Layered Zirconia restorations combine both the high flexural strength of zirconia, the highest aesthetics and flexibility you require for all anterior and posterior cases to ensure superior appearance and fit. This zirconia substructure offers a flexural strength of 1200 MPa compared to traditional porcelain fused to metal restorations. This anterior-grade formulation is made using proprietary processing, which leads to lifelike translucency, beautiful shade-matching and extraordinary strength. 

With layered esthetic zirconia restorations there will be no metal to show through, discoloration of the restoration and no unsightly black lines at the gingival margins as they have natural lifelike coloration that blends in and perfectly compliments your preexisting dentition. Moreover, extensive laboratory testing has shown that the flexural strength and toughness of zirconia are significantly higher unlike that of any other all-ceramic options or alumina. This solution is great for the patients experiencing nighttime bruxism as they are cemented conventionally with resin ionomers cement has fracture-resistance and demonstrate outstanding biocompatibility in the mouth. They can also be adjusted easily to chair-side with a green stone or a diamond bur.

Benefits:

• Optimized combination of strength and translucent porcelain. 
• Substructure Strength up to 1,200 MPa. 
• Enhanced shade matching reproduction and wear-kind to opposing dentition. 
• Highly biocompatible and hypoallergenic for improved tissue health and great option for patients with metal sensitivity. 
• Anterior and highly aesthetics results with no black lines or gingival graying as well as semi-transparent with a high opacity to mask underlying metal cores, tooth discoloration and implant abutments. 
• Reduction in chair-side because of precise CAD/CAM internal fit and contact adaptation.

Indications

Zirconia is versatile as it can be used in almost any conditions including singles, bridges with any combination of inlay bridges, Maryland type bridges, abutments and pontics, and screw-retained implants. 

Contradictions

When esthetics expectations are high, it is crucial that the restorations match surrounding other existing restorations or natural dentition. If bonding is required to retain the restoration, then bond strength is weaker and less predictable than any other ceramics.

Cementation

• Cemented using resin-reinforced glass ionomer: RelyX (3M ESPE), Fuji Plus (GC America) 
• If a greater bond is required because of the lack of a retentive preparation, use resin cements for short or over-tapered preparations: RelyXUnicem (3M ESPE) or RelyX
• Ultimate Ceramir C & B (Doxa)

Preparation requirements 

• A mild chamfer or slight feather-edge margin is preferred for best result
• A more conservative preparation is needed for e.max 
• Occlusal space of 0.5-mm; 1 mm is ideal 

ADA codes 

• D2740 Crown – Porcelain/Ceramic Substrate D6245 
• Pontic Porcelain/Ceramic D6740 
• Abutment Crown Porcelain/Ceramic