Multilayer Ultratranslucent Monolithic Zirconia Crowns Treated With Multimode Universal Adhesive System Containing Zirconia Primer: A Clinical Report.

Introduction: Ultratranslucent zirconia combines high mechanical strength and esthetics, making it ideal for monolithic restorations. This case report describes a total rehabilitation of the upper dental arch with single-unit crowns made of multilayer ultratranslucent zirconia (Prettau 4 Anterior, Zirkonzahn), as well as the use of a simplified adhesive cementation protocol for this type of ceramic.

Materials and methods: A 64-year-old female patient sought rehabilitative treatment, after planning in a semi-adjustable articulator, interim prostheses, from tooth 2 to 15, were installed to restore occlusal vertical dimension and esthetics. After all surgical, periodontal, and endodontic procedures, impressions of the upper and lower arches were taken. In the maxilla, 14 zirconia crowns with a color gradient were fabricated and cemented, with their internal surface treated with a multimode adhesive system containing zirconia primer (Single Bond Universal, 3M ESPE). The same adhesive system was applied to the preparations, and the crowns were cemented with dual resin cement (RelyX Ultimate, 3M ESPE).

Results: After the crowns exhibited excellent esthetic results, with only a minor fracture observed on the palatal cusps of the right first upper premolars.

Conclusions: Thus, ultratranslucent zirconia appears to be a viable option for oral rehabilitation with single-unit crowns due to its excellent clinical performance.

Clinical significance: Monolithic ultratranslucent zirconia crowns are able to reproduce the natural characteristics of dental elements. Additionally, the application of 10-methacryloyloxydecyl dihydrogen phosphate-based primer has proven to be an efficient surface treatment for adhesive cementation of UT zirconia.