EXPERIMENTAL AND CLINICAL EVALUATION OF METHODS FOR IMPROVING THE FIXATION OF FIXED PROSTHODONTIC CONSTRUCTIONS MADE OF ZIRCONIUM DIOXIDE

The widespread adoption of zirconium dioxide in restorative dentistry is driven by its superior biocompatibility and aesthetic properties, yet its chemical inertness poses significant challenges for reliable adhesive cementation. This article presents a comprehensive study conducted at the Department of Orthopedic Stomatology of Andijan State Medical Institute, aiming to establish an optimal fixation protocol for zirconia-based fixed prostheses. Utilizing the IMRAD framework, the research investigates the efficacy of various surface treatment methods, including air-particle abrasion with aluminum oxide and the application of 10-MDP containing primers, both in vitro and in vivo. The laboratory phase evaluated the shear bond strength of zirconia specimens bonded to dentin analogs, while the clinical phase monitored the retention and marginal integrity of crowns cemented in patients over an eighteen-month period. The results indicate that a combined protocol of mechanical surface roughening and chemical priming significantly enhances bond strength and clinical survival rates compared to conventional cementation methods. The study concludes that the integration of tribochemical surface treatments is essential for the long-term success of zirconia restorations.