Optimization of the Final Stage of Zirconium Dioxide-Based Prosthesis Preparation for Fixation in the Patient’s Oral Cavity

Abstract

Laboratory study of the acid etching impact on the surface of domestic ceramic translucent zirconium dioxide-based samples by special acid composition has been conducted in order to improve the esthetic qualities of ceramic dentures based on zirconium dioxide as well as to reduce the risk of their breakage and debonding by improving the final treatment methods of the prosthesis surface before fixation in the oral cavity, namely special acid etching of the internal surface and fluorescent glaze applied only to the prosthesis areas visible at a wide smile. The adhesive strength to composite resin cement has been assessed and three different dental fluorescent glazes have been studied for bending strength of zirconium dioxide samples depending on the coating area. The issue of combined effect of the zirconium dioxide-based ceramic’s surface chemical preparation has been studied with a view to increasing both the adhesive strength and the esthetic characteristics. A conclusive reduction in the strength of zirconium dioxide-based ceramic samples after the ceramic coating of each of the studied fluorescent glazes and a significant increase in the adhesive strength of ceramic with composite resin cement after etching with a special composition are shown. To improve the esthetics of zirconium dioxide dental prostheses, prevent the fractures of prostheses and reduce the possibility of their debonding in the oral cavity, it is recommended to apply fluorescent glaze with a minimum sufficient thickness and only on the vestibular and partially occlusal zones, and before fixing to composite resin cement in the oral cavity it is advisable to carry out chemical treatment of the ceramics’ bonded surface with a special etching solution.