Clinical Cases, Labside

A new formula for aesthetic monolithic long-span restorations

Case by MDT Daniele Rondoni

Usually, the aesthetic potential of a dental ceramic material – specifically its translucency – may be increased only at the expense of a decreased flexural strength. The new KATANA™ Zirconia YML from Kuraray Noritake Dental Inc. is different. With its high flexural strength of 1,100 MPa in the lower half of the blank and high translucency in the upper body and incisal areas, it has a high aesthetic potential and an unlimited indication range, as shown using the following case example.

Fig. 1. KATANA™ Zirconia YML 4-unit and 6-unit bridges after milling and sintering. A natural vestibular surface texture plays a decisive role in the creation of aesthetic monolithic restorations.

Fig. 2. The two bridges on the model after ultra-micro layering with CERABIEN™ ZR FC Paste Stain Kuraray Noritake Dental Inc.).

Fig. 3. Stained and glazed restorations and their translucency in transmitted light.

FINAL SITUATION

Fig. 4. Buccal view of the 6-unit bridge cemented in the patient’s mouth.

Fig. 5. Buccal view of the 4-unit bridge cemented in the patient’s mouth.

With this new type of multi-layered zirconia, it is possible to produce aesthetic monolithic restorations suitable even for use in the anterior area. A high design flexibility is offered despite strength gradation, and the high translucency in the incisal area is responsible for a natural look after sintering. Ultra-micro layering and glazing on the monolithic surface will be sufficient to produce outcomes to our patients’ satisfaction.