This course was for experienced dental surgeons. We plunged deeply into the reparative regeneration of bone defects and the peculiarities of this process in the area of the floor of the maxillary sinus. Modifications of the method of bone augmentation in the area of the floor of the maxillary sinus by trans-alveolar approach and transgingival sinus lifting were developed. Demonstration of the operating protocol was carried out on a simulation unit in ergonomics with an operating microscope.Thank you all for the atmosphere and interest in this topic!