly exposed. An access window is prepared using rotating instruments and the bone flap carefully broken through using a rounded chisel in order to prevent damage to Schneider's membrane.

During retrograde sinus augmentation, Schneider's membrane is mobilised by guiding the instruments while maintaining bone contact at all times in order to prevent tearing. The implant bed is then prepared with slow precision drilling. Before placing the implant, retrograde sinus augmentation is continued by inserting bone substitute.