Shpachynskyi O. Features of subantral augmentation and dental implants procedure in patients with significant bone deficiency in the distal upper jaw

The dissertation presents a solution to a current problem of improving the efficiency of maxillary sinus floor lateral augmentation and the dental implantation surgery, in particular, reducing the frequency of infectious complications and disintegration of implants in patients with edentulism and significant bone deficiency in the maxillary distal parts. This is reached by applying a personalized approach to determine the treatment strategy, regarding the morphology of the nasal sinuses and the condition of the bone tissue at the surgical intervention site. The replacement of dental row defects in the lateral maxillary sections with prosthetic constructions supported by dental implants under insufficient volume and quality of the alveolar process bone, after the loss of upper molars and premolars, is a complex clinical task. The restoration of the lost volume of alveolar bone can be achieved using the lateral augmentation of the maxillary sinus floor (LSFA) with the application of bone-replacement materials of various origin. One of the problems that arise in this context is a significant percentage of complications, which is in the range of 18-20%, and significantly increases in the presence of unfavorable clinical anatomy. Therefore, the prevention of complications and the minimization of negative consequences of open sinus lifting are relevant and timely issues. The design of this dissertation work involved the sequential execution of 3 stages, during which the effect of clinical anatomy and surgical factors on 1) the course of reparative regeneration and bone remodeling in the LSFA procedure area, 2) the morphology and functional state of the mucoperiosteum, and 3) the frequency of complications and disintegration of dental implants in the bone augmentation zone was determined.