[Use of bone blocks by sinus floor lifting].

The paper presents clinical cases illustrating two sinus floor lifting technique performed for dental implant placement in areas with maxillary sinus floor atrophy: bone block fixation for vertical augmentation (used for immediate implant placement by sinus floor atrophy to 1 mm thickness) and perforation closure. Sinus floor perforations wider than 5 mm were repaired by mandible bone graft providing the possibility of immediate implantation. Bone block was fixed between cortical layers of the maxilla with no internal fixation. Free bone blocks provide additional primary stability of dental implants.